Email · head-to-head
mail.tm vs Sendinblue
mail.tm
mail.tm issues disposable inboxes on shared domains and exposes a Hydra/JSON-LD REST API to create accounts, fetch a bearer token, and read incoming messages, all without any signup fee. It's the fully free, actively maintained sibling of mail.gw.
Sendinblue
Sendinblue rebranded to Brevo in 2023, and its REST API still covers the same ground under the new name: transactional and marketing email, SMS, and contact/campaign management behind an API-key header. A free plan covers a daily email allowance before metered and subscription paid tiers.
| mail.tm | Sendinblue | |
|---|---|---|
| Authentication | None | API Key |
| Pricing | free | freemium |
| Formats | JSON | JSON |
| CORS | yes | yes |
| HTTPS | Yes | Yes |
mail.tm needs no API key, while Sendinblue requires API Key — pick mail.tm to start without signup.