Open source server projects
Every project in the registry tagged server, ranked by real GitHub adoption.
REST API for any Postgres database
Open-source mail server with unlimited sending & AI tools
BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: http
:cloud: ownCloud web server core (Files, DAV, etc.)
Self-hosted cloud platform with automated security
Headless CMS with automatic JSON API. Featuring auto-HTTPS from Let's Encrypt, HTTP/2 Server Push, and flexible server framework written in Go.
Enterprise file sync, share, and collaboration platform
Related tags
Frequently asked questions
How many open source server projects are there?
This registry tracks 7 projects tagged server, with 81,762 GitHub stars between them. The most-adopted is postgrest at 27,670 stars.
Are these server projects free to use?
Yes — 6 of the 7 carry an explicit open-source licence across 4 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which server project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these server projects still maintained?
4 of the 7 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.