Postal
postalserver/postal
An open-source alternative to Mailchimp and Sendinblue.
📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail (from the repository)
- Stars
- 16,874
- Licence
- MIT
- Last push
- 2026-10-06
- Written in
- Ruby
Is it alive?
Four readings from the repository, each with the rule behind it. No blended score.
Activity
Active
Last push 21 days ago
Active: pushed within 90 days. Slowing: within a year. Quiet: longer.
Releases
Recent
3.3.7, 5 months ago
Recent: a tagged release within six months. Some projects ship from the main branch and never tag.
Issues
97% closed
50 open · 1,638 closed
Share of all issues ever filed that are now closed. Under 20 issues is too few to read.
Momentum
+25 in 9 days
16,874 stars
Change in stars across our daily readings, over up to 30 days. Needs a week of readings.
What a business may do with it
PermissiveMIT
Use, change and sell it, including inside a closed product. Keep the copyright notice.
This describes the licence family GitHub identified, not legal advice about this project. The repository’s own LICENSE file is what binds you.
Run it yourself
Postal’s README does not show a docker run, docker compose up or helm install in a code block, so this page will not guess one. It may be a desktop app, a library, or documented on its website.
Postal against the other open-source options
Every project offered against Mailchimp and Sendinblue, most-starred first.
| Project | Stars | Activity | Licence | Self-host | Language |
|---|---|---|---|---|---|
 Listmonk | 23,840 | Active | Network copyleft | Compose | Go |
 Postal (this page) | 16,874 | Active | Permissive | ○ | Ruby |
 Mautic | 10,797 | Active | Not identified | ○ | PHP |
 Keila | 2,238 | Active | Network copyleft | ○ | Elixir |
 Sendportal | 2,175 | Active | Permissive | ○ | PHP |
Where this page comes from
- Stars, licence, activity, issues, releases and the self-host command are read from the repository. 2026-10-19
- The pairing with Mailchimp and Sendinblue and the category come from opensourcealternative.to, a community directory of open-source alternatives. We re-read it weekly.
- Star momentum comes from our own daily readings of the repository. How we collect data