Subfinder icon
Subfinder icon

Subfinder

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Subfinder is a subdomain discovery tool that discovers valid subdomains for websites by using passive online sources. It has a simple modular architecture and is optimized for speed. subfinder is built for doing one thing only - passive subdomain enumeration, and it does that...

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License model

  • Free • Open Source

Country of Origin

  • US flagUnited States

Platforms

  • Linux
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Features

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  1.  OSINT

 Tags

  • enumeration
  • hacking

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Subfinder information

  • Developed by

    US flagProject Discovery

  • Licensing

    Open Source (MIT) and Free product.

  • Written in

  • Alternatives

    5 alternatives listed

  • Supported Languages

    • English

GitHub repository

  •  11,916 Stars
  •  1,401 Forks
  •  12 Open Issues
  •   Updated Jun 30, 2025 
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Our users have written 0 comments and reviews about Subfinder, and it has gotten 2 likes

Subfinder was added to AlternativeTo by altts1zed on Apr 15, 2022 and this page was last updated Apr 15, 2022.
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What is Subfinder?

Subfinder is a subdomain discovery tool that discovers valid subdomains for websites by using passive online sources. It has a simple modular architecture and is optimized for speed. subfinder is built for doing one thing only - passive subdomain enumeration, and it does that very well.

We have designed subfinder to comply with all passive sources licenses, and usage restrictions, as well as maintained a consistently passive model to make it useful to both penetration testers and bug bounty hunters alike.

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