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Is there a free or cheap transactional email API?

Yes: the Refresh Free plan sends 3,000 transactional emails a month, up to 100 a day, from unlimited sending domains at no charge. Paid sending starts at $20 a month for 50,000 emails, and Test keys let you build the integration without a real send.

What you get

  • The Free plan sends 3,000 emails a month and 100 a day, and the platform enforces both limits per recipient.
  • Paid transactional email starts at $20 a month for 50,000 emails.
  • Every plan, including Free, includes unlimited sending domains.
  • Every plan includes delivery, tracking and DMARC reporting.
  • A Test key keeps each send on the platform. Use it to test the integration before you mint a Live key.
  • Each recipient counts as one email, so a message to 10 addresses uses 10 from the allowance.
  • The SMTP relay on port 465 uses the same keys, limits and logs as the API.

How it works

  1. Sign up with Google or an email link. The first organization starts on the Free plan.
  2. Add your domain, publish its DNS records and wait for the Verified status.
  3. Mint a Test key and send a request to POST /emails.
  4. When the integration works, mint a Live key and change one environment variable.

Documentation

Create a free account: 3,000 emails a month, unlimited domains, no card.

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