CrowdSec vs SafeLine
A side-by-side comparison of two self-hosted reverse proxy & gateways options — licensing, setup difficulty, resource needs, and what each one replaces.
CrowdSec
Collaborative open-source intrusion prevention system
VS
SafeLine
Self-hosted web application firewall with a web console
| Feature | CrowdSec | SafeLine |
|---|---|---|
| Deploy effort | Under-an-hour setup | Under-an-hour setup |
| Health score | 95 · Excellent | 96 · Excellent |
| Category | Reverse Proxy & Gateways | Reverse Proxy & Gateways |
| License | MIT | GPL-3.0 |
| Language | Go | Go |
| Setup difficulty | Medium | Medium |
| Min. RAM | 256 MB | 1,024 MB |
| Deployment | docker, binary | docker |
| GitHub stars | ★ 14,947 | ★ 22,669 |
| First released | 2020 | 2023 |
| Replaces | Cloudflare WAF, Fail2ban | Cloudflare WAF |
What are CrowdSec and SafeLine?
CrowdSec
CrowdSec is an open-source security engine that analyzes logs to detect and block malicious behavior, sharing threat signals across a community network. It is self-hosted with bouncers for proxies and firewalls.
- Behavior-based detection
- Community threat sharing
- Many bouncers
- Self-hostable
SafeLine
SafeLine is a self-hosted web application firewall that protects sites from common attacks using semantic analysis rather than rule signatures. It runs as a reverse proxy with a management console.
- Semantic attack detection
- Reverse proxy WAF
- Web management console
- Bot protection
CrowdSec vs SafeLine: key differences
Both projects are written in Go. Licensing differs — MIT for CrowdSec versus GPL-3.0 for SafeLine. CrowdSec is the lighter option, starting around 256 MB of RAM against 1,024 MB for SafeLine. CrowdSec is the more established project (first released 2020), while SafeLine arrived in 2023.
Why pick each one
Choose CrowdSec if…
- Community threat intelligence
- Modern Fail2ban successor
- Bouncers for many platforms
Watch out for
- Bouncers installed separately
- Console features paid
Choose SafeLine if…
- Semantic attack detection
- Clean web console
- Simple Docker install
Watch out for
- Some features paid
- Docs partly Chinese
Frequently asked questions
Is CrowdSec or SafeLine better?
Neither is universally better. SafeLine has the larger community; both share a medium setup difficulty, so the decision comes down to features and licensing.
Are CrowdSec and SafeLine free and open-source?
Yes. CrowdSec is licensed under MIT and SafeLine under GPL-3.0. Both can be self-hosted at no software cost.
Can I run CrowdSec and SafeLine with Docker?
CrowdSec: yes. SafeLine: yes.
Which is lighter on resources, CrowdSec or SafeLine?
CrowdSec has the smaller minimum footprint at 256 MB of RAM, compared to about 1,024 MB for SafeLine. Real-world usage depends on library size, user count, and enabled features.