--- title: Customer.io Reviews meta_title: 'Customer.io Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter 890 reviews by the users' company size, role or industry to find out how Customer.io works for a business like yours. aggregate_rating: rating_value: 4.4 review_count: 890 scale: '5' date_modified: '2026-08-01' parent_category: name: Marketing url: https://www.g2.com/categories/marketing --- # Customer.io Reviews **Vendor:** Customer.io **Category:** [Marketing Automation Software](https://www.g2.com/categories/marketing-automation) **Average Rating:** 4.4/5.0 **Total Reviews:** 890 ## About Customer.io Customer.io is the leading customer engagement platform for product-led organizations. Engage users based on real behavior and build stronger customer relationships across email, SMS, push, in-app, and webhooks. Now with an intuitive AI agent that handles the repetitive work, your team can focus on timing, strategy, and getting more impact from every message. ## Customer.io Pros & Cons **What users like:** - Users appreciate the **ease of use** of Customer.io, highlighting its seamless functionality and intuitive interface. (227 reviews) - Users appreciate the **flexibility and control** Customer.io offers for managing transactional emails and automations. (152 reviews) - Users value the **versatile features** of Customer.io, enjoying seamless email management and powerful content editing tools. (128 reviews) - Users value the **helpful support** from Customer.io, enhancing their email marketing journey with ease and efficiency. (127 reviews) - Users commend the **helpful customer support** of Customer.io, enhancing their experience with seamless integration and documentation. (125 reviews) - Automation Efficiency (119 reviews) - Integrations (113 reviews) - Easy Setup (112 reviews) - Intuitive (107 reviews) - Easy Integration (103 reviews) **What users dislike:** - Users face a challenging **learning curve** with Customer.io, often requiring trial and error for effective use. (91 reviews) - Users are frustrated by the **missing features** , particularly lacking advanced reporting tools and flexible segmentation options. (78 reviews) - Users are frustrated by **limited features** in Customer.io, hindering workflow efficiency and complicating campaign management. (59 reviews) - Users find the platform **not intuitive** , struggling with a steep learning curve and dated UI elements. (52 reviews) - Users express a desire for **more flexibility in organizing campaigns** , which limits efficiency and complicates workflows. (44 reviews) - Difficult Learning (35 reviews) - Poor Customer Support (35 reviews) - Reporting Issues (35 reviews) - Users face **segmentation issues** with limited linking options and unintuitive updates that complicate campaign management. (35 reviews) - Steep Learning Curve (35 reviews) ## Customer.io Reviews ### 1. build complex campaigns **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Information Technology and Services | Enterprise (> 1000 emp.) **Reviewed Date:** July 31, 2025 **What do you like best about Customer.io?** it ingests events and snowflake based attributes to allow for personalized and real-time triggered campaigns it's interface can be easy to navigate **What do you dislike about Customer.io?** sometimes the segment builder can be slow. **What problems is Customer.io solving and how is that benefiting you?** helping to connect the right message to the right user ### 2. Great platform **Rating:** 5.0/5.0 stars **Reviewed by:** Joel G. | Email and Automation Specialist, Mid-Market (51-1000 emp.) **Reviewed Date:** October 30, 2024 **What do you like best about Customer.io?** A couple of things: I like the amount of integrations possible and that newsletters are not limited to just A/B test. You can do A/B/C or A/B/C/D tests. I like that attributes can be easily managed and use for customization. **What do you dislike about Customer.io?** The limitations of the reports. I believe that it would benefit Customer.io if the reports could be more customized. Would be great if we could build our own reports and even use the attributes in those reports. **What problems is Customer.io solving and how is that benefiting you?** Customer.io makes integration easy. The truth is that I have not seem such an easy integration with database has I have seen on Customer.io. With seamless integration we could start working on our projects very quickly. Also Customer.io provides a lot of relevant and helpful documentation that has assisted me and our devs into the integrations we are using. ### 3. Robust automation tool for all business sizes **Rating:** 4.0/5.0 stars **Reviewed by:** Brandon J. | Digital Product, Financial Services, Enterprise (> 1000 emp.) **Reviewed Date:** February 19, 2025 **What do you like best about Customer.io?** Customer.io offers robust automation and segmentation capabilities that i find invaluable for creating highly personalised campaigns. **What do you dislike about Customer.io?** The platform’s user interface feels unintuitive, and I think new users need a more comprehensive onboarding resources to shorten the learning curve. **What problems is Customer.io solving and how is that benefiting you?** Customer.io primarily solves the challenge of delivering targeted, personalised communications at scale by providing robust segmentation and automation tools. This benefits us by streamlining messaging workflows—reducing manual effort, increasing campaign relevance for specific audience segments, and ultimately driving higher engagement and conversions. ### 4. Best tool for comms to end users **Rating:** 4.5/5.0 stars **Reviewed by:** Carlos A. | CTPO, Small-Business (50 or fewer emp.) **Reviewed Date:** February 21, 2025 **What do you like best about Customer.io?** We can do things from very basic and easy like workflows to send notifications base of Events & Segments, to advance workflows where it sends data to our API, to assign a certain promotion to some users. **What do you dislike about Customer.io?** Pricing base on total users makes you think about when to remove users. I would prefer a pricing based on active users who has received a notification. **What problems is Customer.io solving and how is that benefiting you?** If you want to build everything in house, you will loose a lot time. ### 5. Neat and affordable compared to the 'big guys' **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Retail | Small-Business (50 or fewer emp.) **Reviewed Date:** August 03, 2025 **What do you like best about Customer.io?** Ease of use, UI, affordability especially when comparing to other big players **What do you dislike about Customer.io?** some weird restrictions surrounding segmenting, journeys, etc **What problems is Customer.io solving and how is that benefiting you?** Neededed a platform to enable us to easily and seamlessly send messages to our users ### 6. Easiest way to make custom emails **Rating:** 5.0/5.0 stars **Reviewed by:** Pedro M. | Technical Lead, Small-Business (50 or fewer emp.) **Reviewed Date:** September 13, 2023 **What do you like best about Customer.io?** What I really like is the easy it is to design email and to send them via API. This make our developing time shorter and our designer can directly edit our templates. Also the history of emails sent is pretty cool, this have help us a lot in customer support terms, to know if a client received their emails, if they opened it, etc **What do you dislike about Customer.io?** I understand is for security reasons but having to double authenticate every time I need to access to the dashboard is kind of annoying. Also we're having problems with apple mail and outlook **What problems is Customer.io solving and how is that benefiting you?** Email design. As a developer one of the greatest headache is designing emails with html and css. Customer io makes it too easy ### 7. Powerful tool with very good support **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Veterinary | Mid-Market (51-1000 emp.) **Reviewed Date:** May 22, 2025 **What do you like best about Customer.io?** It is a very powerful tool with lots of integrations. Customer.IO is powerful enough to grow with our needs. The implementation was not too hard and both their customer support & documentation are very helpful. **What do you dislike about Customer.io?** At some places in the campaign builder errors came up which were not easily recognizable and comprehensible. **What problems is Customer.io solving and how is that benefiting you?** Automating our email marketing campaigns. Later we will also benefit from the possibility to integrate push-notifications, WhatsApp, etc. ### 8. Marketing Automation Powerhouse! **Rating:** 5.0/5.0 stars **Reviewed by:** Faraz K. | Growth Software Engineer, Mid-Market (51-1000 emp.) **Reviewed Date:** November 26, 2024 **What do you like best about Customer.io?** Easy and flexible ways to - Create Marketing workflow based on various triggers - Send and send out Push Notifications - Great and easy to use SDK to capture Device token **What do you dislike about Customer.io?** Honestly no downsides as of yet We faced some issues regarding the in-app not working as expected but then it turned out that we were on an older SDK version **What problems is Customer.io solving and how is that benefiting you?** Customer.io is helping us sending out transactional emails, and run complex marketing campaigns to manage user object and event objects. Enabling marketing automation which frees up a lot of engineering hands to do a lot of things. Honestly we are heavily reliant on customer.io for majority of the business tech and the value it provides is immense. ### 9. Good CX and UX! **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Computer Software | Small-Business (50 or fewer emp.) **Reviewed Date:** August 17, 2025 **What do you like best about Customer.io?** Mature product with lots of features and options **What do you dislike about Customer.io?** Sometimes it takes time to figure out some details since the product is complex **What problems is Customer.io solving and how is that benefiting you?** Automatize CRM activity ### 10. Gets the job done, but not worth recommending **Rating:** 0.0/5.0 stars **Reviewed by:** Verified User in Consulting | Small-Business (50 or fewer emp.) **Reviewed Date:** October 02, 2025 **What do you like best about Customer.io?** Customer.io is functional and delivers what it promises. It provides enough automation and segmentation tools to handle campaigns effectively. The workflows are straightforward once set up, and it integrates decently with other platforms. It works fine for basic needs and is reliable for what it’s designed to do. **What do you dislike about Customer.io?** While the product itself works, the company’s sales tactics are extremely predatory and pressure-driven which leaves a bad taste in the mouth. After 10 years in IT administration, only Adobe has felt worse in this area. Customer.io comes in a close second, and that alone makes me want to move away from it on principle. I would never recommend it despite its functionality. **What problems is Customer.io solving and how is that benefiting you?** Marketing email campaigns ### 11. Super intuitive! **Rating:** 4.5/5.0 stars **Reviewed by:** Joana S. | CRM Marketer, Mid-Market (51-1000 emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** For me, the platform is very intuitive and easy to use/explore. It's very easy to build complex flows and the A/B testing requires minimal setup. Customer support is also usually very fast with the replies. **What do you dislike about Customer.io?** I would like to have more insights on C.IO and not needing to rely on data analytics from other platforms. **What problems is Customer.io solving and how is that benefiting you?** We use Customer.io for all our communication with the users - it's an essential part of the business. ### 12. Everything you need from an engagement platform, plus amazing support **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Financial Services | Small-Business (50 or fewer emp.) **Reviewed Date:** February 26, 2025 **What do you like best about Customer.io?** CIO has everything you need from and engagement platform, creating workflows is easy and intuitive, and new improvements are added all the time. But what I like about the most is their amazing support. When so many services lead you to a help center or some AI bot, it's amazing to get super fast response from a human, that always have a good answer. **What do you dislike about Customer.io?** Nothing major, I think the data on the main campaign screen can be more dynamic for you to analyse , but nothing apart from that comes to mind **What problems is Customer.io solving and how is that benefiting you?** Comuunction with our users, both from automation campaigns to broadcast and also managing our data ### 13. Highly Customizable, But Limited Third-Party Integrations **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Consumer Services | Mid-Market (51-1000 emp.) **Reviewed Date:** October 30, 2025 **What do you like best about Customer.io?** Easy to customize, easy to work with. Most things you need are there. **What do you dislike about Customer.io?** Little integration with 3rd party softwares **What problems is Customer.io solving and how is that benefiting you?** Chat, mainly. With customers. ### 14. Could be a powerful, well-designed platform with some additional support and organisation tools **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Telecommunications | Mid-Market (51-1000 emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** Generally a very powerful, well-designed platform that enables us to quickly and simply put together one-off comms and campaigns. **What do you dislike about Customer.io?** Some of the documentation/help articles are lacking. Some more detailed self-help support would improve ease of use and enable users to get the most out of the features available. Further ability to organise content, campaigns, email etc. would be helpful (e.g. for multiple teams using the same instance). There are some basic features lacking in this area - for example, being able to delete template folders - resulting in messy workspaces. **What problems is Customer.io solving and how is that benefiting you?** Transactional emails that we can customise based on segments, report on success and test enhancements e.g. by A/B testing. ### 15. Migrated to Customer.io and never looked back **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Sports | Mid-Market (51-1000 emp.) **Reviewed Date:** February 19, 2025 **What do you like best about Customer.io?** User friendly, great onboarding, and amazing support. Getting started with Customer.io was easy and we had zero trouble integrating with our existing stack. We use it regularly for multiple channels and brands. It has all of the features we needed and then some. The ability to also use the data pipeline feature allowed us to migrate from our existing CDP and have everything housed under one roof. **What do you dislike about Customer.io?** Cost can be high and if you don't have some technical ability it may be tough to get setup. **What problems is Customer.io solving and how is that benefiting you?** A centralized place for all of our customer communications allows us to streamline our processes and have a holistic view of our customers. ### 16. Choosing Customer.io was a big mistake! **Rating:** 0.0/5.0 stars **Reviewed by:** Verified User in Information Technology and Services | Small-Business (50 or fewer emp.) **Reviewed Date:** November 25, 2024 **What do you like best about Customer.io?** Their marketing platform is good but there's nothing you wouldn't get elsewhere. **What do you dislike about Customer.io?** We've been with Customer.io for over 10 years (July 2014 to November 2024) and deeply regret ever doing business with them. Moving email sequences to another provider is painful and costly, Customer.io know this and they fully take advantage of it. Every five-years or so Customer.io double their prices or so, the massive price increase is imposed on you (no grand fathering) and they don't care if the new pricing works for you as a business. From a product point of view, we reviewed the major alternatives to Customer.io before migrating out, and I can say that there's nothing Customer.io does that their competitors don't do (most of the time for cheaper given that email marketing automation is a commodity nowadays). We've been able to reduce our costs by >3x by moving out, the new tool we've selected also offers additional functionalities that will enable us to remove our ticketing software leading to additional savings. Oh and contrarily to Customer.io, our new provider doesn't charge by profile so we will also save time by not having to remove profiles every month to try to save on cost. All in all: - if you're considering Customer.io: run you'll find much better elsewhere - and if like us you're a customer of theirs unhappy with their prices and wondering if it's worth moving out: it is! The grass is much greener on the other side. Hope this helps **What problems is Customer.io solving and how is that benefiting you?** We used them for marketing automation. ### 17. All-in-one solution for marketing strategy **Rating:** 4.5/5.0 stars **Reviewed by:** Martijn v. | Manager of Operations, Small-Business (50 or fewer emp.) **Reviewed Date:** February 10, 2025 **What do you like best about Customer.io?** After using many other similar tools, there were always some downsides. Not with Customer.io. It's great that we now have one tool for transactional mailings, newsletters, push notifications, and in-app messages. All messages can be combined in fully automated campaigns, which can be fully personalized based on our customer events and properties. **What do you dislike about Customer.io?** At this moment, there are no downsides for us. **What problems is Customer.io solving and how is that benefiting you?** Personalized campaigns based on events and user properties sent at an affordable rate. ### 18. Pretty Intuitive **Rating:** 4.0/5.0 stars **Reviewed by:** Camerin T. | Sr. Marketing Manager, Small-Business (50 or fewer emp.) **Reviewed Date:** May 19, 2025 **What do you like best about Customer.io?** Testing options! Very easy to get around and figure out how to build emails. **What do you dislike about Customer.io?** Onboarding and training could be a bit better and I'm not understanding why they've decided to use different nomenclature than most email marketing tools use. I've found myself using ChatGPT a lot to figure out how to use the tool. **What problems is Customer.io solving and how is that benefiting you?** Customer onboarding, re-engagement, and transactional type email journeys ### 19. Great platform for communicating with users **Rating:** 5.0/5.0 stars **Reviewed by:** Jobe M. | Senior Growth Marketing Associate, Small-Business (50 or fewer emp.) **Reviewed Date:** September 06, 2024 **What do you like best about Customer.io?** The most useful feature for me is the ability to segment users in Customer.io. On other platforms, I had to manually upload CSV sheets of users to segment them how I wanted, but Customer.io integrates right with our platform, and I can segment our users based on any attribute. What could take hours before can now be done in minutes! I use the platform daily to communicate with users about everything from account updates to promotions. The platform is easy to understand, and the team has always been quick to respond anytime I need assistance! **What do you dislike about Customer.io?** I do wish we had the ability to save drag-and-drop emails as templates. It would also be nice if we could build segments based on a user's inclusion in other segments. Often times there is overlap in segments, and it would be nice to include that when building one so I don't have to add all attributes in again. **What problems is Customer.io solving and how is that benefiting you?** Before, I had to request CSV lists of users from our Engineering team. I had to give them a detailed list of what criteria I needed, and wait a few days to build the report. Now, I can build a segment on my own in minutes, which has compeltely transformed our ability to quickly and easily communicate with our users. ### 20. A capable messaging tool that is also reasonably affordable **Rating:** 4.5/5.0 stars **Reviewed by:** Shaikh A. | Sr. Content Designer, Mid-Market (51-1000 emp.) **Reviewed Date:** September 14, 2023 **What do you like best about Customer.io?** One overwhelmingly positive thing about CustomerIO is how much you can do with it given its price point. When it comes to value proposition and feature set, it goes head to head with some really pricey options on the market without naming any names. The flexibility in setting up a campaign with ease and relatively fast means you don't really need another tool for your messaging strategy. And a shoutout here is due to its excellent Customer Support team, whose representatives are always not only quick in responses but go above and to help answer questions and offer useful tips. **What do you dislike about Customer.io?** The documentation could use some refinements i.e. by making the information more digestible and easier to find. The new AI search tool is a promising step in this direction. **What problems is Customer.io solving and how is that benefiting you?** As I alluded to earlier, customer.io delivers a lot of the value of the big really pricey and expensive tools at a fraction of their price. I say this as someone who has used an expensive messaging tool previously. ### 21. Great software **Rating:** 5.0/5.0 stars **Reviewed by:** Frida N. | UX designer, Small-Business (50 or fewer emp.) **Reviewed Date:** April 22, 2025 **What do you like best about Customer.io?** The software is easy to use and gives us a very time efficient way to handle customer communication as a small company. When needed their support is always very helpful. **What do you dislike about Customer.io?** I miss a way to distinguish different types of customers, for us private persons and companies (that has private persons representing them). **What problems is Customer.io solving and how is that benefiting you?** Customer.io helps us set up automated communication of different sorts with our customers, which is crucial for a small company like ours. ### 22. The most comprehensive B2C communication platform **Rating:** 5.0/5.0 stars **Reviewed by:** David O. | Founder, Small-Business (50 or fewer emp.) **Reviewed Date:** October 16, 2024 **What do you like best about Customer.io?** As a founder of a growth marketing agency, I've worked with most communication platforms that exist over the years. To me CIO is the most comprehensive tool, it's extremely intuitive and you can easily visualise your data. The fact that it has native integrations with Meta and Google Ads is super helpful to move our users through the funnel. We usually set it up with Segment.com and that means that all of our data is perfectly structured upon using the platform - I highly recommend going down this path! **What do you dislike about Customer.io?** The only limitation that I would find is that users need to be slightly technical to best use customer.io You need to be comfortable organising, structuring and leveraging data. **What problems is Customer.io solving and how is that benefiting you?** Personlisation at scale Data visualisation and reporting Email marketing at scale ### 23. Very Helpful! **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Marketing and Advertising | Small-Business (50 or fewer emp.) **Reviewed Date:** May 22, 2025 **What do you like best about Customer.io?** Customer.io is AI at its finest. There are so many features and editable fields. There are several instructions you can add based on what you need. **What do you dislike about Customer.io?** I cannot search by client name, only e-mail and invoice number. This make it difficult sometimes when I want to see the account as a whole. **What problems is Customer.io solving and how is that benefiting you?** Auto E-mails instead of manual e-mails. ### 24. A comprehensive crm and email automation tool **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Mental Health Care | Mid-Market (51-1000 emp.) **Reviewed Date:** May 26, 2025 **What do you like best about Customer.io?** It is very complete, allows to send different types of comms and to edit the automations as you want. Customer support works greatly. **What do you dislike about Customer.io?** it can be very technical to integrate with other tools and still missing a few important analytics features **What problems is Customer.io solving and how is that benefiting you?** we can send all comms in one platform and rely on instant data ### 25. Amazing support all round **Rating:** 5.0/5.0 stars **Reviewed by:** Bukola E. | Marketing Lead, Small-Business (50 or fewer emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** I especially like the part where their customer support is always on deck to help me out with complications **What do you dislike about Customer.io?** The platform can be a bit complicated to navigate sometimes. I will appreciate clearer prompts to fix errors within the software. **What problems is Customer.io solving and how is that benefiting you?** We use it to connect with our customers, both prospective and current, to drive more conversion, share important information and other communications. ### 26. Simple to use, even if non-technical **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Consumer Services | Small-Business (50 or fewer emp.) **Reviewed Date:** March 05, 2025 **What do you like best about Customer.io?** The drag and drop features for creating campaigns are very easy to put together and test out. We've experimented with multiple types of campaigns (email, push etc.) and it manages it all in one spot. **What do you dislike about Customer.io?** I have been less impressed by the customer support of customer.io. Typically our conversations have not been very helpful, and it has taken a while for customer support to get back to us. **What problems is Customer.io solving and how is that benefiting you?** We have thousands of users and it helps us segment them and target them at the right moment in each user's journey. ### 27. Well, customer.io has been great to work with. They have responsive support. **Rating:** 5.0/5.0 stars **Reviewed by:** Jonathan A. | Marketing Analyst, Mid-Market (51-1000 emp.) **Reviewed Date:** March 10, 2025 **What do you like best about Customer.io?** I particularly like the balance between technical and nontechnical. It's designed to work well with both technical and nontechnical talents. **What do you dislike about Customer.io?** Some features require some technical knowledge, and there isn't a lot of tutorials online about how to set those things up. **What problems is Customer.io solving and how is that benefiting you?** It is helping us connect with our customers well. ### 28. A powerful and robust tool **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Health, Wellness and Fitness | Mid-Market (51-1000 emp.) **Reviewed Date:** February 10, 2025 **What do you like best about Customer.io?** CustomerIO allows us to build and manage various multi-channel campaigns, while integrating seamlessly with our other systems. We find it easy to use by all team members – from product managers to engineers. Throughout my time using customerIO, I have opened various inquiries to the CustomerIO team and their customer support has always been top-notch, responding within the day with deatiled responses. **What do you dislike about Customer.io?** The fact that changes in campaigns are immediately live and there is not room for errors or exploration. Also, you cannot A/B test emails once they have been translated to a different language. **What problems is Customer.io solving and how is that benefiting you?** Managing all of our user communication ### 29. 10/10 Great Support **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Manufacturing | Small-Business (50 or fewer emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** Customer.io has been an amazing tool for our marketing automation. The live chat support is outstanding—always responsive, helpful, and quick to find solutions to any issues we encounter. The ease of segmentation makes targeting the right audience effortless, and the workflow builder is amazing/ **What do you dislike about Customer.io?** he drag-and-drop features save us time, though they can be a bit clunky and sometimes hard to move around. I also wish there was an option to save dynamic display Liquid snippets and select them from a dropdown for easier reuse. **What problems is Customer.io solving and how is that benefiting you?** Creating great segmentation and creating easy workflow and email automations. ### 30. A good, flexible platform for the price **Rating:** 3.5/5.0 stars **Reviewed by:** Verified User in Hospital & Health Care | Mid-Market (51-1000 emp.) **Reviewed Date:** May 19, 2025 **What do you like best about Customer.io?** Flexibility in buildng campaign workflows Always adding new features Very helpful documentation Very responsive support team **What do you dislike about Customer.io?** Requires occasional dev work Lacking depth in analytics reporting Inability to exclude people in specific campaigns from other campaigns (must be segment-based) **What problems is Customer.io solving and how is that benefiting you?** Helps with segmentation of customers and automation of campaigns across multiple channels. ### 31. Customer.io as our central platform for all customer communications **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Marketing and Advertising | Mid-Market (51-1000 emp.) **Reviewed Date:** January 14, 2025 **What do you like best about Customer.io?** What I like best about Customer.io is its user-friendly interface and intuitive workflow builder. It makes it incredibly easy to create automated email sequences that are highly targeted and personalized. I can quickly segment my audience based on their behavior and attributes, and then trigger relevant messages at the right time. This helps me nurture leads, onboard new users, and drive conversions with minimal effort. **What do you dislike about Customer.io?** Reporting could be more robust: While Customer.io provides basic reporting on email performance, I'd like to see more in-depth analytics and segmentation capabilities. It would be helpful to have more granular data on customer behavior and campaign effectiveness. **What problems is Customer.io solving and how is that benefiting you?** Customer.io is solving the problem of creating personalized customer journeys at scale. Before, managing individual communications across different channels was incredibly time-consuming and prone to errors. Now, we can automate personalized messages based on user behavior and attributes, which has increased our engagement and conversion rates. ### 32. Customerio thoughts **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Computer Software | Small-Business (50 or fewer emp.) **Reviewed Date:** December 11, 2024 **What do you like best about Customer.io?** I find it very easy to use. The dev team clearly cares about the product. We have other CDP platforms integrated, and it always feels like doing things in Customerio is effortless compared to others. For example, the email/I'd identifier setup is awesome. In Posthog, another platform we use, I had to spend a week figuring out how to navigate from ids to emails as identifiers. With CIO it's already built in! **What do you dislike about Customer.io?** I am a Firefox user, and one thing I've found is the email editor is quite bugged. Scrolling around the different windows is really unresponsive, to the point that I can basically only use it with Chrome. **What problems is Customer.io solving and how is that benefiting you?** Automating email campaigns is huge. The campaign editor is very well build. Transactional emails are great as well. ### 33. Pretty awesome tool **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Automotive | Mid-Market (51-1000 emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** We are using the tool mainly to send out newsletter once a week. Therefore we need to cluster different sections of customer profiles after we connected it to our data base. This works pretty smooth. Thanks Customer.iO. Customer support is great if needed. Overall it is easy to use. **What do you dislike about Customer.io?** Sometimes it is a little bit slow but to be hones we have a lot of data, so that might be one of the reasons. **What problems is Customer.io solving and how is that benefiting you?** Easy send out to houndred thousand of customers in a couple of minutes. Saving a lot of time. ### 34. Best tool to manage your transactional or marketing email. **Rating:** 5.0/5.0 stars **Reviewed by:** Yogesh T. | Head of Design, Small-Business (50 or fewer emp.) **Reviewed Date:** December 19, 2024 **What do you like best about Customer.io?** I love the workflows, AB test feature, reporting feature and integration with Slack. It is easy to use and implement, makes life easier **What do you dislike about Customer.io?** It's not much, but it would be great if a tool could test and see how your email will look in different OS and Email Clients. **What problems is Customer.io solving and how is that benefiting you?** Before we were using costome made email which was not much flexible, with customer.io it makes life easy to add new templates, do the AB test, tracking, analytics and work flows to automate many tasks. ### 35. Great tool with lots of opportunitiues **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Health, Wellness and Fitness | Small-Business (50 or fewer emp.) **Reviewed Date:** May 23, 2025 **What do you like best about Customer.io?** You can do a lot of personalization and segmentations **What do you dislike about Customer.io?** It is not always intuitive and getting data connected can be challenging. **What problems is Customer.io solving and how is that benefiting you?** It gives me the opportunities to personalize my campaigns and broadcast based on customer behavior. This is helping a lot in terms of retention. ### 36. Customer.io Review - Corey **Rating:** 4.0/5.0 stars **Reviewed by:** Corey R. | Digital Activation Specialist, Mid-Market (51-1000 emp.) **Reviewed Date:** February 21, 2025 **What do you like best about Customer.io?** The ability to create your eblasts, the ease and simple process. Creating new broadcasts drafts, segments, and activity logs are awesome. **What do you dislike about Customer.io?** I wish I could send an email to multiple dates without having to duplicate. **What problems is Customer.io solving and how is that benefiting you?** A place to send promotional emails. This is benefiting me because the platform is nice and easy. ### 37. Great features with even greater customer support **Rating:** 4.0/5.0 stars **Reviewed by:** Aishwarya P. | Marketing Specialist, Mid-Market (51-1000 emp.) **Reviewed Date:** February 28, 2025 **What do you like best about Customer.io?** A wide range of integrations and top-notch customer service. The platform is also very easy to use. **What do you dislike about Customer.io?** Data clean up can be a problem sometimes. **What problems is Customer.io solving and how is that benefiting you?** Creating personalized messaging for existing customers and creating segments to effectively upsell and cross sell products to these segments based on their needs. ### 38. Customer.io - Review **Rating:** 3.0/5.0 stars **Reviewed by:** Pieter-Jan L. | Product Owner, Mid-Market (51-1000 emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** Flexible tool. Easy to use and really helpfull for us to send transactional e-mails that are easily maintained. **What do you dislike about Customer.io?** Ability to track clicks or clickthrough rate. Open rate is also not entirely 100% accurate sometimes... Delivery vs . open rate is sometimes not reported correctly. **What problems is Customer.io solving and how is that benefiting you?** Sending and delivering e-mails to our customers. ### 39. Customer.io is unintuative **Rating:** 1.0/5.0 stars **Reviewed by:** Verified User in Marketing and Advertising | Small-Business (50 or fewer emp.) **Reviewed Date:** February 19, 2025 **What do you like best about Customer.io?** I like that it works well with other programs. **What do you dislike about Customer.io?** It is unintuitive. For anyone whose full-time job is not emails and wants to use Customer.io, you can expect major issues and a huge learning curve to the point where almost all features are unusable. Nurture campaigns or complex sequences are so difficult to learn and are always changing, so they are basically unusable. Their support team is unhelpful with answering any questions - it feels like most things are gatekept. **What problems is Customer.io solving and how is that benefiting you?** Customer.io helps automate things and create email campaigns. **Official Response from Rachel Welt:** > Thank you for your review and feedback. I have escalated your concerns to our Director of Technical Support. If you email support@customer.io and reference your G2 review, she would be happy to discuss your experience further so we can address your concerns directly. ### 40. Just started using customer.io from last 2 weeks only, good experience so far. **Rating:** 3.5/5.0 stars **Reviewed by:** Gajendra G. | Head of Growth, Small-Business (50 or fewer emp.) **Reviewed Date:** February 20, 2025 **What do you like best about Customer.io?** Make changes & modify according to requirements, we don't have to depend on dev/tech team. **What do you dislike about Customer.io?** After updating the lead status, I have to go multiple times to excess the list if I am going directly I have to again select the filters. **What problems is Customer.io solving and how is that benefiting you?** Managing the lead pipeline & follow-up on time. ### 41. Flexible and affordable **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Computer Software | Mid-Market (51-1000 emp.) **Reviewed Date:** May 23, 2025 **What do you like best about Customer.io?** Flexible, powerful and easy to use. Multi-channel. Their support team is super responsive and helpful **What do you dislike about Customer.io?** The visual builders for email and inapps are not the best **What problems is Customer.io solving and how is that benefiting you?** Sending ad hoc communications, and managing lifecycle communications. It allows us to build personalised multi-channel campaigns ### 42. Customer.io Makes Email Marketing a Breeze **Rating:** 4.0/5.0 stars **Reviewed by:** Verified User in Consumer Services | Mid-Market (51-1000 emp.) **Reviewed Date:** November 25, 2024 **What do you like best about Customer.io?** I've been using Customer.io for a while now, and it’s been a game-changer for managing email campaigns. The segmentation options are super flexible, and the automation tools make setting up workflows so easy. I also love how well it integrates with other tools we use. It did take a little time to get the hang of everything at first, but now I can’t imagine working without it. If you’re serious about personalized, data-driven marketing, this is definitely worth checking out! Customer support is quick and super helpful with a dedicated AM. **What do you dislike about Customer.io?** The platform does have some limited reporting capabilities **What problems is Customer.io solving and how is that benefiting you?** Customer.io helps me create personalized, automated email campaigns effortlessly. Its segmentation and workflows save time, while analytics improve campaign performance. It’s a game-changer for efficient, targeted marketing. ### 43. A simple to use and powerful tool **Rating:** 3.5/5.0 stars **Reviewed by:** Tom B. | Non Executive Director, Small-Business (50 or fewer emp.) **Reviewed Date:** March 10, 2025 **What do you like best about Customer.io?** Very easy to use and setup. Works well for triggered and broadcast emails. **What do you dislike about Customer.io?** The customer view is basic. You could gather much more information about each of your customers if this view was improved. **What problems is Customer.io solving and how is that benefiting you?** Triggered and broadcast emails ### 44. Regardless of price, best email automation tool **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in Financial Services | Small-Business (50 or fewer emp.) **Reviewed Date:** February 19, 2025 **What do you like best about Customer.io?** Customer.io makes it super easy to create email sequences and test. I've found it to be super full featured and much easier to use than other enterprise tools. **What do you dislike about Customer.io?** I've not come upon many, if any issues with customer.io. It's more that not many people have heard about the product so they think it's risky to take on a product they've never used before. **What problems is Customer.io solving and how is that benefiting you?** We needed to nurture leads for our B2B business and having such an easy tool to use helps us all. ### 45. Enjoy customer.io but still working to understand how to manage through platform kinks/glitches **Rating:** 4.0/5.0 stars **Reviewed by:** Claire S. | Marketing Director, Mid-Market (51-1000 emp.) **Reviewed Date:** February 19, 2025 **What do you like best about Customer.io?** Ability to navigate through all elements of the platform **What do you dislike about Customer.io?** Design elements, both in CSS and HTML have many kinks and errors that are sometimes difficult to solve, especially when it comes to dynamic functionality in messages. **What problems is Customer.io solving and how is that benefiting you?** Great in personalizing messages to different audience segments ### 46. An incredible tool for building out your customer journeys **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Music | Mid-Market (51-1000 emp.) **Reviewed Date:** September 13, 2023 **What do you like best about Customer.io?** The ability to create complicated, and very detailed campaigns based on different conditions, attributes, and events. **What do you dislike about Customer.io?** The drag-and-drop builder uses a ton of code (email cut-offs happen sometimes). I would also love to be able to save default metrics when analyzing campaigns. The new campaign builder isn't as user-friendly as the old one. **What problems is Customer.io solving and how is that benefiting you?** It enables us to automate our email marketing at a high level. We've been able to integrate our product data with c.io and that allows us to engage many different segments with personalized messaging. ### 47. Works well, and more **Rating:** 4.5/5.0 stars **Reviewed by:** Verified User in Financial Services | Mid-Market (51-1000 emp.) **Reviewed Date:** October 01, 2024 **What do you like best about Customer.io?** The segments. Thanks to the different segments, I can communicate clearly to a specific target of customers. Seeing in real time the click rate, and the opening rate of emails sent is very useful. The learning curve is also reasonable. I had never used Customer.io before, but I learned how to use it in a few days. **What do you dislike about Customer.io?** Nothing serious. I would like the UI more if it were more colourful. **What problems is Customer.io solving and how is that benefiting you?** I can identify potential problems with clients who never open emails > are they still working with their company? have they churned? and contact them to find out more. In our team, we also use it to send update emails to our customers about new features and urgent and important information about their account (outstanding loans, etc.). Customer.io makes it easy for us to automatically send emails to those clients at regular interval, as our segments are also automatically updated. ### 48. An Okay too to combine CX and CRM **Rating:** 2.5/5.0 stars **Reviewed by:** Verified User in Health, Wellness and Fitness | Mid-Market (51-1000 emp.) **Reviewed Date:** July 30, 2025 **What do you like best about Customer.io?** Cheap, easy to use, friendly interface, combination of CX and CRM in one platform **What do you dislike about Customer.io?** Bad reporting, CS is not great, no advanced features **What problems is Customer.io solving and how is that benefiting you?** Sending the right message at the right moment to boost retention and form a relationship ### 49. Great and easy way to manage customer outreach **Rating:** 5.0/5.0 stars **Reviewed by:** Verified User in E-Learning | Small-Business (50 or fewer emp.) **Reviewed Date:** January 14, 2025 **What do you like best about Customer.io?** Transactional messages with the easy to make template and API call triggering, followed by a robust way to check for delivery or failure of the call. Customer data management, and easy to integrate, implement and debug. **What do you dislike about Customer.io?** I think its great, for the moment I havent found a bad feature or something I dislike. **What problems is Customer.io solving and how is that benefiting you?** Customer IO is my way of interacting with the users of our application either through email or push notifications, we can build the templates and create the API calls to integrate with our app so we can communicate with our users and create engagement. ### 50. Best CDP/MAP Platform I've Used **Rating:** 5.0/5.0 stars **Reviewed by:** Jason S. | Director of Product & Growth, Credit Card, Small-Business (50 or fewer emp.) **Reviewed Date:** February 19, 2025 **What do you like best about Customer.io?** Easy to use and has a tone of flexible features and capabilities out of the box. **What do you dislike about Customer.io?** Managing customer profiles, search, and filters could be better. Data quality management and controls could be better. **What problems is Customer.io solving and how is that benefiting you?** We leverage for omni-channel communications, including direct mail. ## Customer.io Discussions - [Is it available in Bangladesh?](https://www.g2.com/discussions/is-it-available-in-bangladesh) - 1 comment, 2 upvotes - [What is the best way to make automations a smoother process?](https://www.g2.com/discussions/what-is-the-best-way-to-make-automations-a-smoother-process) - 1 comment, 1 upvote - [how is this site for mails?](https://www.g2.com/discussions/36887-how-is-this-site-for-mails) - 1 comment, 1 upvote - [What is Customer.io used for?](https://www.g2.com/discussions/what-is-customer-io-used-for) - 2 comments - [View Customer.io pricing details and edition comparison](https://www.g2.com/products/customer-io/reviews?page=54&qs=pros-and-cons§ion=pricing&secure%5Bexpires_at%5D=2026-08-01+15%3A29%3A38+-0500&secure%5Bsession_id%5D=9eec7343-d373-43ac-be4d-e0eae3ebec89&secure%5Btoken%5D=2d007691466c3e2c2d03cdbbf877efcde31d9d0bbc0af0eee72fd34621d5ef01&format=llm_user) ## Customer.io Integrations - [Agentforce Sales (formerly Salesforce Sales Cloud)](https://www.g2.com/products/agentforce-sales-formerly-salesforce-sales-cloud/reviews) - [Agentforce Service (formerly Salesforce Service Cloud)](https://www.g2.com/products/agentforce-service-formerly-salesforce-service-cloud/reviews) - [Amazon Simple Storage Service (S3)](https://www.g2.com/products/amazon-simple-storage-service-s3/reviews) - [Amazon Virtual Private Cloud (Amazon VPC)](https://www.g2.com/products/amazon-virtual-private-cloud-amazon-vpc/reviews) - [Amplitude Analytics](https://www.g2.com/products/amplitude-analytics/reviews) - [Android](https://www.g2.com/products/android/reviews) - [Apple iOS](https://www.g2.com/products/apple-ios/reviews) - [AWS Data Pipeline](https://www.g2.com/products/aws-data-pipeline/reviews) - [Claude](https://www.g2.com/products/claude-2025-12-11/reviews) - [Claude Code](https://www.g2.com/products/anthropic-claude-code/reviews) - [Claude for Slack](https://www.g2.com/products/claude-for-slack/reviews) - 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[Typeform](https://www.g2.com/products/typeform/reviews) - [Union](https://www.g2.com/products/union-ai-union/reviews) - [Upmetrics](https://www.g2.com/products/upmetrics/reviews) - [Visual Studio](https://www.g2.com/products/visual-studio/reviews) - [WhatsApp Business Platform](https://www.g2.com/products/whatsapp-business-platform/reviews) - [WordPress.com](https://www.g2.com/products/wordpress-com/reviews) - [Zapier](https://www.g2.com/products/zapier/reviews) - [Zendesk for Customer Service](https://www.g2.com/products/zendesk-for-customer-service/reviews) ## Customer.io Features **Email Marketing** - Building and Personalizing Emails - Sending Outbound Emails - Manage Email Deliverability - Automated Email Responses **Online Marketing** - Landing Pages and Forms - Dynamic Content - A/B Testing - Mobile Optimized **Administration** - Template Creation - Preset Template Availability - Custom Unsubscribe - Email Segmentation - Detailed Server Logs - Notifications **Campaigns** - Customize - Scheduling - Retarget - Segmentation - Triggered Notifications **Text Messaging** - Bulk SMS - Text Scheduler - Automatic URL Shortening - MMS Marketing - Personalization - Transactional SMS **Data Sourcing** - Data Enrichment - Expandability - Content Marketing - Multiple Devices **Agentic AI - Personalization** - Autonomous Task Execution - Cross-system Integration - Adaptive Learning - Natural Language Interaction - Proactive Assistance - Decision Making **Lead Management** - Marketing Lead Database - Data Quality Management - Segmentation - Lead Scoring and Grading - Lead Nurturing - Online Behavior Tracking - Automated Alerts and Tasks - CRM Lead Integration **Integrations** - Webhooks - Event Tracking API - Mail Send API - Spam Filter Testing **Analysis** - Campaign Analysis - Uninstall Tracking **Analytics** - Campaign Performance - Audience Insights **Intelligence** - Marketing Metrics - Predictive Modeling - Recommendation Engine **AI Personalization - Personalization** - Predictive Recommendations - Audience Segmentation - Adaptive Content **Campaign Management** - Program Management - Event / Webinar Marketing **Platform** - Custom Tracking Domain - Multiple Domains - Dedicated IP - Documentation - Sender Reputation Management - Tracking & Reporting - Enterprise Scalability - Performance and Reliability **Campaigns** - Proximity Marketing - Push Notifications - Bulk SMS - Email Campaigns - Audience Segmentation **Optimization** - A/B Testing - Personalization - Rich Notifications - Integrations **Social** - Social Sharing **Engagement** - Coupons and Promotions **SMS Platform** - Reporting - Automation - White Label - Text-to-Landline - Short Codes - API Integration **Agentic AI - Push Notification** - Autonomous Task Execution - Adaptive Learning - Proactive Assistance **Reporting & Analytics** - Basic Reporting - Web Analytics - ROI Analytics - Revenue Analytics **Platform** - Optimization - Internationalization **Agentic AI - SMS Marketing** - Autonomous Task Execution - Multi-step Planning - Cross-system Integration - Natural Language Interaction - Proactive Assistance - Decision Making **Platform** - Customization - Workflow Capability - User, Role, and Access Management - Internationalization - Sandbox / Test Environments - Performance and Reliability - Output Document Generation **Agentic AI - Mobile Marketing** - Autonomous Task Execution - Multi-step Planning - Cross-system Integration - Adaptive Learning - Proactive Assistance - Decision Making **AI Automation - SMS Marketing** - AI SMS **Agentic AI - Marketing Automation** - Autonomous Task Execution - Multi-step Planning - Cross-system Integration - Adaptive Learning - Proactive Assistance - Decision Making **AI Content Generation - SMS Marketing** - AI SMS **Integration** - Data Import & Export Tools - Integration APIs - Breadth of Partner Applications ## Top Customer.io Alternatives - [Iterable](https://www.g2.com/products/iterable/reviews) - 4.4/5.0 (814 reviews) - [Braze](https://www.g2.com/products/braze/reviews) - 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