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OWASP Threat Dragon
What it is
OWASP Threat Dragon creates threat-model diagrams and records threats associated with their elements as part of secure development work. Diagrams can represent processes, data stores, actors, data flows, and trust boundaries. It supports STRIDE, LINDDUN, CIA, CIA-DIE, DIE, and PLOT4ai threat categories; a rule engine can suggest threats and mitigations based on diagram element properties. Users can run it as a containerized, self-hosted web application or as a desktop app, with installers for Windows, macOS, and Linux. The web app supports local file storage and configurable access to GitHub, GitHub Enterprise, Google Drive, Bitbucket, Bitbucket Enterprise, and GitLab. The desktop app stores models locally. Threat Dragon is free and open source under Apache License 2.0, with no paid plans or usage limits stated. Analytics are disabled by default and require server configuration; the project says they do not collect threat-model content or usernames for Plausible. The project is maintained by volunteers and notes that immediate investigation or response to incidents may not always be possible.
For and against
For
- Supports six named threat-category frameworks.
- Rule engine can suggest threats and mitigations.
- Available as desktop software or self-hosted web application.
- Web app supports local storage and configurable integrations.
- Free and open source under Apache License 2.0.
Against
- Immediate incident investigation or response is not always possible.
- Web integrations require configuration.
- Desktop models are saved locally.
The verdict
Threat Dragon provides diagramming and threat suggestions across several modeling frameworks, with both desktop and self-hosted web options. Its volunteer maintenance model means immediate incident response is not guaranteed.
Who it suits
Threat Dragon is intended for developers and defenders, and the project says both experienced threat modelers and beginners can use it. It may suit people who want a desktop or self-hosted web tool for documenting threats.
Plans and prices
Free
No paid plans or usage limits stated
Read 3 Oct 2026 · owasp.org
On the record
- Deployment
- Threat Dragon can run as a containerized, self-hosted web application or as a desktop application.threatdragon.com · read 3 Oct 2026
- Desktop platforms
- Desktop installers are provided for Windows, macOS and Linux.threatdragon.com · read 3 Oct 2026
- Diagrams
- Diagrams can include processes, data stores, actors, data flows and trust boundaries.threatdragon.com · read 3 Oct 2026
- Intended users
- OWASP describes Threat Dragon as intended for developers and defenders, and says both experienced threat modelers and beginners can use it.owasp.org · read 3 Oct 2026
- License
- The OWASP project page lists the license as Apache License 2.0.owasp.org · read 3 Oct 2026
- Maintenance limitation
- The project is maintained by volunteers and says immediate investigation or response to incidents is not always possible.threatdragon.com · read 3 Oct 2026
- Privacy
- Analytics are disabled by default, require server configuration, and do not collect threat model content or usernames for Plausible.threatdragon.com · read 3 Oct 2026
- Purpose
- Threat Dragon creates threat model diagrams and lists threats for diagram elements as part of a secure development lifecycle.owasp.org · read 3 Oct 2026
- Security practices
- The project says its repository enforces signed commits, supply-chain actions use full-length SHAs, and desktop releases are signed and notarized where possible.threatdragon.com · read 3 Oct 2026
- Security testing
- The project says automated dependency, SAST, DAST and container security scans run on every commit.threatdragon.com · read 3 Oct 2026
- Storage and integrations
- The web app supports local file storage and configurable access to GitHub, GitHub Enterprise, Google Drive, Bitbucket, Bitbucket Enterprise and GitLab; the desktop app saves models locally.threatdragon.com · read 3 Oct 2026
- Support
- The project directs users to its mailing list, OWASP Slack channel, GitHub issues and public discussions for questions, bugs and feature requests.owasp.org · read 3 Oct 2026
- Threat frameworks
- It supports STRIDE, LINDDUN, CIA, CIA-DIE, DIE and PLOT4ai threat categories.threatdragon.com · read 3 Oct 2026
- Threat suggestions
- A rule engine can suggest threats and mitigations, including context-specific suggestions based on diagram element properties.threatdragon.com · read 3 Oct 2026
