I enjoy using ZeroBounce because it makes cleaning my email lists extremely easy! It also protects my sending score because it identifies "abuse" contacts, meaning people that report emails are identified so I can remove them from the list. Once I remove them, it makes it much more likely I'll land in the inbox and not the spam folder. Review collected by and hosted on G2.com.

The only issue I have with ZeroBounce is that once it validates the lists, it will create numerous lists (i.e. valid, catch-all, abuse contacts). As a result I have to then go in and manually remove the "abuse" contacts, I'd prefer if this step was simply automated in some fashion. Review collected by and hosted on G2.com.

My favorite part of working with ZeroBounce was meeting with a deliverability specialist who tailored recommendations specifically to our program. It gave us a strong understanding of email deliverability and a clear direction on how to use the platform effectively moving forward. Review collected by and hosted on G2.com.

At the time our project began, there were no Microsoft 365 seeds, and as a B2B/B2G software company, that was our main priority. However, it was resolved during the project. I would like more seeds in the future, but I can now be confident about our email delivery. Review collected by and hosted on G2.com.

I love that it integrates with Klaviyo allowing me to easily add tags and profile properties to my subscribers so I better understand my list. Review collected by and hosted on G2.com.

Expensive, but worth it! I find for a warm up period that the credits are expensive, however the monthly subscription price and credits makes sense for an ongoing basis. It would be nice if there was some sort of offer or collaboration between esps and zerobounce for when a customer is migrating and needs to clean their entire list. Review collected by and hosted on G2.com.

High accuracy & clean lists

ZeroBounce provides email validation in both bulk and single methods, and reviews generally mention accuracy of 96–99%, which significantly reduces hard bounces and spam-trap emails.

This improves sender reputation, enhances inbox placement, and increases the overall ROI of campaigns.

Real-time API and easy use

By integrating the real-time email validation API into sign-up forms, landing pages, or checkout, you can block invalid or risky emails from the start, preventing bad data from entering the list.

The dashboard and workflow are considered very user-friendly, and the integrations (ESP, WordPress, HubSpot, cloud storage, etc.) are also good, making it easy for non-technical teams to operate.

Extra deliverability tools

Not only validation, but also features like inbox placement testing, blacklist monitoring, server tester, DMARC monitoring, and email warmup are available, which strengthen the entire deliverability stack.

Due to data enrichment (appending name, location, etc.) and flexible pricing/credits, it becomes a practical option for enterprise to mid-size marketing teams. Review collected by and hosted on G2.com.

nothing i have found zero dislike for this best tool ever Review collected by and hosted on G2.com.

ZeroBounce has helped us verify and find professional emails for potential clients in our industry. It is accurate and we like that there are various ways to validate the prospective clients contacts. I especially like the Domain Search feature which helps in limiting the amount of guesses for a company's email format. The fact that you can do pay-as-you-go is really helpful for a small company like us. Review collected by and hosted on G2.com.

I wish there was a way to see all the previous searches - a sort of history we could download. Maybe I just haven't found it but, in any case, it's definitely not a deal breaker. Review collected by and hosted on G2.com.

I really find ZeroBounce helpful because it lets me check which emails don't work, so I can remove them. It shows all the different issues with each email, making it easier to decide if I should keep that address. I also appreciate their customer support. One time, I went to run a file but didn't have my monthly credits. The agent was able to resolve the issue immediately and even provided incentives. Setting up ZeroBounce was extremely easy for me, and I learned about it at the Guru Conference. Review collected by and hosted on G2.com.

I didn't have my January credits today, but that was resolved. Review collected by and hosted on G2.com.

I use ZeroBounce primarily for cleaning our email lists and contact databases, and I appreciate how it helps us identify outdated information and protects our domain reputation by avoiding the emailing of harmful addresses. The intuitive, easy-to-use interface makes processing straightforward, while the rapid turnaround speed ensures that I get instant results for single or small batches of emails, allowing me to distinguish correct emails from incorrect ones promptly. Moreover, the platform's results are incredibly accurate, which is crucial for maintaining the quality of my email communications. The customer support is exceptional; they are quick to respond and highly effective in solving any issues I encounter, making my experience smooth and efficient. Additionally, I found the initial setup to be very easy, with ample online documentation to guide me through its features. Overall, the reliability and speed of ZeroBounce significantly enhance my email management processes. Review collected by and hosted on G2.com.

I dislike the issue with greylisted emails as it causes delays. When I submit greylisted emails in a list, it takes time to produce results. Moreover, if I submit them through an individual search, it does not return a result. Review collected by and hosted on G2.com.

Warm-up domains, contact enrichment, and integration with Apollo.ai. Review collected by and hosted on G2.com.

It doesn’t happen often, but sometimes it fails after contact enrichment. Review collected by and hosted on G2.com.

What I like best about ZeroBounce is its high accuracy and reliability in identifying invalid, spam-trap, and risky email addresses. The platform is extremely easy to use, the reports are detailed, and the verification process is fast. Their built-in features—like AI email scoring, real-time validation, and activity data—make it much easier to maintain a clean email list and improve deliverability. Overall, it saves time, reduces bounce rates, and helps campaigns perform better. Review collected by and hosted on G2.com.

Pricing can be high for large lists, especially compared to budget-friendly competitors Review collected by and hosted on G2.com.

ZeroBounce has been a game-changer for our email marketing and marketing automation strategy. As a team that manages communications for multiple franchises and venues, email deliverability and audience trust are critical to our success. ZeroBounce’s validation tools have given us the confidence that the emails we send are reaching real, engaged inboxes.

One of the biggest advantages we’ve seen is when targeting past buyers for upcoming events. With ZeroBounce, we know we’re sending to clean, valid addresses, which not only improves engagement but also protects our sender reputation. That extra layer of assurance has helped us execute campaigns with greater precision and impact.

Beyond validation, ZeroBounce is intuitive, quick, and integrates seamlessly into our workflow. It’s a solution we trust, and it has become a key part of how we approach high-volume and high-stakes campaigns. I would highly recommend ZeroBounce to ANY team that relies on email as a primary channel for audience engagement. Review collected by and hosted on G2.com.

I don't have any dislikes! I'm obsessed with the product and its variety of tools as well as the confidence it gives us in executing the types of campaigns we do when ticket sales slump. Review collected by and hosted on G2.com.