CAPEC vs Heeler Runtime Threat Modeling: 2026 Comparison
CAPEC 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:
Threat modeling teams building attack surface inventories should start with CAPEC because it's the only free, publicly maintained dictionary that maps adversary tactics to the specific weaknesses they exploit, not just the vulnerabilities themselves. NIST includes CAPEC as the authoritative source for attack pattern classification, and it's structured specifically for red teams and architects to enumerate realistic attack chains before code is written. Skip this if your team needs automated threat discovery or integration with your existing risk register; CAPEC is a reference library, not a scanning or correlation engine.
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.
