Best Free Threat Modeling Tools
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Compare the Top Free Threat Modeling Tools as of May 2025
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What are Free Threat Modeling Tools?
Threat modeling tools are software solutions that enable organizations identify, assess, and prioritize security threats within their systems, applications, and networks. These tools enable security teams to create structured models of their infrastructure and simulate potential attack scenarios, helping to uncover vulnerabilities before they can be exploited. Threat modeling tools typically allow users to map out the flow of data, identify entry points, and analyze the potential impact of different types of threats, such as unauthorized access or data breaches. By automating aspects of the threat identification process, these tools help organizations proactively strengthen their security posture. They are essential for risk management and ensuring that security controls are effectively implemented. Compare and read user reviews of the best Free Threat Modeling tools currently available using the table below. This list is updated regularly.
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IriusRisk
IriusRisk
IriusRisk is the industry's leading threat modeling and secure design solution in Application Security. With enterprise clients including Fortune 500 banks, payments, and technology providers, it empowers security and development teams to ensure applications have security built-in from the start - using its powerful threat modeling platform. Whether teams are implementing threat modeling from scratch, or scaling-up their existing operations, the IriusRisk approach results in improved speed-to-market, collaboration across security and development teams, and the avoidance of costly security flaws. -
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CAIRIS
CAIRIS
From assets to countermeasures, factoids to personas, and requirements to architectural components, enter or import a wide range of security, usability, and requirements data to find new insights ranging from interconnections between requirements and risks, to the justification behind persona characteristics. No single view captures a complex system, so automatically generate 12 different views of your emerging design from perspectives ranging from people, risks, requirements, architecture, and even physical location. Automatically generate threat models such as Data Flow Diagrams (DFDs) as your early stage design evolves. Leverage open source intelligence about potential attacks and candidate security architectures to measure your attack surface. Show all the security, usability, and design elements associated with your product's risks.Starting Price: Free -
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Threagile
Threagile
Threagile enables teams to execute Agile Threat Modeling as seamless as possible, even highly-integrated into DevSecOps environments. Threagile is the open-source toolkit which allows to model an architecture with its assets in an agile declarative fashion as a YAML file directly inside the IDE or any YAML editor. Upon execution of the Threagile toolkit a set of risk-rules execute security checks against the architecture model and create a report with potential risks and mitigation advice. Also nice-looking data-flow diagrams are automatically created as well as other output formats (Excel and JSON). The risk tracking can also happen inside the Threagile YAML model file, so that the current state of risk mitigation is reported as well. Threagile can either be run via the command-line (also a Docker container is available) or started as a REST-Server.Starting Price: Free -
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A tidal wave of vulnerabilities, but you can’t fix them all. Rely on extensive threat intel and patented prioritization to cut costs, save time, and keep your teams efficiently focused on reducing the biggest risks to your business. This is Modern Risk-Based Vulnerability Management. We created Risk-Based Vulnerability Management software and now we’re defining the modern model. Show your security and IT teams which infrastructure vulnerabilities they should remediate, when. Our latest version reveals exploitability can be measured, and accurately measuring exploitability can help you minimize it. Cisco Vulnerability Management (formerly Kenna.VM) combines real-world threat and exploit intelligence and advanced data science to determine which vulnerabilities pose the highest risk and which you can deprioritize. Spoiler alert: Your mega-list of “critical vulnerabilities” will shrink faster than a woolen sweater-vest in a hot cycle.
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ThreatModeler
ThreatModeler
ThreatModeler™ enterprise threat modeling platform is an automated solution that simplifies efforts associated with developing secure applications. We fill a critical and growing need among today's information security professionals: to build threat models of their organizations' data, software, hardware, and infrastructure at the scale of the IT ecosystem and at the speed of innovation. ThreatModeler™ empowers enterprise IT organizations to map their unique secure requirements and policies directly into their enterprise cyber ecosystem – providing real-time situational awareness about their threat portfolio and risk conditions. CISOs and other InfoSec executives gain a comprehensive understanding of their entire attack surface, defense-in-depth strategy, and compensating controls, so they can strategically allocate resources and scale their output.
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