Open-source alternatives to SendGrid

Business & Marketing · 3 free & open-source options

Looking to replace SendGrid with something free and open-source? These 3 tools are the best open alternatives in 2026 — most are self-hostable, so you keep full control of your data and pay no subscription.

Postal ›MIT
Full mail delivery platform you host yourself.
Full profile ›GitHub ↗
Listmonk ›AGPL-3.0
High-performance newsletter and mailing list manager.
Full profile ›GitHub ↗
Haraka ›MIT
Fast, plugin-based SMTP server in Node.js.
Full profile ›GitHub ↗

FAQ

What is the best open-source alternative to SendGrid?

The top open-source alternative is Postal — Full mail delivery platform you host yourself. The full ranked list is above.

Are these SendGrid alternatives free?

Yes. Every tool listed is open-source and free to use; most can be self-hosted so you keep full control of your data.

Can I self-host an alternative to SendGrid?

Most of these tools are designed to run on your own server or machine, giving you privacy and no subscription fees.

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