Cosmos
Run server applications securely and with built-in privacy features. It acts as a secure gateway to your application, as well as a server manager.
- Self-hosting Platforms
- Go
- Apache-2.0
- Docker
- Actively maintained
GitHub stats
- GitHub stars
- 6,176
- Forks
- 249
- Open issues
- 166
- Commits, last 12 months
- 158
- Last commit
- Oct 5, 2026
- Latest release
- v0.23.4Aug 30, 2026
- Created
- Feb 11, 2023
Data from the GitHub API, refreshed daily.
About Cosmos
Run server applications securely and with built-in privacy features. It acts as a secure gateway to your application, as well as a server manager. Cosmos is open source under the Apache-2.0 license and written mainly in Go, so you can read the code, run it on your own hardware and keep full control of your data.
The project has 6,176 stars and 249 forks on GitHub, with 158 commits over the last year. It ships a Docker image, which makes it a good fit for a small VPS or a home server running Docker Compose.
Topics
- authentication
- cloud
- cosmos
- reverse-proxy
- security
- self-hosted
- self-hosting
- selfhosted
- selfhosting
- server
Open-source alternative to
Cosmos can replace these commercial products. Compare every option on each page.
Repository preview
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What is Cosmos?
Cosmos is a free, open-source app you can host on your own server, listed in our Self-hosting Platforms category. Run server applications securely and with built-in privacy features. It acts as a secure gateway to your application, as well as a server manager. The source code lives at github.com/azukaar/Cosmos-Server, where it has 6,176 stars.
Is Cosmos free and open source?
Yes. Cosmos is open-source software released under the Apache-2.0 license, so you can self-host it at no cost. You only pay for the server it runs on, and some projects also offer an optional paid cloud plan.
Can I run Cosmos with Docker?
Yes. Cosmos provides a Docker image, so you can run it on any Linux server with Docker and Docker Compose installed. The project README lists the image name and the environment variables to set.
What are the best alternatives to Cosmos?
Popular open-source alternatives to Cosmos include Coolify, Portainer and Dokploy. Cosmos itself is a self-hosted alternative to Heroku.
Is Cosmos actively maintained?
The most recent commit to Cosmos was on Oct 5, 2026 with 158 commits in the past twelve months. The latest release is v0.23.4, published Aug 30, 2026. Check the open issues on GitHub to gauge how quickly maintainers respond.