Instead of CAIRIS
CAIRIS alternatives
CAIRIS combines secure-system design with usability and requirements work. It stores assets, countermeasures, factoids, personas, requirements, and architectural components, then automatically creates 12 views across people, risks, requirements, architecture, and physical location. As designs evolve, it generates threat models such as Data Flow Diagrams, uses attack and architectural patterns to examine attack surfaces and potential GDPR issues, and produces Volere-compliant specifications and GDPR DPIA documents. Its API also supports custom design applications and toolchain connections.
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OWASP Threat Dragon
Free plan LinuxMacSelf-hosted+2Visual threat diagrams with repository and drive integrations — Threat Dragon focuses on diagram-based threats, multiple threat categories, and context-sensitive rule suggestions, rather than CAIRIS's broader requirements and usability modeling.
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pytm
Free plan LinuxMacWindowsPython-defined, developer-centric threat models — pytm defines models in Python and generates Graphviz or PlantUML outputs, while CAIRIS provides a broader design-data platform and browser application.
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ThreatForge
Free plan LinuxMacWeb+1Offline visual modeling with optional AI assistance — ThreatForge adds an offline STRIDE engine, AI conversations using BYOK, and git-diffable YAML files, unlike CAIRIS's wider requirements and compliance documents.
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IriusRisk
Free plan APISelf-hostedWebAI-assisted compliance-focused threat modeling — IriusRisk uses Jeff AI Assistant, compliance standards, diagram imports, and enterprise integrations, whereas CAIRIS combines threat analysis with usability and requirements.
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Threagile
Free plan APILinuxSelf-hosted+1YAML architecture models in developer workflows — Threagile centers YAML risk rules, Git-diffable models, mitigation tracking, and automated exports, while CAIRIS also models personas, usability, and requirements.
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ThreatModeler Nexus
Free plan APISelf-hostedWebGoverned enterprise threat modeling across environments — ThreatModeler Nexus adds a Secure Design Graph, AI agents, MCP pull-request checks, and mappings to more than 180 frameworks beyond CAIRIS's scope.
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ThreatOpus
Free plan APIWebPull-request security decisions in CI pipelines — ThreatOpus combines STRIDE modeling with Merge Guard PASS, WARN, or FAIL pull-request checks, while CAIRIS emphasizes broader design analysis and documentation.
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Dethernety
Free plan Open source APISelf-hostedWeb - 9
AWS Threat Composer
Free plan APIExtensionLinux+4 - 10
ADTool
Free plan - 11
ThreatTree
Free plan APIWeb - 12
TSpec
Free plan - 13
DevArmor
Paid APIExtensionSelf-hosted+1 - 14
CYMETRIS
Paid APISelf-hostedWeb - 15
Microsoft Threat Modeling Tool
Free plan Windows - 16
ThreatZ
Free trial APISelf-hostedWeb - 17
AutoSec TARA Suite
Paid Self-hostedWeb - 18
itemis SECURE
Paid WebWindows - 19
SD Elements
Paid APISelf-hostedWeb5.4 Visit site - 20
KAVACH
Paid Windows - 21
EnCo SOX ATA
Paid WebWindows - 22
ThreatModeler CloudModeler
Paid Web
An alternative can make more sense when your priority is focused threat diagrams, code-defined models, pull-request checks, AI assistance, or particular integrations. CAIRIS is free and supports API, web, self-hosted, Linux, macOS, and Windows access, but the live demo is rebuilt nightly and exposes all databases to everyone. Before switching, compare each product's modeling method, storage approach, collaboration, deployment, compliance coverage, and developer workflow. Consider whether you still need CAIRIS's combined security, usability, and requirements scope or prefer a narrower threat-modeling tool.