Open-Source Security · Threagile

threagile

Threagile is an open-source toolkit for agile threat modeling that lets teams define system architecture and assets as YAML files and automatically check them against built-in and custom security risk rules. It generates diagrams, risk reports, and Excel/JSON outputs to support iterative security analysis in CI/CD pipelines.

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Source: GitHub — github.com/Threagile/threagile

772

GitHub stars

167

Forks

Primary language

MIT

License (OSI-approved)

Key facts

Objective fields from the source. Values we can't verify are shown as “Unknown” rather than guessed.

Field	Value
Repository	Threagile/threagile
Owner	Threagile
Primary language	Go
License	MIT — OSI-approved
Stars	772
Forks	167
Open issues	51
Latest release	v0.9.1 (2024-07-30)
Last updated	2026-04-08
Source	https://github.com/Threagile/threagile

What threagile is

Written in Go, Threagile parses YAML architecture models, executes configurable risk rules (including custom YAML-based scripts), and outputs threat analysis as PDF reports, diagrams, and structured data (JSON, Excel). It supports Docker deployment, REST API server mode, and plugin-based custom rule injection.

Quickstart

Get the threagile source

Clone the repository and explore it locally.

terminalbash

1git clone https://github.com/Threagile/threagile.git2cd threagile3# follow the project's README for install & configuration

Need it deployed, integrated, or customized instead? DEV.co ships production installs.

Best use cases

Agile/DevSecOps Risk Assessment

Integrate threat modeling into CI/CD pipelines by versioning architecture YAML alongside code, auto-generating risk reports on every commit, and tracking threat evolution over time.

Architecture Review & Compliance Documentation

Generate standardized threat diagrams, data flow visualizations, and risk PDFs to support architecture reviews, security audits, and regulatory compliance evidence.

Custom Risk Rule Development

Define organization-specific threat patterns as YAML scripts without compiling Go, enabling teams to encode domain knowledge and compliance policies directly into threat analysis.

Implementation considerations

YAML model authoring and maintenance require developer/architect buy-in; consider training and IDE support setup (Threagile offers editing-support generation).
Custom risk rules are written in a YAML script language—review the language reference and testing framework before building complex logic.
Docker container execution simplifies environment isolation but requires container registry access and volume mounts for model I/O.
REST API server mode (v0.9.1+) supports persistent storage; ensure volume provisioning and memory allocation (README suggests --shm-size=256m) for production deployments.
Risk rule plugins (.so files) allow Go-based extensions; building and versioning these requires Go toolchain integration in your CI/CD.

When to avoid it — and what to weigh

No YAML/Text-Based Modeling Appetite — If your team requires a fully polished GUI for threat modeling, Threagile's README notes UI efforts are ongoing and not production-ready; consider tools with mature graphical interfaces.
Real-Time Interactive Collaboration Needed — Threagile is CLI/batch-oriented. For live, multi-user threat modeling sessions with immediate visual feedback, this is not the right tool.
Minimal Security Tooling Budget — While free, Threagile requires CI/CD integration, YAML expertise, and custom rule maintenance—adding operational overhead not suitable for teams seeking out-of-box simplicity.
Proprietary Threat Rule Sets Required — If your organization mandates closed-source, vendor-locked risk rule engines, an open-source YAML-based rule system may not meet governance requirements.

License & commercial use

MIT License—a permissive OSI-approved license allowing commercial use, modification, and distribution with minimal restrictions (retain copyright and license notice).

MIT License permits commercial use. However, verify your organization's open-source policy regarding dependency inspection and long-term maintenance obligations. The project is actively maintained (last push 2026-04-08) but is community-driven; no commercial support contract or SLA is evident from the data provided.

DEV.co evaluation signals

Editorial assessment — not user reviews. Directional, with an explicit confidence level.

Signal	Assessment
Maintenance	Active
Documentation	Adequate
License clarity	Clear
Deployment complexity	Moderate
DEV.co fit	Good
Assessment confidence	High

Security considerations

Threagile is a threat modeling *tool*, not a runtime security product. Key considerations: (1) YAML models may contain sensitive architecture details—ensure repo access controls; (2) custom risk rules execute during analysis—review plugin sources before deployment; (3) REST server mode handles model payloads—assess network exposure and input validation; (4) no explicit audit logging or data sanitization mentioned; (5) for regulated workloads, validate that generated risk outputs and rule engine behavior meet compliance standards.

Alternatives to consider

Microsoft Threat Modeling Tool

Mature GUI-based threat modeling with built-in STRIDE methodology; better for teams seeking graphical workflow, but less agile/CI-friendly than Threagile.

IriusRisk / ThreatModeler

Commercial platforms with polished UIs, managed rule engines, and audit trails; preferred for regulated enterprises but costly and less flexible for custom risk logic.

PyTM (Python Threat Modeling)

Lightweight Python-based alternative for code-driven threat models; simpler than Threagile for small systems but less mature ecosystem and fewer built-in risk rules.

Software development agency

Build on threagile with DEV.co software developers

Threagile brings agile threat modeling to CI/CD. Evaluate the tool's YAML model approach, custom rule engine, and Docker deployment against your team's architecture review process. Contact us to explore integration patterns or compare with commercial alternatives.

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threagile FAQ

Can I use Threagile in a CI/CD pipeline?

Yes. Docker container and command-line flags support automated execution on model YAML files. Outputs (JSON, Excel, PDF) can be archived or fed into downstream tools.

Do I need Go knowledge to use Threagile?

No for basic use (YAML modeling and built-in rules). For custom rules, use the YAML script language. Go is only needed if you develop .so plugin extensions.

Is there a GUI?

Not yet production-ready. README notes UI efforts are ongoing. Currently, Threagile is CLI/server-based with YAML editing in your IDE.

What is the support model?

Community-driven (GitHub issues, discussions, Gitter chat). No commercial support contract is documented. Active maintenance but no SLA.

Software developers & web developers for hire

From first prototype to production, DEV.co delivers software development services around tools like threagile. Our software development agency staffs experienced software developers and web developers for custom software development, web development, integrations, and ongoing support across open-source security and beyond.

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