head to head · open source
crowdsec vs rengine
crowdsec has 14,956 GitHub stars, 719 forks, 296 open issues and last shipped yesterday. rengine has 8,860 stars, 1,344 forks, 164 open issues and last shipped 4 days ago. crowdsec leads on adoption by 69% (14,956 vs 8,860 stars). crowdsec is written in Go under MIT; rengine is written in HTML under GPL-3.0. crowdsec has attracted 5% as many forks as stars, rengine 15%. crowdsec 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
| crowdsec | rengine | |
|---|---|---|
| GitHub stars | ★ 15K | ★ 8.9K |
| License | MIT | GPL-3.0 |
| Written in | Go | HTML |
| Last push | 2026-09-24 | 2026-09-21 |
| Forks | ⑂ 719 | ⑂ 1.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick crowdsec if
- You weight community size — 15K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick rengine if
- You want the rengine feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches HTML
- You evaluated both and rengine fits your workflow better
About crowdsec
CrowdSec is an open source, MIT licensed intrusion detection and prevention system, WAF and bot detection engine that analyses logs and HTTP requests and blocks malicious IPs at the firewall, reverse proxy or CDN, built for Linux, Windows, Docker and Kubernetes operators who want community sourced threat intelligence sitting behind their own infrastructure.
read the full crowdsec overview →
About rengine
reNgine is an open source automated reconnaissance framework for web applications, built for penetration testers, bug bounty hunters and corporate security teams who need a configurable, repeatable recon process with the results correlated and stored in one place.
read the full rengine overview →
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Frequently asked questions
Is crowdsec or rengine more popular?
crowdsec has 14,956 GitHub stars and rengine has 8,860. crowdsec has the larger community by that measure.
Are crowdsec and rengine free?
Both are open source. crowdsec is licensed under MIT and rengine under GPL-3.0. Neither carries a licence fee.
What is the difference between crowdsec and rengine?
crowdsec is written in Go and rengine in HTML. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, crowdsec or rengine?
Choose crowdsec if you want the larger community (14,956 stars) or its MIT licence terms. Choose rengine if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.