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
Sep 10, 2024 11:19pm 0 VERSION_BUMP ac23b384
Feb 5, 2024 1:04pm 0 VERSION_BUMP 62bd6ed8
Jan 12, 2024 1:12am 0 VERSION_BUMP 8f37f613
Jan 11, 2024 3:25pm 0 VERSION_BUMP 1a5f0361
Sep 27, 2023 2:37am 0 VERSION_BUMP ac330283
Sep 12, 2023 11:25am 0 VERSION_BUMP 6906176c
May 30, 2023 11:05pm 0 VERSION_BUMP b10175c8
May 1, 2023 2:03pm 0 VERSION_BUMP 02231db7
Mar 17, 2023 7:05pm 0 VERSION_BUMP 35a682ef
Mar 17, 2023 7:05pm 0 VERSION_BUMP 1c5faab9