MailerSend is a hassle-free transactional messaging service designed so that developers can integrate transactional email, SMS, and now WhatsApp quickly and effortlessly into their stack. Intuitively designed so anyone can contribute, with a powerful sending infrastructure and flexible payment plans that empower you to scale your sendings quickly. With over a decade of deliverability expertise, and inbuilt email verification, you can rest easy knowing your sender reputation will remain intact. As an official WhatsApp Business API partner, you can also skip the lengthy Meta integration process and start sending WhatsApp messages right from your MailerSend account. Plus, premium features including sender identities, dedicated IPs, and priority support make for an advanced, comprehensive solution.Get started for FREE with 500 emails per month, then upgrade for as little as $7/month for up to 5,000 emails! Want to try more? Get a 14-day free trial of our Professional plan and test-drive every feature it has to offer.
MailerSend, Inc. (mailersend.com) has 228 customer reviews on Five Star Index, with an average rating of 3.9 out of 5.
Also known as
MailerSend, mailersend.com
Website
mailersend.com
Category
Internet & Software
Location
New York, New York
Listed on Five Star Index
2026
About these reviews
Replies
The company replied to 55% of reviews.
Latest
Most recent review: October 2026.
Edits
Reviews are shown as their authors wrote them. The company can reply, but cannot edit them.
Score
This company cannot pay to remove reviews or change its score.
MailerSend is a serious company with helpful customer service who respond quickly and solve any problems that arise.
I can only recommend their service because they are the best in every way on the global market.
Thank you for making me a satisfied customer!
Response from MailerSend, Inc.Nov 7, 2025
Thank you so much, Lorand! We really appreciate your kind words and recommendation. It means a lot to know you’re such a happy customer!
AL
Alexandre
Don't waste a second on MailerSend!
Overall: bad programming, client troubleshoots the app, absurd requirements, useless app.
1) A potential client starts with a trial. However, sending the first email may or may not work. Why? The "Hello email" examples (caveat: not all of them), written in several programming languages / frameworks, lack one programming structure -- which is available to many, if not all, programming languages. And the lack of it means bad programming. After I add it, the reason for the failure becomes clear; and the trial feature becomes able to send emails -- however only to the main email address specified on the sign up. Which is next to nothing!
2) Afterwards, the client must upgrade, and so he must get approved by the company. In my case I wasn't, for three reasons, each more absurd than the other: i) Need to send a history of all emails sent, with another provider; ii) Need to send the invoices from the other provider; iii) Domain allegedly not online.
3) If you send few transactional emails per day, then a shared host with SMTP might provide for your email needs. No need to troubleshoot their app; no need to "get approved."
4) On the other hand, if you do need to send more emails, go for another service. Read Trust Pilot on the others, those may help!
I lost three hours of my life with MailerSend. I am not the only one. As it can be seen from the many other 1-star reviews -- an alarming 30%, as of this writing --, the damage could had been much worse.
Either: (i) The potential client is turned down early; or worse: (ii) The client is thrown out later, with some excuse like "your percentages are bad," or "our precious terms of service...," or "oh! You are a spammer," or "your website content ought to be as we say," or whatever.
None of such excuses will do any good to your business.
Bottom line is: go elsewhere!
Response from MailerSend, Inc.Nov 7, 2025
Hi Alexandre, thank you for sharing your experience. MailerSend requires account verification to ensure the security and reputation of our sending domains, which helps protect all users and maintain high deliverability rates.
We know it can feel restrictive at first, but these steps are in place to prevent abuse and ensure reliable service for every sender. We appreciate the time you took to share your feedback, and we’ll continue improving our onboarding process to make it as smooth as possible.
GI
Gianmel
I had an urgent issue accessing my MailerSend account due to a suspicious access
I had an urgent issue accessing my MailerSend account, and the support team — especially Cyro — responded quickly, clearly, and very professionally. They guided me step by step to secure the account and resolve the problem in no time.
I truly appreciate their efficiency, clear communication, and kindness throughout the process. I highly recommend MailerSend for their outstanding customer support and fast response times.
Response from MailerSend, Inc.Nov 7, 2025
Thank you so much, Gianmel! We’re so glad Cyro and the team could help you out quickly and make you feel supported through it all. We really appreciate your kind words and recommendation!
JO
Jonathan
Lacking transparency and poor support
The homepage where you can compare the plans does not state that there is a limit per minute for sending emails. I only received this information after placing my order.
Although they are very unclear about this, they do not want to give me a refund after I have paid. I cannot use the service like this, it is of no use to me.
Response from MailerSend, Inc.Oct 9, 2025
Hi Jonathan, we’re sorry the experience wasn’t what you expected. Rate limiting is a standard practice across all transactional email providers to ensure stable delivery for everyone. The details are available in our API documentation, but we agree it should be easier to find, we’ll work on improving that visibility.
Our team has been in touch to explain this further and offer a refund for the unused portion of your annual plan. We hope this helps, and we appreciate you taking the time to share your feedback.
RU
Rustam
Smooth, Easy to Use, Great Tech Support
When I first started looking into mailing service providers, I tested at least four different options. MailerSend stood out as the best. The documentation is clear and helpful, making it easy to get started, install, and integrate with your favorite platforms. The API is excellent, and the speed is outstanding.
What impressed me most recently is the support team—absolutely fantastic! Thank you, Mark! I’ve already recommended your service to a few friends and will definitely continue using it for future projects. Keep up the great work!
Response from MailerSend, Inc.Oct 9, 2025
Hi Rustam, thanks so much for the awesome review! 💙
We’re really glad MailerSend stood out for you and that everything has been smooth. It’s great to hear our documentation and API made things easier, and we’ll definitely share your kind words with Mark and the team.
We really appreciate the recommendations and are super happy to be part of your future projects!
JO
Jorge
Excelente soporte
He tenido una excelente respuesta del area de soporte. Rápida y efectiva.
Estoy conforme con la plataforma.
Response from MailerSend, Inc.Sep 23, 2025
Thank you so much, Jorge! We’re really glad our support team could help you quickly and effectively.
GO
Guillaume O.
My MailerSend has been blocked for just…
My MailerSend has been blocked for just 5 or 6 spamm complains, which is totally false, because my website is under construction and totally unknown from public. More stupid, i am using emails just for signup , contact form and password recovery. And i have no external user except my small team. This is a total insane behavior.. a good advise dont use this emai services, they are dangerous . their support are totally stupid, i never saw for alsmot 18 yeas of website exeprience
Response from MailerSend, Inc.Sep 23, 2025
Hi Guillaume, we understand this experience was frustrating. All new accounts are reviewed against our Terms of Service and Anti-Spam Policy to make sure MailerSend stays safe and reliable for everyone. When complaint thresholds are exceeded, we may need to suspend accounts to protect overall deliverability. You can read more about this here: https://www.mailersend.com/legal/terms-of-service
AK
Akira
Very quick and helpful customer support
The customer support team is very quick to respond to questions and are very helpful at resolving issues.
Response from MailerSend, Inc.Sep 23, 2025
Thanks so much for sharing, Akira! We’re glad our team could jump in quickly and get things sorted for you.