MailerSend

MailerSend is a cloud-based transactional messaging service operated by MailerSend, Inc. It supports application-generated email through a REST API, SMTP relay, templates, and event webhooks.

The service also provides bulk email, inbound routing, email verification, activity tracking, DMARC monitoring, blocklist monitoring, transactional SMS, and WhatsApp messaging. It is designed for developers while offering visual tools for non-technical contributors.

MailerSend provides a RESTful email API with official libraries for cURL, Node.js, PHP, Laravel, Python, Ruby, Go, and Java. Developers can send raw HTML or text messages, use stored templates, add attachments, and personalize recipient data.

The platform includes SMTP relay, drag-and-drop template editing, dynamic templates, email tracking, webhooks, inbound routing, suppression management, domain authentication, email verification, and deliverability monitoring. Integrations include Zapier, Make, WordPress, WooCommerce, Firebase, Supabase, Slack, Laravel, Symfony, Magento, Pabbly Connect, and other developer tools.

MailerSend also supports transactional SMS for customers in the United States and Canada. WhatsApp messaging is available through a Meta Business integration, subject to the applicable account and messaging requirements.

MailerSend offers an approved Free plan with up to 500 emails per month. The Free plan includes the Email API, SMTP relay, webhooks, inbound routing, tracking, activity data, and multiple email editors, subject to plan limits.

The Hobby plan starts at $7 per month for 5,000 emails. The Starter plan starts at $35 per month for 50,000 emails, while the Professional plan starts at $110 per month for 50,000 emails. Enterprise pricing is custom.

New accounts can test Professional features for 14 days. The trial does not automatically charge the customer and transfers to the Free plan when it ends unless the customer upgrades.

Pros:

• Provides both REST API and SMTP delivery options.
• Includes a free tier with 500 emails each month.
• Offers official SDKs for several programming languages.
• Combines templates, webhooks, inbound routing, and deliverability tools.
• Supports integrations for common developer, automation, and e-commerce platforms.

Cons:

• Account approval and sender verification can add onboarding steps.
• Advanced limits and retention periods vary substantially by plan.
• SMS availability is limited to customers in the United States and Canada.
• Professional and higher-volume plans cost more than entry-level plans.
• Independent reviews mention occasional account suspension and support delays.

Comparable alternatives include Postmark, Mailgun, SendGrid, Amazon Simple Email Service, Brevo, Resend, and Twilio SendGrid. Postmark and Resend focus strongly on developer-oriented transactional delivery. Mailgun and SendGrid provide broader email infrastructure and marketing capabilities. Amazon SES generally targets organizations prioritizing low-cost, programmable delivery.

Does MailerSend have a free plan?
Yes. Approved accounts can send up to 500 emails per month on the Free plan.

Does MailerSend offer a free trial?
Yes. MailerSend offers a 14-day trial of Professional features. The trial does not automatically convert into a paid subscription.

Does MailerSend provide an API?
Yes. MailerSend provides a RESTful Email API, official SDKs, API tokens, webhooks, and developer documentation.

Can MailerSend send email through SMTP?
Yes. SMTP relay is available, including on the Free plan, subject to its usage limits.

Which integrations does MailerSend support?
Official integrations include Zapier, Make, WordPress, WooCommerce, Firebase, Supabase, Slack, Laravel, Symfony, Magento, Pabbly Connect, and others.

Does MailerSend support SMS?
Yes. Transactional SMS API access is available for United States and Canada customers on eligible plans.

Does MailerSend support WhatsApp?
Yes. MailerSend provides WhatsApp messaging through a Meta Business integration.