Open source server projects
Every project in the registry tagged server, ranked by real GitHub adoption.
REST API for any Postgres database
🦔 Fast, lightweight & schema-less search backend. An alternative to Elasticsearch that runs on a few MBs of RAM.
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
Empowering everyone to host fast and efficient Minecraft servers
:cloud: ownCloud web server core (Files, DAV, etc.)
Catches mail and serves it through a dream.
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.
A general purpose HTTP reverse proxy and forwarding tool. Now written in Go!
The command-line tool for quick, simple deployment and management of Linux dedicated game servers.
A simple, modern server dashboard, primarily used by smaller private servers
Enterprise file sync, share, and collaboration platform
A free and open-source MMORPG server emulator written in C++
Canary Server 15.25 for OpenTibia community.
Related tags
Frequently asked questions
How many open source server projects are there?
This registry tracks 15 projects tagged server, with 140,686 GitHub stars between them. The most-adopted is postgrest at 27,739 stars.
Are these server projects free to use?
Yes — 14 of the 15 carry an explicit open-source licence across 7 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?
12 of the 15 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.