Open source alternatives to Mailgun

3 open source projects replace Mailgun, ranked by how safe each is to depend on.

74 · Stable

Email sending service with an API, SMTP, domain management and campaigns, running on Amazon SES.

AGPL-3.0★ 4.7kLast commit 30 days ago

71 · Stable

Email delivery service that lets your apps send through an HTTP API, with templates, delivery tracking and analytics.

AGPL-3.0Relicensed 2026★ 521Last commit 5 days ago

65 · Stable

Mail delivery platform for sending transactional email from your own servers.

Free to useMIT★ 17kLast commit 8 days ago

74 · Stable

71 · Stable

At a glance

Health and license are separate verdicts: a project can be well maintained and still not be open source.

Project	Health	License	Stars	Last commit
useSend	74 · Stable	Free, share hosted changesAGPL-3.0	4.7k	30 days ago
Posta	71 · Stable	Free, share hosted changesAGPL-3.0Relicensed 2026	521	5 days ago
Postal	65 · Stable	Free to useMIT	17k	8 days ago

Mailgun is a paid email marketing product. See all open source email marketing tools, ranked the same way.

Scores last refreshed from GitHub on 9 October 2026. How we score.