Top 10 Best THR eat Modeling Software of 2026

Microsoft Threat Modeling Tool is a free, desktop application from Microsoft designed specifically for threat modeling in software development lifecycles. It enables users to create data flow diagrams (DFDs) using standardized SDL shapes and automatically generates potential security threats based on the STRIDE methodology (Spoofing, Tampering, Repudiation, Information Disclosure, Denial of Service, Elevation of Privilege). The tool calculates risk scores to prioritize threats, generates detailed reports, and supports mitigation justifications, making it a cornerstone for secure design practices.

OWASP Threat Dragon is a free, open-source threat modeling tool developed by the OWASP Foundation, enabling users to create data flow diagrams (DFDs) and automatically generate threats using the STRIDE methodology. It supports visual modeling of system architectures, threat identification, and mitigation planning, with options for exporting models in JSON or SVG formats. Available as a web app or cross-platform desktop application, it integrates with GitHub for version control and collaboration.

ThreatModeler is a cloud-based platform that automates threat modeling by allowing teams to create visual data flow diagrams (DFDs) and automatically generate threats using STRIDE, PASTA, and other methodologies. It integrates seamlessly with CI/CD pipelines, Jira, Azure DevOps, and other DevOps tools for continuous threat assessment. The tool provides risk prioritization, remediation tracking, and supports cloud-native architectures, making it ideal for embedding security into the SDLC.

IriusRisk is a collaborative threat modeling platform that automates the identification and assessment of security threats using visual diagrams and established methodologies like STRIDE, PASTA, and OCTAVE. It generates threats automatically from architectural models, prioritizes risks with customizable scoring, and provides treatment recommendations to integrate security into the SDLC. The tool supports team collaboration, CI/CD integrations, and both cloud and on-premise deployments for scalable threat management.

Threagile is an open-source threat modeling tool that allows users to define their technical architecture using YAML-based 'diagrams as code,' automatically generating data flow diagrams, STRIDE-based threats, and prioritized risk assessments. It produces outputs including SVG diagrams, Excel risk sheets, Markdown reports, and even integrates with CI/CD pipelines for reproducible threat modeling. The web-based playground and downloadable binary make it accessible for both quick prototypes and enterprise use.

ThreatSpec is an open-source threat modeling tool that uses a Markdown-based domain-specific language (DSL) to document threats, mitigations, and requirements in a structured, human-readable format. It enables teams to create reusable threat libraries, perform automated threat analysis, and integrate threat modeling directly into development workflows like Git repositories. The platform emphasizes 'threat modeling as documentation,' making it lightweight and suitable for agile teams embedding security early in the SDLC.

Amenaza SecurITree is a specialized threat modeling tool from Amenaza Technologies that uses graphical attack-defense trees to model threats, attack paths, and countermeasures. It supports quantitative risk analysis through probabilistic simulations, attacker effort calculations, and sensitivity analysis to prioritize mitigations. The software excels in visualizing complex scenarios for critical systems and generates compliance reports for standards like ISO 27001.

ADAM (adam.security) is an AI-powered threat modeling platform specialized in automating security risk identification for software supply chains. It analyzes SBOMs, code repositories, and dependencies to generate prioritized threat models, highlighting vulnerabilities in third-party components and open-source libraries. Designed for DevSecOps integration, it embeds threat modeling into CI/CD pipelines without requiring manual diagramming or extensive expertise.

diagrams.net (formerly Draw.io) is a free, web-based diagramming tool that excels in creating visual diagrams such as data flow diagrams (DFDs), flowcharts, and entity-relationship models commonly used in threat modeling. It offers a vast library of customizable shapes, templates, and integrations with cloud storage like Google Drive and OneDrive, allowing users to manually model threats using STRIDE or other methodologies. While highly versatile for general diagramming, it lacks built-in threat analysis, automation, or validation features specific to threat modeling workflows.

Lucidchart is a cloud-based diagramming platform that supports threat modeling by providing templates and shapes for essential visuals like data flow diagrams (DFDs), STRIDE models, and attack trees. It excels in collaborative diagramming, allowing teams to map system architectures and manually identify threats in real-time. While not a dedicated threat modeling tool, it integrates with tools like Jira and Confluence for security workflows. Its intuitive interface makes it accessible for visualizing threats without specialized training.