Spectrum 2
Spectrum 2 is an open-source, self-hosted app in the Team Chat category, licensed GPL-3.0 and written mainly in C++. It has 421 GitHub stars and its last commit was on Oct 24, 2026 (data as of Oct 26, 2026).
GitHub stats
- GitHub stars
- 421
- Forks
- 93
- Open issues
- 19
- Commits, last 12 months
- 90
- Last commit
- Oct 24, 2026
- Latest release
- 2.2.1Jun 12, 2023
- Created
- Feb 10, 2011
- License
- GPL-3.0Open source
Data as of from the GitHub API. Report an error
Project health
ActiveActive: last commit Oct 24, 2026, 90 commits in 12 months.
| Last commit | Oct 24, 2026 |
|---|---|
| Commits, last 12 months | 90 |
| Latest release | 2.2.1 (Jun 12, 2023) |
| Releases, last 12 months | 0 |
| Releases, all time | 20 |
| Open issues | 19 |
| Open pull requests | 3 |
| Good first issues | 0 |
| Contributing guide | No |
| Security policy | No |
| Created | Feb 10, 2011 |
Health as of , from the GitHub API. A label describes activity, not quality or security. How we label project health · Report a data error
About Spectrum 2
Spectrum 2 is an open source instant messaging transport. It allows users to chat together even when they are using different IM networks.
Description adapted from awesome-selfhosted (CC BY-SA 3.0). Source code: github.com/SpectrumIM/spectrum2.
Repository preview
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Is Spectrum 2 free and open source?
Yes. Spectrum 2 is open-source software released under the GPL-3.0 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 Spectrum 2 with Docker?
Spectrum 2 does not list an official Docker image. It installs natively (C++), so follow the install steps in its README or look for a community-maintained container.
What are the best alternatives to Spectrum 2?
Popular self-hosted alternatives to Spectrum 2 include Rocket.Chat, Novu and Mattermost.
Is Spectrum 2 actively maintained?
The most recent commit to Spectrum 2 was on Oct 24, 2026 with 90 commits in the past twelve months. The latest release is 2.2.1, published Jun 12, 2023. It had 19 open issues on GitHub. appsgit's project-health label for it is "Active" as of Oct 26, 2026.