# owasp-amass/amass

In-depth attack surface mapping and asset discovery

Repository: https://github.com/owasp-amass/amass
Canonical: https://ross.abutalabs.com/products/amass
Homepage: https://owasp.org/www-project-amass/
Language: Go
License: NOASSERTION
License Family: other
Topics: go, dns, subdomain, enumeration, recon, osint, osint-reconnaissance, network-security, owasp, maltego, attack-surfaces, information-gathering, golang
Last push: 2026-07-19T05:16:40+00:00

## Health v2 (maintenance only)
Score: 81/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 93, release rhythm 54, longevity 100
- inputs: {"age_days": 2976, "days_push": 45, "days_rel": 149, "gap_med": 123.0, "n_releases_24m": 3}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 15047, forks 2173 (observed 2026-08-28T04:11:09.080014+00:00)

## What it is
OWASP Amass is a Go-based framework for in-depth attack surface mapping and external asset discovery using OSINT gathering and active reconnaissance techniques. It includes a collection engine, an asset database, and the Open Asset Model for understanding attack surfaces.

## Use cases
- enumerate subdomains of a target domain
- map an organization's external attack surface
- discover assets via open source intelligence
- perform DNS enumeration and reconnaissance
- feed discovered assets into Maltego
- monitor asset changes over time for security teams

## When to choose
- you need comprehensive OSINT-driven attack surface discovery
- you want an OWASP-maintained, actively developed recon tool
- you need subdomain enumeration at scale with data storage

## When to avoid
- you need internal network vulnerability scanning rather than external asset discovery
- you want a GUI-only tool without CLI usage
- you need web application scanning (e.g., DAST) rather than reconnaissance

## Facets
- artifact type: cli-tool
- maturity: active
- function: osint, security, networking, cli, developer-tools
- domain: security, penetration-testing, osint, networking
- platform: windows, go, cli
- tags: attack-surface-mapping, asset-discovery, subdomain-enumeration, reconnaissance, dns, owasp, maltego, linux, macos, docker

## Member repositories
- owasp-amass/amass (main) score 81

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:09.080014+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 2026-08-29T17:06:46.051400+00:00, confidence not recorded.
  - readme: https://github.com/owasp-amass/amass (fetched 2026-08-28T04:11:09.080014+00:00, sha 247208429059)
  - homepage: https://owasp.org/www-project-amass/ (fetched 2026-08-29T08:04:41.152071+00:00, sha fcfb91bc0fcd)
  - site_page: https://owasp.org/about (fetched 2026-08-29T08:04:41.161546+00:00, sha b21a48297b2d)
- Data as of 2026-08-30T08:39:29.467469+00:00.