CAIRIS vs IriusRisk

CCAIRIS9.4Visit IriusRisk9.3Visit

Higher score C CAIRIS #1 in Threat Modeling Software 9.4/10 Free plan Free plan✓ 4 of 4 features Visit CAIRIS

vs

IriusRisk #2 in Threat Modeling Software 9.3/10 Free plan Free plan✓ 3 of 4 features Visit IriusRisk

• CAIRIS fits best

  Teams needing broad, open-source threat modeling

• IriusRisk fits best

  Organizations wanting integrations and automated modeling

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Side by side

Feature	CCAIRIS 9.4/10 Visit ↗	IriusRisk 9.3/10 Visit ↗
At a glance
Editor score	9.4	9.3
Ranking	#1 in Threat Modeling Software	#2 in Threat Modeling Software
Best for	Teams needing broad, open-source threat modeling	Organizations wanting integrations and automated modeling
Pricing model	Free	Free plan + paid
Starting price	Free plan	—
Free plan	✓	✓
Free trial	—	—
Deployment	Cloud, Self-hosted	Cloud, Self-hosted
Platforms	Web, Windows, macOS, Linux	Web
Support	Docs	Email, Docs
Built for	Small business, Mid-market, Enterprise	Small business, Mid-market, Enterprise
Features CAIRIS 4/4 · IriusRisk 3/4
Attack-path analysis	✓ (best)	Not checked yet
Risk prioritization	✓	✓
Collaborative review	✓	✓
Templates and frameworks	✓	✓
Specs
Project limit	Not checked yet	Not checked yet
Modeling methods	Multiple	Multiple
Deployment	Both	Both
Our review
Pros	Combines data-flow, threat, requirements, and architectural modeling Includes risk scoring, attack trees, patterns, and reusable templates Supports self-hosting, APIs, imports, exports, and generated documentation	Automatic threats, countermeasures, risk scoring, and prioritization Free lifetime Community Edition with three active threat models SaaS and on-premises deployment with workflow integrations
Cons	Its broad scope may require more modeling coordination than focused tools Self-hosted deployment places infrastructure responsibility on the organization The feature set extends beyond teams seeking only basic threat diagrams	Community Edition supports one user with limited collaboration Community Edition is limited to three active threat models Enterprise pricing is quote-based
Our verdict	CAIRIS is an open-source platform for designing, specifying, and validating secure and usable systems. It is intended for security designers, requirements engineers, researchers, educators, and organizations working on software or… Read the review →	IriusRisk is a threat-modeling platform for security, development, and architecture teams. It combines data-flow diagramming, automatic threat and countermeasure generation, risk scoring, prioritization, security content libraries,… Read the review →

Strengths and trade-offs

• CAIRIS — where it wins

  • Combines data-flow, threat, requirements, and architectural modeling
  • Includes risk scoring, attack trees, patterns, and reusable templates
  • Supports self-hosting, APIs, imports, exports, and generated documentation

  Where it doesn't

  • Its broad scope may require more modeling coordination than focused tools
  • Self-hosted deployment places infrastructure responsibility on the organization
  • The feature set extends beyond teams seeking only basic threat diagrams

• IriusRisk — where it wins

  • Automatic threats, countermeasures, risk scoring, and prioritization
  • Free lifetime Community Edition with three active threat models
  • SaaS and on-premises deployment with workflow integrations

  Where it doesn't

  • Community Edition supports one user with limited collaboration
  • Community Edition is limited to three active threat models
  • Enterprise pricing is quote-based

• CCAIRIS9.4/10 · Free plan

  A broad open-source choice for teams connecting threats, requirements, architecture, and risk.

  Visit CAIRISFull verdict →
• IriusRisk9.3/10 · Free plan

  A flexible threat-modeling platform with automation, integrations, and a useful free tier.

  Visit IriusRiskFull verdict →