head to head · open source
Nettacker vs crlfuzz
Nettacker has 5,614 GitHub stars, 1,184 forks, 249 open issues and last shipped yesterday. crlfuzz has 1,566 stars, 146 forks, 1 open issues and last shipped 26 days ago. Nettacker leads on adoption by 258% (5,614 vs 1,566 stars). Nettacker is written in Python under Apache-2.0; crlfuzz is written in Go under MIT. Nettacker has attracted 21% as many forks as stars, crlfuzz 9%. Nettacker 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
| Nettacker | crlfuzz | |
|---|---|---|
| GitHub stars | ★ 5.6K | ★ 1.6K |
| License | Apache-2.0 | MIT |
| Written in | Python | Go |
| Last push | 2026-09-22 | 2026-08-28 |
| Forks | ⑂ 1.2K | ⑂ 146 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick Nettacker if
- You weight community size — 5.6K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- 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 Nettacker
OWASP Nettacker is an open source, Python based automated penetration testing and information gathering framework for cyber security professionals and ethical hackers who need to run reconnaissance, vulnerability assessment, and network security audits efficiently.
read the full Nettacker 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 Nettacker or crlfuzz more popular?
Nettacker has 5,614 GitHub stars and crlfuzz has 1,566. Nettacker has the larger community by that measure.
Are Nettacker and crlfuzz free?
Both are open source. Nettacker is licensed under Apache-2.0 and crlfuzz under MIT. Neither carries a licence fee.
What is the difference between Nettacker and crlfuzz?
Nettacker is written in Python 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, Nettacker or crlfuzz?
Choose Nettacker if you want the larger community (5,614 stars) or its Apache-2.0 licence terms. Choose crlfuzz if its feature set, stack or MIT licence fits better. Both are self-hostable.