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Head-to-head · Threat Modeling Software

IriusRisk vs ThreatOpus

  • Updated Oct 2026
  • Both researched from official sources
  • 5 checks side by side
Higher score IriusRisk #2 in Threat Modeling Software 9.3/10 Free plan Free plan✓ 3 of 4 features Visit IriusRisk
ThreatOpus #4 in Threat Modeling Software 9.1/10 Free plan Free plan✓ 4 of 4 features Visit ThreatOpus

IriusRisk leads on 0 checks, ThreatOpus on 0, and 5 are even. Who comes out ahead on the 5 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreIriusRisk · 9.3/10
  • Free planboth
  • Most featuresThreatOpus · 4 of 4

IriusRisk scores higher on our rubric for threat modeling software: 9.3 against 9.1 out of 10; our editors rank them #2 and #4.

IriusRisk is the better fit for organizations wanting integrations and automated modeling. ThreatOpus is the better fit for teams wanting affordable workflow-integrated modeling.

  • IriusRisk fits best

    Organizations wanting integrations and automated modeling

  • ThreatOpus fits best

    Teams wanting affordable workflow-integrated modeling

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature IriusRisk 9.3/10 Visit ↗ ThreatOpus 9.1/10 Visit ↗
At a glance
Editor score 9.3 9.1
Ranking #2 in Threat Modeling Software #4 in Threat Modeling Software
Best for Organizations wanting integrations and automated modeling Teams wanting affordable workflow-integrated modeling
Pricing model Free plan + paid Free plan + paid
Starting price — £129.99/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted Cloud, Self-hosted
Platforms Web Web
Support Email, Docs Email, Docs
Compliance ISO 27001, GDPR, SSO/SAML 2FA, SSO/SAML
Integrations 20 integrations 11 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features IriusRisk 3/4 · ThreatOpus 4/4
Attack-path analysis Not checked yet ✓ (best)
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
  • Automatic threats, countermeasures, risk scoring, and prioritization
  • Free lifetime Community Edition with three active threat models
  • SaaS and on-premises deployment with workflow integrations
  • Free plan includes threat modeling, PR reviews, STRIDE, and collaboration tools
  • Imports OpenAPI and Terraform with attack-path context and mitigation tracking
  • Connects with major SCM, CI, chat, and collaboration platforms
Cons
  • Community Edition supports one user with limited collaboration
  • Community Edition is limited to three active threat models
  • Enterprise pricing is quote-based
  • Free plan is limited to one repository and one SCM or CI provider
  • All listed methodologies are reserved for the Pro and Enterprise tiers
  • Single sign-on and unlimited workspaces are Enterprise features
Our verdict

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 →

ThreatOpus is a cloud-hosted security platform for security, platform, and engineering teams that want threat modeling connected to development workflows. It combines AI-assisted modeling with pull-request security checks, allowing teams…

Read the review →
  1. IriusRiskThreat Modeling Software 9.3Free plan
  2. ThreatOpusThreat Modeling Software 9.1Free plan

Strengths and trade-offs

  • 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

  • ThreatOpus — where it wins

    • Free plan includes threat modeling, PR reviews, STRIDE, and collaboration tools
    • Imports OpenAPI and Terraform with attack-path context and mitigation tracking
    • Connects with major SCM, CI, chat, and collaboration platforms

    Where it doesn't

    • Free plan is limited to one repository and one SCM or CI provider
    • All listed methodologies are reserved for the Pro and Enterprise tiers
    • Single sign-on and unlimited workspaces are Enterprise features

More comparisons

All threat modeling software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update