head to head · open source
Signal vs Fluxer
Signal has 29,352 GitHub stars, 6,888 forks, 498 open issues and last shipped yesterday. Fluxer has 10,299 stars, 758 forks, 111 open issues and last shipped yesterday. Signal leads on adoption by 185% (29,352 vs 10,299 stars). Signal is written in Kotlin under AGPL-3.0; Fluxer is written in TypeScript under AGPL-3.0. Signal has attracted 23% as many forks as stars, Fluxer 7%. Fluxer was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
← all 8884 open source comparisons
Side by side
| Signal | Fluxer | |
|---|---|---|
| GitHub stars | ★ 29K | ★ 10K |
| License | AGPL-3.0 | AGPL-3.0 |
| Written in | Kotlin | TypeScript |
| Last push | 2026-09-17 | 2026-09-17 |
| Forks | ⑂ 6.9K | ⑂ 758 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Signal if
- You weight community size — 29K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches Kotlin
- You value the larger contributor base for long-term maintenance
pick Fluxer if
- You want the Fluxer feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches TypeScript
- You evaluated both and Fluxer fits your workflow better
About Signal
Signal Android is a secure messaging application for Android devices that delivers private communication via end to end encryption. Developed by Signal Messenger, LLC, it operates within the broader Signal ecosystem, which includes official iOS and desktop clients. The app uses mobile data or Wi Fi to send and receive encrypted messages, voice calls, and video calls without relying on traditional SMS or telephony infrastructure.
read the full Signal overview →
About Fluxer
Fluxer is a free and open source instant messaging and VoIP chat application built for friends, groups, and communities. The project's tagline describes it as messaging with privacy and community focus, and the GitHub description repeats the same core purpose. The repository is written in TypeScript and is distributed under the AGPL 3.0 license.
read the full Fluxer overview →
More in Security & Privacy
Related comparisons
More Data Security & Privacy projects
Compare either of these against the rest of the Data Security & Privacy field.
Frequently asked questions
Is Signal or Fluxer more popular?
Signal has 29,352 GitHub stars and Fluxer has 10,299. Signal has the larger community by that measure.
Are Signal and Fluxer free?
Both are open source. Signal is licensed under AGPL-3.0 and Fluxer under AGPL-3.0. Neither carries a licence fee.
What is the difference between Signal and Fluxer?
Signal is written in Kotlin and Fluxer in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Signal or Fluxer?
Choose Signal if you want the larger community (29,352 stars) or its AGPL-3.0 licence terms. Choose Fluxer if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.