Caterpillar vs SkillScan: Side-by-Side Comparison (2026)

Short answer

Startup and SMB security teams adopting Claude Skills or similar AI agents need Caterpillar because it's the only free CLI scanner that catches permission escalation and credential theft in agent code before installation. It installs via curl with zero API key friction and covers both the ID.RA risk assessment and PR.PS platform hardening that NIST CSF 2.0 demands. Skip this if your organization needs post-deployment agent monitoring or runtime behavior analysis; Caterpillar stops threats at the gate, not in production. Teams deploying LangChain agents or OpenAI plugins at scale need SkillScan because it catches supply chain compromises in third-party skills before they hit production; most teams skip this layer entirely and rely on whatever the marketplace vendor claims is safe. It maps directly to NIST GV.SC, which most AI shops haven't even started thinking about, and the commit hash tracking means you'll actually know when a dependency gets updated and needs re-scanning. Skip this if your org treats AI agent integrations as one-off experiments; the scanning overhead only pays for itself when you're managing a growing inventory of tools across teams.