# OWASP/threat-dragon

An open source threat modeling tool from OWASP

Repository: https://github.com/OWASP/threat-dragon
Canonical: https://ross.abutalabs.com/products/threat-dragon
Homepage: https://owasp.org/www-project-threat-dragon/
Language: JavaScript
License: Apache-2.0
License Family: permissive
Topics: threat-modeling, sdlc, owasp, owasp-threat-dragon, threat-dragon
Last push: 2026-08-26T12:37:03+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 71, longevity 100
- inputs: {"age_days": 2283, "days_push": 7, "days_rel": 115, "gap_med": 64.5, "n_releases_24m": 7}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1572, forks 397 (observed 2026-08-28T04:05:05.549974+00:00)

## What it is
OWASP Threat Dragon is a free, open-source, cross-platform threat modeling application for drawing data flow diagrams and listing threats for diagram elements. It supports STRIDE, LINDDUN, CIA, DIE, and PLOT4ai methodologies, auto-generates threats via a rule engine, and runs as a web app or desktop app with GitHub, Bitbucket, and GitLab integration.

## Use cases
- draw threat model data flow diagrams
- create STRIDE threat models for a system
- record threats and mitigations during secure development lifecycle
- model threats for a microservices architecture
- collaboratively store threat models in GitHub or GitLab
- auto-generate threats from diagram elements
- teach threat modeling to a development team

## When to choose
- you need a free, open-source threat modeling tool with diagramming
- your team follows STRIDE, LINDDUN, CIA, DIE, or PLOT4ai methodologies
- you want threat models stored in git-based repositories
- you need both web and desktop versions

## When to avoid
- you need automated scanning of live infrastructure rather than manual modeling
- you require commercial support or enterprise compliance certifications
- you need deep integration with proprietary ticketing or GRC platforms

## Facets
- artifact type: application
- maturity: active
- function: security, gui, editor
- domain: security, developer-tools, web-development
- platform: cross-platform, windows, self-hosted
- tags: threat-modeling, stride, linddun, data-flow-diagram, owasp, sdlc, risk-assessment, web-server, desktop, linux, macos

## Member repositories
- OWASP/threat-dragon (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:05.549974+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 2026-08-30T03:58:05.151257+00:00, confidence not recorded.
  - readme: https://github.com/OWASP/threat-dragon (fetched 2026-08-28T04:05:05.549974+00:00, sha b4c17b1e8838)
  - homepage: https://owasp.org/www-project-threat-dragon/ (fetched 2026-08-29T11:28:02.042256+00:00, sha f126254402ae)
  - site_page: https://owasp.org/about (fetched 2026-08-29T11:28:02.045200+00:00, sha b21a48297b2d)
- Data as of 2026-08-30T08:39:29.467469+00:00.