Open source alternatives to Resend

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

useSend

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

Plunk

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

Postal

65 · Stable

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

Free to useMIT★ 17kLast commit 8 days ago

Source-available and unverified licenses

The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.

Notifuse

68 · Stable

Newsletter, email marketing and transactional email platform with a visual MJML editor and several sending providers.

Free core, paid extrasBusiness Source License 1.1★ 2.2kLast commit 22 days ago

useSend

74 · Stable

Plunk

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
Notifuse	68 · Stable	Free core, paid extrasBusiness Source License 1.1	2.2k	22 days ago

More in Email marketing

Resend 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.