# Transactional email

> Send email from your app over an API or SMTP, such as signups, password resets and receipts.

Open a service for its limits, gotchas and setup steps.

- [Brevo](https://freetier.tech/s/brevo.md): Always free. 300 emails per day, shared between transactional email and campaigns. Commercial use allowed. No card required.
- [Mailgun](https://freetier.tech/s/mailgun.md): Always free. 100 emails per day with 1 custom sending domain and 1-day log retention. Commercial use not stated. No card required.
- [Resend](https://freetier.tech/s/resend.md): Always free. 3,000 transactional emails per month, capped at 100 per day, with up to 3 verified domains. Commercial use not stated. No card required.

JSON: https://freetier.tech/api/v1/categories/email.json