Open source alternatives to Postmark

3 open source projects replace Postmark, 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

70 · Stable

Email platform for SaaS products that combines transactional email, campaigns and automations on top of Amazon SES.

AGPL-3.0★ 5.5kLast commit yesterday

65 · Stable

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

Free to useMIT★ 17kLast commit 8 days ago

74 · Stable

70 · 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
Plunk	70 · Stable	Free, share hosted changesAGPL-3.0	5.5k	yesterday
Postal	65 · Stable	Free to useMIT	17k	8 days ago

Postmark 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.