Caterpillar vs Repello AI SkillCheck: Side-by-Side Comparison (2026)

Caterpillar: CLI scanner that detects security threats in AI agent skills before installation. built by Alice. Core capabilities include Scan AI skill files and directories for security threats, Detect dangerous or excessive permission requests, Identify data exfiltration behaviors in skills..

Repello AI SkillCheck: Scans and catalogs AI agent skills/plugins for security vulnerabilities. built by Repello AI. Core capabilities include Browsable skill library of scanned AI skills, Skill upload for scanning, Severity-based classification of scanned skills..

Both serve the Agentic AI Security market but differ in approach, feature depth, and target audience.

Caterpillar differentiates with Scan AI skill files and directories for security threats, Detect dangerous or excessive permission requests, Identify data exfiltration behaviors in skills. Repello AI SkillCheck differentiates with Browsable skill library of scanned AI skills, Skill upload for scanning, Severity-based classification of scanned skills.

Caterpillar is developed by Alice. Repello AI SkillCheck is developed by Repello AI. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Caterpillar and Repello AI SkillCheck serve similar Agentic AI Security use cases: both are Agentic AI Security tools, both cover Security Scanning. Review the feature comparison above to determine which fits your requirements.