subfinder ☆
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Description:
Subdomain discovery tool
Type: Formula  |  Latest Version: 2.10.1@0  |  Tracked Since: Dec 19, 2025
Links: Homepage  |  GitHub  |  Docs  |  @pdiscoveryio  |  formulae.brew.sh
Stars: 12,739  |  Forks: 1,485  |  Language: Go  |  Category: Security
Tags: security reconnaissance subdomain bug-bounty go networking
Install: brew install subfinder
About:
Subfinder is a fast and modular subdomain discovery tool that uses passive sources to enumerate valid subdomains for websites. It is designed for penetration testers and bug bounty hunters to perform comprehensive reconnaissance. The tool integrates with multiple data sources and supports output in various formats for easy integration into security workflows.
Key Features:
  • Passive subdomain enumeration
  • Modular architecture with multiple data sources
  • Fast and concurrent scanning
  • Output in JSON, text, and other formats
  • Easy integration with other tools
Use Cases:
  • Bug bounty hunting and reconnaissance
  • Penetration testing and security assessments
  • Attack surface mapping for organizations
  • Continuous monitoring for new subdomains
Alternatives:
  • amass – More comprehensive but heavier; Subfinder is faster and more focused on passive enumeration.
  • findomain – Also fast and focused; Subfinder offers more modular source integration.
Version History
Detected Version Rev Change Commit
Dec 19, 2025 7:14pm 2.10.1 0 VERSION_BUMP 5e194fdc
Sep 26, 2025 6:00pm 0 VERSION_BUMP eb6826ec
Jan 14, 2025 11:12am 0 VERSION_BUMP cc9653ee
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