head to head · open source
thc-hydra vs crlfuzz
thc-hydra has 12,296 GitHub stars, 2,669 forks, 50 open issues and last shipped 2 months ago. crlfuzz has 1,566 stars, 146 forks, 1 open issues and last shipped 26 days ago. thc-hydra leads on adoption by 685% (12,296 vs 1,566 stars). thc-hydra is written in C under AGPL-3.0; crlfuzz is written in Go under MIT. thc-hydra has attracted 22% as many forks as stars, crlfuzz 9%. crlfuzz 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
| thc-hydra | crlfuzz | |
|---|---|---|
| GitHub stars | ★ 12K | ★ 1.6K |
| License | AGPL-3.0 | MIT |
| Written in | C | Go |
| Last push | 2026-07-30 | 2026-08-28 |
| Forks | ⑂ 2.7K | ⑂ 146 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick thc-hydra if
- You weight community size — 12K stars and counting
- You want the AGPL-3.0 license terms
- Your stack matches C
- You value the larger contributor base for long-term maintenance
pick crlfuzz if
- You want the crlfuzz feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches Go
- You evaluated both and crlfuzz fits your workflow better
About thc-hydra
Hydra is an AGPL 3.0 licensed, C based login cracker that attacks dozens of network protocols in parallel, built for security researchers and penetration testing consultants who need to demonstrate how easily a remote system can be reached with weak credentials.
read the full thc-hydra overview →
About crlfuzz
CRLFuzz is a fast, MIT licensed command line tool written in Go that scans web targets for CRLF injection vulnerabilities, aimed at penetration testers, bug bounty hunters, and security engineers who need to check either a single URL or a long list of them quickly.
read the full crlfuzz overview →
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Frequently asked questions
Is thc-hydra or crlfuzz more popular?
thc-hydra has 12,296 GitHub stars and crlfuzz has 1,566. thc-hydra has the larger community by that measure.
Are thc-hydra and crlfuzz free?
Both are open source. thc-hydra is licensed under AGPL-3.0 and crlfuzz under MIT. Neither carries a licence fee.
What is the difference between thc-hydra and crlfuzz?
thc-hydra is written in C and crlfuzz 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, thc-hydra or crlfuzz?
Choose thc-hydra if you want the larger community (12,296 stars) or its AGPL-3.0 licence terms. Choose crlfuzz if its feature set, stack or MIT licence fits better. Both are self-hostable.