MailerSend

MailerSend is built around the API and SMTP relay a developer needs to send transactional email from an app, with templated emails, webhooks for delivery events, inbound email routing, and real-time activity logs available from the dashboard rather than buried in documentation. It's not built for broadcast newsletters, so don't expect a campaign editor or list-growth tools here.

Pricing runs by email volume sent, not by contacts, which makes sense for transactional traffic that doesn't map cleanly to a subscriber list. The free plan dropped in scope in a December 2025 update, now covering 500 emails a month with a 100-email daily cap and a credit card required at signup to prevent abuse, down from the more generous free Hobby tier it used to offer. The next tier up, Hobby, costs about $7 a month for 3,000 emails. It suits a developer or small SaaS product that needs reliable transactional sending without the overhead of a full marketing platform.