MailerSend review

MailerSend is a messaging service for apps that need to send transactional email, SMS and WhatsApp messages. The product supports email through an API or SMTP relay; SMS and WhatsApp messaging are also available, with WhatsApp sent through the WhatsApp Business API. It is aimed at operational messages such as account notifications and alerts, rather than being presented here as a general marketing-email platform.

Beyond sending, MailerSend offers email activity tracking, webhooks for triggering workflows or alerts, and email verification through its app or API, including bulk and real-time checks. Team features include role-based access control, two-factor authentication and SSO. The pricing page lists a free plan with 500 emails per month, the Email API and SMTP relay, email support and a drag-and-drop builder. Paid plans add higher sending limits and, depending on the tier, more users, domains, templates, API requests or activity-data retention.

The useful part of MailerSend is the combination of email delivery methods and operational tooling. Teams can send email through an API or SMTP relay, then use activity tracking and webhooks to follow delivery events or trigger downstream workflows. Email verification is available through the app or API, in bulk or in real time. SMS and WhatsApp extend the same messaging setup beyond email.

The free plan gives occasional senders 500 emails per month, access to the Email API and SMTP relay, email support and a drag-and-drop builder, according to the pricing page. Hobby is listed at $7 per month, or $5.60 per month billed yearly, with 5,000 emails, five seats, one domain, 10 templates and 1,000 daily API requests. Starter and Professional each list 50,000 emails per month; their listed differences include 100 versus 150 SMS per month, five seats versus unlimited users, and 100,000 versus 500,000 daily API requests. Professional is explicitly aimed at agencies and white-label resellers. Those caps make the tiers easier to compare against an app’s actual sending volume and team needs.

The free plan is limited to 500 emails per month, and the Hobby tier to 5,000. Starter and Professional list 50,000 emails each, so higher volumes mean checking the overage price: extra email is listed at $1.30 per 1,000 on those plans and $1.50 per 1,000 on Hobby. Starter includes 100 SMS per month; Professional includes 150. Phone numbers cost $2 each and are listed for the US and Canada only. Domain spaces cost $4 each, and activity-data retention starts at $5. WhatsApp and email-verification credit prices are not published on the vendor's site.

Plan prices for Starter and Professional are also not published there, so the included quotas alone do not show what those tiers will cost. A Reddit thread about using MailerSend for operational email raises support concerns: one user said MailerSend had not addressed automation for removing suppression-list entries, while additional debug information had remained “on the roadmap” for about a year. That is one user’s report, not proof of a general support problem, but it is worth weighing if suppression management or troubleshooting detail is central to your setup.

MailerSend has a free plan with 500 emails a month, plus Hobby at $7 monthly or $5.60 a month when billed yearly. The pricing page says annual billing saves 10%. Hobby raises the cap to 5,000 emails, but still limits you to five seats, one domain, 10 templates and 1,000 daily API requests. Activity data lasts one day.

The tier jump is hard to price: Starter and Professional prices are not published on the vendor's site. Both include 50,000 emails monthly; Starter includes 100 SMS, five seats and 10 domains, while Professional includes 150 SMS and unlimited users, domains and templates. Enterprise pricing is also not published. The page lists a 14-day free trial, but the published details don’t say what it covers.

Watch add-ons: extra emails cost $1.30 per 1,000 on Starter or Professional and $1.50 on Hobby; domain spaces are $4 each, and phone numbers are $2 each in the US and Canada. WhatsApp and email verification prices aren’t published. Activity retention starts at $5. No extra seat cost is listed.

MailerSend supports sending through an API or SMTP relay, with webhooks for delivery activity. Switching will mean updating the sending configuration in your app or service, then checking that your delivery events and any workflows still behave as expected. If you use the email builder, plan to review or recreate templates in the destination service; the published material doesn’t say whether MailerSend supports exporting them.

Treat portability as an open question before moving. Data export details—including what you can take with you for contacts, templates and activity history—aren’t published in the published sources. Confirm what you need to retain and how to export it before changing providers. Also check how you’ll replace verification, SMS or WhatsApp workflows if you use them; their pricing or migration details aren’t provided here.

We don’t have Reddit posts in the published material, so we can’t responsibly say what users tend to leave over or present a Reddit consensus. Ask departing users directly, and test the replacement against your own sending and event requirements before switching.