# Top Free Transactional Email Software - Page 5 ## How Many Transactional Email Software Products Does G2 Track? **Total Products under this Category:** 136 ### Category Stats (Jul 2026) - **Average Rating:** 4.41/5 (↑0.01 vs Jun 2026) The average rating of products in this category, based on all submitted ratings - **Top Trending Product:** Spotler SendPro (+1.75%) - Among all products in this category, Spotler SendPro recorded the largest rating increase compared to last month _Last updated: July 27, 2026_ ## How Does G2 Rank Transactional Email Software Products? **Why You Can Trust G2's Software Rankings:** - 30 Analysts and Data Experts - 31,700+ Authentic Reviews - 136+ Products - Unbiased Rankings G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category. ## G2 Grid® for Transactional Email Software ![G2 Grid® for Transactional Email Software plotting products by satisfaction and market presence](https://www.g2.com/categories/transactional-email/grids.png?focus%5B%5D=18316&focus%5B%5D=2764&focus%5B%5D=3435&focus%5B%5D=3644&focus%5B%5D=15592&focus%5B%5D=1759&focus%5B%5D=673&focus%5B%5D=159850) Highlighted products: Customer.io, Amazon Simple Email Service (Amazon SES), Brevo Marketing Platform, Omnisend, Email API, Dotdigital, Intuit Mailchimp Email Marketing, and Zoho ZeptoMail. Underlying data: [Grid® JSON](https://www.g2.com/categories/transactional-email/grids.json?focus%5B%5D=customer-io&focus%5B%5D=amazon-simple-email-service-amazon-ses&focus%5B%5D=brevo-marketing-platform&focus%5B%5D=omnisend&focus%5B%5D=netcore-private-limited-email-api&focus%5B%5D=dotdigital&focus%5B%5D=intuit-mailchimp-email-marketing&focus%5B%5D=zoho-zeptomail) **Sponsored** ### SAP Integrated Business Planning Respond to new market expectations with real-time supply chain planning capabilities and fulfill future demand profitably supply chain management. Powered by in-memory computing technology within SAP HANA, this cloud-based solution combines capabilities for sales and operations; demand, response, and supply planning; and inventory optimization. - Cloud deployment - Real-time scenarios and simulation - Social collaboration - Powerful predictive Analytics KEY BENEFITS: Achieve a rapid deployment Get up and running quickly with SAP Integrated Business Planning by using preconfigured process templates for an accelerated implementation. Empower employees with intuitive features Offer a unified, intuitive user experience with SAP Fiori and planning and simulation capabilities based on Microsoft Excel. Plan resources effectively Optimize resource efficiency by creating supply plans based on prioritized demands, allocations, and supply chain constraints. KEY CAPABILITIES: Integration with SAP Supply Chain Control Tower Gain end-to-end visibility of your supply chain, decision support, and fast corrective action through integration with SAP Supply Chain Control Tower. Forecasting and demand management Get full demand transparency with short-term, mid-term, and long-term forecasting. Take advantage of best-in-class capabilities for demand sensing and statistical forecasting. Inventory optimization Establish optimal inventory targets that enable you to maximize profits, while leaving a buffer to help you meet unexpected demand. Sales and operations planning Deliver a cross-departmental sales and operations plan that balances inventory, service levels, and profitability. Response and supply planning Optimize resourcing efficiency by creating supply plans based on prioritized demands, allocations, and supply chain constraints. [Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=ppc&secure%5Bad_slot%5D=category_product_list_llm&secure%5Bcategory_id%5D=225&secure%5Bchosen_at%5D=2026-07-31T15%3A36%3A35Z&secure%5Bdisplayable_resource_id%5D=134&secure%5Bdisplayable_resource_type%5D=Category&secure%5Bmedium%5D=sponsored&secure%5Bplacement_reason%5D=retargeted_product&secure%5Bplacement_resource_ids%5D%5B%5D=59587&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=59587&secure%5Bresource_id%5D=225&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Ftransactional-email%2Ffree%3Fpage%3D5&secure%5Btoken%5D=ee81bb3e2e5a424c3361a1d7502085eb4f4124fe3231532417a1dbfc28f29c0a&secure%5Burl%5D=https%3A%2F%2Fwww.sap.com%2Fdocuments%2F2025%2F04%2F5256c341-007f-0010-bca6-c68f7e60039b.html%3Fcampaigncode%3DCRM-YD25-DSC-407451%26source%3DIBP-click-campaign-G2&secure%5Burl_type%5D=custom_url) ### [Lettermint](https://www.g2.com/products/lettermint/reviews) Lettermint is a European-based transactional email service provider that helps businesses ensure their critical emails—like order confirmations, password resets, and notifications—reliably reach their customers' inboxes. Operating entirely within the EU, Lettermint combines GDPR-compliant infrastructure with developer-friendly tools including robust APIs, SDKs, and SMTP relay services. The platform stands out for its commitment to deliverability, privacy-focused analytics, and transparent pricing, making it an ideal choice for European businesses and developers who need a trusted partner for their transactional email needs. With support for multiple domains and scalable plans from free tier to enterprise, Lettermint simplifies email delivery while maintaining the highest standards of data protection and compliance. #### Who Is the Company Behind Lettermint? - **Seller:** [Lettermint](https://www.g2.com/sellers/lettermint) - **Year Founded:** 2025 - **HQ Location:** Zwolle, NL - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=a673093a8f46036e951ba3dc245a1b002fba801edf16fd4451b5166bf5577fde&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Flettermint%2F&secure%5Burl_type%5D=linkedin_company_website) 2 employees on LinkedIn® ### [Mailsoftly](https://www.g2.com/products/mailsoftly/reviews) Mailsoftly is an email marketing and automation platform built for small businesses, nonprofits, professional services firms, consultants, and government and public-sector institutions. Build segmented contact lists, personalize your campaigns, and automate your whole customer lifecycle from one simple dashboard, with real people ready to help when you need them. What keeps Mailsoftly customers is not a longer feature list. It is the things that actually matter day to day: Real human support. Fast, helpful, and included. We even help you set up and review your first campaign for free. Deliverability handled for you. We set up your email authentication (SPF, DKIM, DMARC) and monitor your sender reputation, so your emails reach the inbox instead of the spam folder. Genuinely easy to use. Capable enough for advanced campaigns, simple enough that you do not need a marketing operations team to run it. Pricing that stays sane as you grow. Fair pricing that does not balloon the moment your contact list does. Automation without the complexity. No-code conditional logic, smart workflows, and AI assistance where it genuinely helps. Nonprofits and associations receive a 20 percent discount. For nonprofits and government and public-sector teams, we support purchase orders, invoicing, and contracts for organizations that cannot pay by card. Mailsoftly is GDPR and KVKK compliant. Main features: Contact Segmentation Email Lists Personalized Email Bulk Actions Detailed Statistics Email Design Industry Email Templates Email Automation Email Testing Email Parser Email Collector Integrations: a native Shopify app, Zapier, WordPress, and Google Workspace, plus thousands of apps through Zapier. Whether you are sending a member newsletter, a donor appeal, a client update, a citizen notice, or a product announcement, Mailsoftly helps you reach the inbox and get a response, without the cost or the learning curve of enterprise tools. **Average Rating:** 4.9/5.0 **Total Reviews:** 4 #### Who Is the Company Behind Mailsoftly? - **Seller:** [Albert Solino](https://www.g2.com/sellers/albert-solino) - **HQ Location:** San Ramon, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=13e2de88509621e6bd019390e2c727ec98e532fbebc2294b9361ac25220f5f6c&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fmailsoftly&secure%5Burl_type%5D=linkedin_company_website) 9 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 100% Small #### What Do G2 Reviewers Say About Mailsoftly? _AI-generated summary from verified user reviews_ ##### Pros - Users value the **transparent analytics** of Mailsoftly, enabling clear insights into campaign performance and engagement. - Users love the **flexible automations** of Mailsoftly, simplifying email workflows and enhancing engagement effortlessly. - Users love the **flexible automations** that simplify setting up various email marketing sequences effortlessly. - Users love the **cost-effective** nature of Mailsoftly, enjoying great value while achieving excellent email deliverability. - Users praise the **top-notch customer support** from Mailsoftly, highlighting quick responses and effective assistance. #### What Are Recent G2 Reviews of Mailsoftly? **["Best Customer Support ever. It fully satisfied our requirements"](https://www.g2.com/survey_responses/mailsoftly-review-9095813)** **Rating:** 5.0/5.0 stars _— Eylem A._ [Read full review](https://www.g2.com/survey_responses/mailsoftly-review-9095813) **["Powerful, Easy-to-Use Email Platform with Excellent Support and Great Open Rates"](https://www.g2.com/survey_responses/mailsoftly-review-11088661)** **Rating:** 5.0/5.0 stars _— Uygar T._ [Read full review](https://www.g2.com/survey_responses/mailsoftly-review-11088661) ### [Muli](https://www.g2.com/products/flynner-muli/reviews) Muli is a no-code email automation platform built for Stripe users. It allows businesses to automatically send customized emails based on Stripe subscription and payment events. With an intuitive email builder and analytics, companies can manage transactional and lifecycle emails without backend development. #### Who Is the Company Behind Muli? - **Seller:** [Muli](https://www.g2.com/sellers/muli) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=7886df2ed926834e5eb248c77dcfa8e5c815d3ab1f0fe3132ced0dba45868834&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2FNo-Linkedin-Presence-Added-Intentionally-By-DataOps&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [Sendmux](https://www.g2.com/products/sendmux/reviews) Sendmux gives AI agents their own email inbox and a controlled way to send mail. Each agent can have a dedicated mailbox, read threads, handle attachments, send replies, and react to new messages through webhooks or Server-Sent Events. For teams building agents that need real email in production, that means fewer custom glue scripts and fewer fragile Gmail-style workarounds. Outbound email can run through Gmail OAuth, Outlook OAuth, SMTP providers, or managed Amazon SES. Teams can spread sending across providers with weighted routing, sender-domain routing, health checks, failover, and quotas by second, minute, hour, or day. That matters when one provider is not enough, or when customers already have approved sending infrastructure they want to keep using. Sendmux also gives developers the practical pieces around the inbox: Mailbox, Sending, and Management APIs, OpenAPI docs, SDKs for TypeScript, Python, Go, PHP, and Ruby, the sendmux CLI, MCP tools, and official Sendmux Skills for agent workflows. It is built for AI agent products, automation agencies, platform builders, support agents, scheduling agents, ops workflows, and controlled BYO-provider outbound email setups. Pricing is usage-based, with no per-seat or per-mailbox fees. #### Who Is the Company Behind Sendmux? - **Seller:** [Jonah and Associates](https://www.g2.com/sellers/jonah-and-associates-2026-06-26) - **HQ Location:** N/A - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=dfd81de0ff4b61240e3654091da2472d53330837e35ed32440182708cc8309db&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fsendmux&secure%5Burl_type%5D=linkedin_company_website) 1 employees on LinkedIn® ### [Userlist](https://www.g2.com/products/userlist/reviews) Customer messaging tool for SaaS companies. More efficient than building it yourself; less complex than Intercom. **Average Rating:** 5.0/5.0 **Total Reviews:** 2 #### How Do G2 Users Rate Userlist? - **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.0/10) #### Who Is the Company Behind Userlist? - **Seller:** [Userlist.io](https://www.g2.com/sellers/userlist-io) - **Year Founded:** 2017 - **HQ Location:** Atlanta, US - **LinkedIn® Page:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=9bffba84b71ea04c943ea11a664aef661d33e3d4cd422ce78194632d28df2002&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fuserlist%2F&secure%5Burl_type%5D=linkedin_company_website) 4 employees on LinkedIn® #### Who Uses This Product? - **Company Size:** 50% Large, 50% Small #### What Are Recent G2 Reviews of Userlist? **["Userlist is the best Email System Ever!"](https://www.g2.com/survey_responses/userlist-review-7298010)** **Rating:** 5.0/5.0 stars _— Tony W._ [Read full review](https://www.g2.com/survey_responses/userlist-review-7298010) **["A simple yet effective marketing automation tool for product led SaaS companies"](https://www.g2.com/survey_responses/userlist-review-9836460)** **Rating:** 5.0/5.0 stars _— Vinaya Kumar B._ [Read full review](https://www.g2.com/survey_responses/userlist-review-9836460) - [‹ Prev‹ Prev](/categories/transactional-email/free?order=g2_score&page=4#product-list) - [1](/categories/transactional-email/free?order=g2_score#product-list) - [2](/categories/transactional-email/free?order=g2_score&page=2#product-list) - [3](/categories/transactional-email/free?order=g2_score&page=3#product-list) - [4](/categories/transactional-email/free?order=g2_score&page=4#product-list) - 5 - Next ›Next › Spotlight Categories [SEO Tools](https://www.g2.com/categories/seo-tools) [Contact Center Software](https://www.g2.com/categories/contact-center) [CPQ Software](https://www.g2.com/categories/cpq) [Applicant Tracking Systems (ATS)](https://www.g2.com/categories/applicant-tracking-systems-ats) [Bot Platforms Software](https://www.g2.com/categories/bot-platforms) Similar Categories - [Account-Based Marketing](/categories/account-based-marketing) - [Affiliate Marketing](/categories/affiliate-marketing) - [App Store Optimization](/categories/app-store-optimization) - [Audience Intelligence Platforms](/categories/audience-intelligence-platforms) - [B2B Services Review Platforms](/categories/b2b-services-review-platforms) - [Blogger Outreach](/categories/blogger-outreach) - [Book Marketing Tools](/categories/book-marketing-tools) - [Brand Intelligence](/categories/brand-intelligence) - [Consumer Insights Platforms](/categories/consumer-insights-platforms) - [Consumer Video Feedback](/categories/consumer-video-feedback) - [Content Curation](/categories/content-curation) - [Content Marketing](/categories/content-marketing) - [Conversational Marketing](/categories/conversational-marketing) - [Conversion Rate Optimization Tools](/categories/conversion-rate-optimization-tools) - [Customer Data Platform (CDP)](/categories/customer-data-platform-cdp) [Browse Transactional Email Themes](/categories/transactional-email/themes)