Best ThreatOpus Alternatives in 2026
The top ThreatOpus alternatives are CAIRIS, IriusRisk and ThreatModeler Nexus: 15 threat modeling software our editors would look at instead of ThreatOpus, in our ranking order.
ThreatOpus: A workflow-integrated threat modeling platform with a capable free plan and broad CI/CD coverage. Where it falls short: free plan is limited to one repository and one SCM or CI provider.
Switching from ThreatOpus? For most threat modeling software buyers the best ThreatOpus alternative is CAIRIS, built for teams needing broad, open-source threat modeling. On a budget, ThreatZ starts at $499/user/mo. CYMETRIS offers the most project limit (5 projects).
Why People Look for a ThreatOpus Alternative
- 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
Quick Picks by What You Need
- Best overallCAIRIS9.4
Teams needing broad, open-source threat modeling
Visit CAIRIS - Lowest priceThreatZ8.4
Paid plans from $499/user/mo
Visit ThreatZ - Best free optionCAIRIS9.4
Has a free plan
Visit CAIRIS - Most project limitCYMETRIS9.0
5 projects
Visit CYMETRIS
All 15 ThreatOpus Alternatives, Ranked
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.
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Best forTeams needing broad, open-source threat modeling
- Better than ThreatOpus:
- Editor score 9.4 vs 9.1
A broad open-source choice for teams connecting threats, requirements, architecture, and risk.
- Attack-path analysis
- Collaborative review
- Risk prioritization
9.4/10★★★★★Visit CAIRIS -
Best forOrganizations wanting integrations and automated modeling
- Better than ThreatOpus:
- Editor score 9.3 vs 9.1
A flexible threat-modeling platform with automation, integrations, and a useful free tier.
- Collaborative review
- Risk prioritization
- Templates and frameworks
9.3/10★★★★★Visit IriusRisk -
Best forCloud-native teams needing AI-assisted modeling
- Better than ThreatOpus:
- Editor score 9.2 vs 9.1
AI-assisted threat modeling with attack paths, risk prioritization, compliance, and CI/CD checks.
- Attack-path analysis
- Risk prioritization
- Templates and frameworks
9.2/10★★★★★Visit ThreatModeler -
Best forAutomotive teams running ISO/SAE 21434 TARA
A focused TARA platform for automotive teams managing ISO/SAE 21434 risk.
- Attack-path analysis
- Collaborative review
- Risk prioritization
9.0/10★★★★☆Visit CYMETRIS -
Best forLifecycle teams needing configurable risk analysis
A configurable TARA workspace for lifecycle teams modeling threats, risks, and countermeasures.
- Attack-path analysis
- Collaborative review
- Risk prioritization
8.9/10★★★★☆Visit itemis SECURE -
Best forAutomotive programs needing traceable cybersecurity cases
A traceable threat-modeling workspace for automotive cybersecurity programs.
- Attack-path analysis
- Collaborative review
- Risk prioritization
8.8/10★★★★☆Visit KAVACH -
Best forMature teams using attack-tree workflows
A focused attack-tree workbench for structured threat analysis and engineering traceability.
- Attack-path analysis
- Collaborative review
- Risk prioritization
8.6/10★★★★☆Visit EnCo Software -
Best forLarge enterprises needing compliance automation
A broad enterprise platform for automated modeling, compliance mapping, and DevSecOps workflows.
- Collaborative review
- Risk prioritization
- Templates and frameworks
8.5/10★★★★☆Visit SD Elements -
Best forAutomotive enterprises needing full assurance workflows
A broad automotive threat modeling suite for enterprises managing assurance across complex programs.
- Attack-path analysis
- Collaborative review
- Risk prioritization
8.4/10★★★★☆Visit ThreatZ -
Best forCloud teams modeling infrastructure continuously
CloudModeler connects live cloud and IaC changes to prioritized risks and attack paths.
- Attack-path analysis
- Risk prioritization
- Templates and frameworks
8.3/10★★★★☆Visit CloudModeler -
Best forDevelopers wanting free structured threat modeling
A free, structured threat-modeling ecosystem for developers and version-controlled workflows.
- Templates and frameworks
8.2/10★★★★☆Visit site -
Best forFree teams using structured threat statements
A free, structured threat-modeling ecosystem with diagrams, exports, and AI tooling.
- Collaborative review
- Risk prioritization
- Templates and frameworks
8.1/10★★★★☆Try Threat Composer -
Best forSmall teams wanting collaborative free modeling
A capable free threat modeling workspace for small teams that need shared analysis.
- Attack-path analysis
- Collaborative review
- Risk prioritization
8.0/10★★★★☆Visit ThreatTree -
Best forTechnical teams needing graph-based attack analysis
A graph-based open-source threat modeling platform for technical security analysis.
- Attack-path analysis
- Collaborative review
- Risk prioritization
7.9/10★★★★☆Visit Dethernety -
Best forWindows users needing a free STRIDE tool
A free Windows STRIDE tool with diagrams, prioritization, templates, validation, and reports.
- Collaborative review
- Risk prioritization
- Templates and frameworks
7.8/10★★★★☆Visit Microsoft
ThreatOpus Alternatives: Common Questions
What is the best alternative to ThreatOpus?
CAIRIS: #1 in our Threat Modeling Software ranking, with an editor score of 9.4 out of 10. A broad open-source choice for teams connecting threats, requirements, architecture, and risk.
Is there a free alternative to ThreatOpus?
Yes. CAIRIS, IriusRisk, ThreatModeler Nexus, AWS Threat Composer and Threat Composer have a free plan or a free tier (8 of the 15 alternatives on this page).
Why do people look for ThreatOpus alternatives?
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.
Which ThreatOpus alternative has the most project limit?
CYMETRIS, with 5 projects.
How do I switch from ThreatOpus?
Export your data from ThreatOpus (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel ThreatOpus.
How to Switch from ThreatOpus
- Export your data from ThreatOpus (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel ThreatOpus.
ThreatOpus vs Each Alternative
| # | Tool | Free plan | Paid from | Attack-path analysis | Risk prioritization | Deployment | Score |
|---|---|---|---|---|---|---|---|
| 4 | ThreatOpus | Yes | £129.99/mo | Yes | Yes | Both | 9.1 |
| 1 | CAIRIS | Yes | Free | Yes | Yes | Both | 9.4 |
| 2 | IriusRisk | Yes | Yes | Both | 9.3 | ||
| 3 | ThreatModeler Nexus | Yes | Yes | Yes | Both | 9.2 | |
| 4 | CYMETRIS | No | €99/mo | Yes | Yes | Both | 9.0 |
| 5 | itemis SECURE | Yes | Yes | Both | 8.9 | ||
| 6 | KAVACH | No | Yes | Yes | Both | 8.8 | |
| 7 | EnCo SOX ATA | Yes | Yes | 8.6 | |||
| 8 | SD Elements | No | Yes | Both | 8.5 | ||
| 9 | ThreatZ | No | $499/user/mo | Yes | Yes | Both | 8.4 |
| 10 | ThreatModeler CloudModeler | Yes | Yes | Cloud | 8.3 | ||
| 11 | AWS Threat Composer | Yes | Free | Both | 8.2 | ||
| 12 | Threat Composer | Yes | Free | Yes | Both | 8.1 | |
| 13 | ThreatTree | Yes | Yes | Yes | Cloud | 8.0 | |
| 14 | Dethernety | Free | Yes | Yes | Self_hosted | 7.9 | |
| 15 | Microsoft Threat Modeling Tool | Yes | Free | Yes | 7.8 |
Head-to-Head
- ThreatOpus vs CAIRIS
- ThreatOpus vs IriusRisk
- ThreatOpus vs ThreatModeler Nexus
- ThreatOpus vs CYMETRIS
- ThreatOpus vs itemis SECURE
- ThreatOpus vs KAVACH
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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