SMTPfast

An email sending API for developers that shows every message's path from queue to delivery, bounce or open.

smtpfa.st · Free plan

Visit smtpfa.st ↗would rather buy than build

Details

Anypost
An email sending API and SMTP service for apps sending large volumes of receipts, resets and alerts, with a vetted shared network.
Since 2026
Subscription · Transactional email · Developers
Helo
Email API and SMTP relay for sending app emails, priced on usage, from an independent self-funded team.
Since 2026
Pay as you go · Transactional email · Developers
Pidgeon
Gives AI agents their own email addresses and inboxes through an API, hosted in the EU, for developers building agents.
Since 2026
Free plan · Transactional email · Developers
Recivo
Gives each of your app's users their own email address and passes incoming mail and attachments to your code by API or webhook.
Since 2025
Free plan · Transactional email · Developers