head to head · open source
crowdsec vs rengine
crowdsec has 15,510 GitHub stars, 757 forks, 296 open issues and last shipped 4 days ago. rengine has 8,927 stars, 1,346 forks, 164 open issues and last shipped 2 days ago. crowdsec leads on adoption by 74% (15,510 vs 8,927 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%. rengine 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 20902 open source comparisons
Side by side
| crowdsec | rengine | |
|---|---|---|
| GitHub stars | ★ 16K | ★ 8.9K |
| License | MIT | GPL-3.0 |
| Written in | Go | HTML |
| Last push | 2026-11-06 | 2026-11-08 |
| Forks | ⑂ 757 | ⑂ 1.3K |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick crowdsec if
- You weight community size — 16K 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: open source IDS/IPS, WAF and bot detection CrowdSec is an open source and participative security solution offering crowdsourced server detection and protection against malicious IPs. Detect and block with our Security Engine, contribute to the network, and enjoy our real time community blocklist. Features & Advantages Versatile Security Engine CrowdSec Security Engine is an all in one IDS/IPS and WAF. It detects bad behaviors by analyzing log sources and HTTP requests, and allows active remediation thanks to the Remediation Components. Detection rules are available on our hub under MIT license…
read the full crowdsec overview →
About rengine
reNgine: The Ultimate Web Reconnaissance & Vulnerability Scanner 🚀 reNgine 2.2.0 is released! reNgine 2.2.0 comes with bounty hub where you can sync and import your hackerone programs, in app notifications, chaos as subdomain enumeration tool, ability to upload multiple nuclei and gf patterns, support for regex in out of scope subdomain config, additional pdf report template and many more. Check out What's new in reNgine 2.2.0! What is reNgine? reNgine is your ultimate web application reconnaissance suite, designed to supercharge the recon process for security pros, pentesters, and bug bounty hunters. It is go…
read the full rengine overview →
More in Security & Privacy
Related comparisons
More Threat Detection & Response projects
Compare either of these against the rest of the Threat Detection & Response field.
Frequently asked questions
Is crowdsec or rengine more popular?
crowdsec has 15,510 GitHub stars and rengine has 8,927. 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 (15,510 stars) or its MIT licence terms. Choose rengine if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.