# Free Email, SMS and Messaging APIs

Page: https://free-web-services.com/web-services/communication/

APIs to send e-mail, text messages, faxes, chat and push notifications from your own software, for example sign-up mails, alerts to your phone or messages to a team channel. Most have a free plan with a monthly limit; webhooks for Slack and Discord are free to use.

## Subcategories

- [Social media](https://free-web-services.com/web-services/communication/social-media/index.md): Post to and read from social networks and blogs

## Services

| Service | API key | Formats | Free use |
|---|---|---|---|
| [Brevo (Sendinblue) email API](https://free-web-services.com/web-services/communication/brevo-sendinblue-email-api.md) | - | JSON | The free plan allows 300 e-mails per day; paid plans remove that limit. |
| [Discord webhooks](https://free-web-services.com/web-services/communication/discord-webhooks.md) | - | JSON | Free; for two-way interaction use the full Discord bot API. |
| [InterFax](https://free-web-services.com/web-services/communication/interfax.md) | Needed, free | XML | Paid per page, with a free developer account for testing. |
| [Mailtrap](https://free-web-services.com/web-services/communication/mailtrap.md) | - | JSON | Free plan with 4,000 sent e-mails per month (at most 150 per day, one domain) and a testing sandbox with 50 e-mails per month; paid plans for more. |
| [Noteshred](https://free-web-services.com/web-services/communication/noteshred.md) | - | JSON | - |
| [ntfy](https://free-web-services.com/web-services/communication/ntfy.md) | - | - | Free on ntfy.sh, and open source so you can host it yourself. |
| [Phaxio](https://free-web-services.com/web-services/communication/phaxio.md) | - | JSON | Paid per page, with a free test mode. |
| [QConf Conference Calling API](https://free-web-services.com/web-services/communication/qconf.md) | Needed | - | - |
| [Resend](https://free-web-services.com/web-services/communication/resend.md) | - | JSON | The free plan allows 3,000 e-mails per month (at most 100 per day) and up to 3 domains; paid plans offer more. |
| [Seanox XMEX](https://free-web-services.com/web-services/communication/seanox-xmex.md) | - | - | - |
| [Slack incoming webhooks](https://free-web-services.com/web-services/communication/slack-incoming-webhooks.md) | - | JSON | Free, also on free Slack workspaces. |
| [Telegram Bot API](https://free-web-services.com/web-services/communication/telegram-bot-api.md) | - | JSON | Free. |
| [TheTexting](https://free-web-services.com/web-services/communication/the-texting.md) | - | JSON | - |

## Questions

**Are these email, SMS and messaging APIs really free?**  
The services here can be used without paying, at least on a free plan or free tier, often with limits such as a number of requests per day or non-commercial use only. The table above quotes what each service says about its free use; check the provider's own terms before you rely on it.

**How up to date is this list?**  
The address of every service is checked about once a week, and services that stop working or stop being free are removed. This list last changed on October 31st, 2026.