head to head · open source
ProjectDiscovery vs crlfuzz
ProjectDiscovery has 31,415 GitHub stars, 3,878 forks, 107 open issues and last shipped yesterday. crlfuzz has 1,566 stars, 146 forks, 1 open issues and last shipped 25 days ago. ProjectDiscovery leads on adoption by 1,906% (31,415 vs 1,566 stars). ProjectDiscovery is written in Go under MIT; crlfuzz is written in Go under MIT. ProjectDiscovery has attracted 12% as many forks as stars, crlfuzz 9%. ProjectDiscovery was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (vulnerability-scanner), so they are genuine substitutes rather than adjacent tools.
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
| ProjectDiscovery | crlfuzz | |
|---|---|---|
| GitHub stars | ★ 31K | ★ 1.6K |
| License | MIT | MIT |
| Written in | Go | Go |
| Last push | 2026-09-21 | 2026-08-28 |
| Forks | ⑂ 3.9K | ⑂ 146 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ProjectDiscovery if
- You weight community size — 31K stars and counting
- You want the MIT license terms
- Your stack matches Go
- 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 ProjectDiscovery
Nuclei is a high performance, open source vulnerability scanner built by ProjectDiscovery, part of the ProjectDiscovery ecosystem. It operates as a CLI tool using a simple YAML based DSL to define custom vulnerability checks, enabling precise, real world exploitation simulation to eliminate false positives.
read the full ProjectDiscovery 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 ProjectDiscovery or crlfuzz more popular?
ProjectDiscovery has 31,415 GitHub stars and crlfuzz has 1,566. ProjectDiscovery has the larger community by that measure.
Are ProjectDiscovery and crlfuzz free?
Both are open source. ProjectDiscovery is licensed under MIT and crlfuzz under MIT. Neither carries a licence fee.
What is the difference between ProjectDiscovery and crlfuzz?
ProjectDiscovery is written in Go 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, ProjectDiscovery or crlfuzz?
Choose ProjectDiscovery if you want the larger community (31,415 stars) or its MIT licence terms. Choose crlfuzz if its feature set, stack or MIT licence fits better. Both are self-hostable.