List of the Top 5 Free Threat Modeling Tools in 2025

IriusRisk serves as an accessible Threat Modeling platform suitable for both development and operations teams, even those lacking previous security knowledge. Regardless of whether an organization adheres to a specific framework, we accommodate various threat modeling methodologies including STRIDE, TRIKE, OCTAVE, and PASTA. Our platform supports a diverse range of sectors, including financial services, insurance, industrial automation, healthcare, and the private sector. Recognized as a premier solution for threat modeling and secure design within Application Security, IriusRisk collaborates with enterprise clients that include Fortune 500 companies in banking, payments, and technology. The platform equips security and development teams to integrate security measures from the outset, leveraging its robust threat modeling capabilities. By utilizing IriusRisk, teams can initiate threat modeling practices from the ground up or enhance their existing frameworks, leading to increased efficiency in market delivery, improved teamwork between security and development personnel, and a significant reduction in potential security vulnerabilities. Ultimately, IriusRisk is designed to foster a culture of proactive security across all stages of application development.

By entering or uploading a variety of data concerning security, usability, and requirements, you can uncover significant insights, including the connections between risks and requirements, as well as the reasons behind specific persona characteristics. Recognizing that a single viewpoint cannot capture the full complexity of a system, you have the ability to generate 12 unique perspectives of your evolving design that analyze elements such as users, threats, requirements, architecture, and geographical factors. As your initial design takes shape, you can also automatically generate threat models, such as Data Flow Diagrams (DFDs), to better understand potential vulnerabilities. By leveraging open-source intelligence on possible threats and effective security architectures, you can evaluate your attack surface with precision. Moreover, you can create visual representations of all security, usability, and design elements that relate to the risks of your product, illustrating how they interact with one another. This holistic methodology guarantees a comprehensive grasp of both the vulnerabilities and strengths inherent in your system, ultimately enhancing your overall security strategy. Additionally, this multifaceted approach allows you to make informed decisions that can significantly improve your design's resilience against potential threats.

Threagile provides teams with a straightforward solution for implementing Agile Threat Modeling, effortlessly fitting into DevSecOps processes. This open-source toolkit enables users to outline an architecture and its components in a flexible, declarative style through a YAML file, which can be modified directly within an IDE or any editor compatible with YAML. Upon execution of the Threagile toolkit, it evaluates a set of risk rules that assess the security of the architecture model, producing a detailed report that highlights potential weaknesses and offers recommended mitigation measures. Furthermore, it generates visually engaging data-flow diagrams and supports output in multiple formats, including Excel and JSON, to facilitate further examination. The tool also incorporates continuous risk management within the Threagile YAML model file, allowing teams to effectively monitor their risk mitigation efforts. Threagile can be conveniently run via the command line, and users have the option to utilize a Docker container or configure it as a REST server for enhanced accessibility. This range of deployment options guarantees that teams can select the setup that aligns best with their specific development environment and workflow requirements. By integrating these functionalities, Threagile significantly enhances the overall security posture of development projects.

An influx of vulnerabilities can be daunting, yet it is impractical to tackle every single one. By leveraging detailed threat intelligence and advanced prioritization methods, organizations can minimize costs, improve workflows, and ensure that their teams focus on the most pressing threats they face. This methodology exemplifies Modern Risk-Based Vulnerability Management. Our Risk-Based Vulnerability Management software sets a new benchmark in the industry, guiding security and IT teams on which infrastructure vulnerabilities to prioritize and the optimal timing for intervention. The latest version illustrates that exploitability can indeed be measured, and by effectively quantifying it, organizations can work towards its reduction. Cisco Vulnerability Management, formerly known as Kenna.VM, combines actionable threat insights with advanced data analytics to pinpoint vulnerabilities that pose the highest risks, allowing you to shift focus away from less critical threats. Anticipate a faster decline in your lengthy catalog of “critical vulnerabilities,” akin to a wool sweater shrinking in a hot wash cycle, leading to a more streamlined and efficient security strategy. Embracing this contemporary approach enables organizations to significantly bolster their security posture and respond with greater agility to evolving threats, ultimately fostering a more resilient operational environment.

ThreatModeler™ is an innovative enterprise threat modeling platform that automates the process of developing secure applications, significantly minimizing the necessary effort in this crucial area. In today's rapidly evolving digital landscape, information security professionals face an urgent demand to construct comprehensive threat models that encompass their organization’s data and software. Our platform operates at the expansive scale of their IT ecosystem while keeping pace with the speed of innovation. By leveraging ThreatModeler™, enterprise IT organizations can seamlessly integrate their specific security requirements and policies into the broader cyber ecosystem. This capability offers real-time insights into their threat portfolio and associated risks. As a result, InfoSec executives and CISOs acquire a thorough understanding of their entire attack landscape, alongside their defense-in-depth strategies and compensating controls, enabling them to allocate resources more strategically and enhance their operational efficiency. Consequently, this empowers organizations to proactively identify vulnerabilities and respond effectively to emerging threats.