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ThreatModel SDK is a free threat modeling tool. Heeler Runtime Threat Modeling is a commercial threat modeling tool by Heeler. Compare features, ratings, integrations, and community reviews side by side to find the best threat modeling fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, company size fit, deployment model, here is our conclusion:
Development teams building threat models into CI/CD pipelines should adopt ThreatModel SDK for its lightweight Java integration and normalized data format, which eliminates manual threat intelligence mapping across disconnected tools. The 82 GitHub stars and free pricing reflect genuine adoption among teams automating threat extraction rather than maintaining spreadsheets. Skip this if your organization needs a visual threat modeling canvas or vendor-managed threat libraries; ThreatModel SDK is a programmatic foundation, not a UI-first platform.
Heeler Runtime Threat Modeling
Development and security leaders responsible for cloud application risk want threat models that stay current with actual runtime behavior, not static diagrams built once and ignored. Heeler Runtime Threat Modeling automatically decomposes applications and regenerates threat models as your infrastructure drifts, catching material changes to APIs and components in real time; this covers ID.RA and DE.CM rigorously while most tools cover only one. Skip this if your team needs threat modeling to feed into a broader GRC platform or if you're still managing monoliths where drift detection feels premature.
A minimalistic Java library for representing threat model data in a normalized way and automating threat intelligence extraction.
AI-powered continuous threat modeling for cloud applications in runtime
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Common questions about comparing ThreatModel SDK vs Heeler Runtime Threat Modeling for your threat modeling needs.
ThreatModel SDK: A minimalistic Java library for representing threat model data in a normalized way and automating threat intelligence extraction..
Heeler Runtime Threat Modeling: AI-powered continuous threat modeling for cloud applications in runtime. built by Heeler. headquartered in United States. Core capabilities include Automated application decomposition and component mapping, AI-generated threat model reports, Real-time drift detection and baseline monitoring..
Both serve the Threat Modeling market but differ in approach, feature depth, and target audience.
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