head to head · open source
ProjectDiscovery vs opentrap
ProjectDiscovery has 32,309 GitHub stars, 3,943 forks, 107 open issues and last shipped yesterday. opentrap has 543 stars, 7 forks, 0 open issues and last shipped 2 days ago. ProjectDiscovery leads on adoption by 5,850% (32,309 vs 543 stars). ProjectDiscovery is written in Go under MIT; opentrap is written in Java under AGPL-3.0. ProjectDiscovery has attracted 12% as many forks as stars, opentrap 1%. ProjectDiscovery was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (dast), 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 | opentrap | |
|---|---|---|
| GitHub stars | ★ 32K | ★ 543 |
| License | MIT | AGPL-3.0 |
| Written in | Go | Java |
| Last push | 2026-10-26 | 2026-10-25 |
| Forks | ⑂ 3.9K | ⑂ 7 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ProjectDiscovery if
- You weight community size — 32K stars and counting
- You want the MIT license terms
- Your stack matches Go
- You value the larger contributor base for long-term maintenance
pick opentrap if
- You want the opentrap feature set and don't need the biggest community
- You prefer the AGPL-3.0 license terms
- Your stack matches Java
- You evaluated both and opentrap fits your workflow better
About ProjectDiscovery
English • 中文 • Korean • Indonesia • Spanish • 日本語 • Portuguese • Türkçe Nuclei is a modern, high performance vulnerability scanner that leverages simple YAML based templates. It empowers you to design custom vulnerability detection scenarios that mimic real world conditions, leading to zero false positives. Simple YAML format for creating and customizing vulnerability templates. Contributed by thousands of security professionals to tackle trending vulnerabilities. Reduce false positives by simulating real world steps to verify a vulnerability. Ultra fast parallel scan processing and request clustering. Integrate…
read the full ProjectDiscovery overview →
About opentrap
Open Traffic Replay and Analysis Proxy A free and open source alternative to Burp Suite, built on the trusted OWASP ZAP engine. Share: X · LinkedIn · Reddit · Hacker News One command to download and run the tool: The Dashboard after a scan: the crawl's locations and requests, the audit's findings by severity, and the most serious vulnerabilities as they were confirmed. Proudly free and open source OpenTRAP is free and open source software, released under the GNU AGPL v3.0 with no licence gate on anything. We stand with the organisations that make free and open source software possible if…
read the full opentrap overview →
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Frequently asked questions
Is ProjectDiscovery or opentrap more popular?
ProjectDiscovery has 32,309 GitHub stars and opentrap has 543. ProjectDiscovery has the larger community by that measure.
Are ProjectDiscovery and opentrap free?
Both are open source. ProjectDiscovery is licensed under MIT and opentrap under AGPL-3.0. Neither carries a licence fee.
What is the difference between ProjectDiscovery and opentrap?
ProjectDiscovery is written in Go and opentrap in Java. 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 opentrap?
Choose ProjectDiscovery if you want the larger community (32,309 stars) or its MIT licence terms. Choose opentrap if its feature set, stack or AGPL-3.0 licence fits better. Both are self-hostable.