projectdiscovery/subfinder
Fast passive subdomain enumeration tool.
Build with Backblaze B2
SDKs, agent skills, IDE extensions, and reference pipelines from Backblaze Labs. All open source.
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Where it stands
Rank, growth pace and release cadence relative to everything GStars tracks.
2 releases in the last 90 days, the latest 28 days ago, with 124 contributors on GitHub.
Use Cases & Benefits
- Enumerates valid subdomains for websites using passive online sources with a focus on speed and stealth.
- Offers fast, lightweight, and modular passive subdomain discovery optimized for integration and minimal resource usage.
- Use for passive reconnaissance in penetration testing to identify subdomains without active scanning.
- Use for bug bounty hunting to quickly gather subdomain information from multiple curated sources.
- Use for automating subdomain enumeration workflows by integrating with other tools via STDIN/STDOUT support.
Should you depend on it?
License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.
License
MIT
Permissive: commercial use, modification and redistribution are allowed with attribution.
Community files
- README: present
- Contributing guide: present
- Code of conduct: present
Watch-outs
No watch-outs from GStars' checks.
General guidance from repository metadata, not legal advice. How we score
From the README
Fast passive subdomain enumeration tool.
subfinderis a subdomain discovery tool that returns valid subdomains for websites, using passive online sources. It has a simple, modular architecture and is optimized for speed.subfinderis built for doing one thing only - passive subdomain enumeration, and it does that very well.We have made it to comply with all the used passive source licenses and usage restrictions. The passive model guarantees speed and stealthiness that can be leveraged by both penetration testers and bug bounty hunters alike.
Daily snapshots
Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots
Forks
1.6K+57
Open issues
8-1
Compared with peers in Backend
Fastest-growing repositories GStars tracks in this cohort for the week of Nov 1, by 7-day star growth
| Repository | Stars | +7d | Health | Last release |
|---|---|---|---|---|
| anthropics/skills | 187.8K | +2.9K | 15 | — |
| DuarteSantos8/openGym | 19.7K | +2.4K | 60 | 2 days ago |
| shiyu-coder/Kronos | 47.0K | +2.3K | 16 | — |
| NationalSecurityAgency/ghidra | 98.2K | +2.3K | 64 | 14 days ago |
| microsoft/VibeVoice | 56.0K | +1.1K | 29 | — |
| projectdiscovery/subfinder | 14.7K | — | 63 | 28 days ago |
| Category median | 56.0K | +2.3K | 29 | — |
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