head to head · open source
Fluxer vs certspotter
Fluxer has 10,318 GitHub stars, 760 forks, 111 open issues and last shipped today. certspotter has 1,174 stars, 104 forks, 18 open issues and last shipped 7 days ago. Fluxer leads on adoption by 779% (10,318 vs 1,174 stars). Fluxer is written in TypeScript under AGPL-3.0; certspotter is written in Go under MPL-2.0. Fluxer has attracted 7% as many forks as stars, certspotter 9%. 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.
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Side by side
| Fluxer | certspotter | |
|---|---|---|
| GitHub stars | ★ 10K | ★ 1.2K |
| License | AGPL-3.0 | MPL-2.0 |
| Written in | TypeScript | Go |
| Last push | 2026-09-20 | 2026-09-13 |
| Forks | ⑂ 760 | ⑂ 104 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Fluxer if
- You weight community size — 10K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches TypeScript
- You value the larger contributor base for long-term maintenance
pick certspotter if
- You want the certspotter feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches Go
- You evaluated both and certspotter fits your workflow better
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 →
About certspotter
Cert Spotter is a lightweight, open source Certificate Transparency log monitor from SSLMate that watches Certificate Transparency logs and alerts you when an SSL/TLS certificate is issued for any domain on your watch list, aimed at site operators, security teams, and PKI administrators who need to catch unauthorized certificates without operating a database.
read the full certspotter overview →
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Frequently asked questions
Is Fluxer or certspotter more popular?
Fluxer has 10,318 GitHub stars and certspotter has 1,174. Fluxer has the larger community by that measure.
Are Fluxer and certspotter free?
Both are open source. Fluxer is licensed under AGPL-3.0 and certspotter under MPL-2.0. Neither carries a licence fee.
What is the difference between Fluxer and certspotter?
Fluxer is written in TypeScript and certspotter in Go. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, Fluxer or certspotter?
Choose Fluxer if you want the larger community (10,318 stars) or its AGPL-3.0 licence terms. Choose certspotter if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.