# tomnomnom/assetfinder

Find domains and subdomains related to a given domain

Repository: https://github.com/tomnomnom/assetfinder
Canonical: https://ross.abutalabs.com/products/assetfinder
Language: Go
License: MIT
License Family: permissive
Last push: 2024-06-07T17:08:47+00:00

## Health v2 (maintenance only)
Score: 23/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 0, release rhythm 8, longevity 100
- inputs: {"age_days": 2628, "days_push": 817, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3666, forks 548 (observed 2026-08-28T04:08:13.380306+00:00)

## What it is
A Go command-line tool that discovers domains and subdomains potentially related to a given domain by querying multiple passive sources like crt.sh, VirusTotal, and the Wayback Machine. It is commonly used for reconnaissance in security assessments and bug bounty hunting.

## Use cases
- find subdomains of a target domain
- enumerate assets for a bug bounty scope
- passive reconnaissance on a company's domains
- discover related domains via certificate transparency logs
- build a subdomain list for security scanning
- map an organization's external attack surface

## When to choose
- you need a fast, single-purpose CLI for passive subdomain discovery
- you want to aggregate results from multiple free OSINT sources
- you prefer lightweight Go tools that pipe into other recon utilities

## When to avoid
- you need active subdomain brute-forcing or DNS resolution
- you want a full-featured reconnaissance framework with reporting
- you require actively maintained source integrations or new features

## Facets
- artifact type: cli-tool
- maturity: maintenance
- function: web-scraping, search-engine, security, cli
- domain: security, osint, crawlers, developer-tools
- platform: windows, cli, cross-platform
- tags: subdomain-enumeration, osint, recon, bug-bounty, attack-surface-discovery, command-line, linux, macos

## Member repositories
- tomnomnom/assetfinder (main) score 23

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:13.380306+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:31:33.078803+00:00, confidence not recorded.
  - readme: https://github.com/tomnomnom/assetfinder (fetched 2026-08-28T04:08:13.380306+00:00, sha 6a5f2f6b3beb)
- Data as of 2026-08-30T08:39:29.467469+00:00.