AI Shield M99 vs Repello MCP Gateway: Side-by-Side Comparison (2026)

AI Shield M99: AI agent kill switch with 6-level graduated response and 7-layer termination. built by Red Specter Security. Core capabilities include 6-level graduated response system with auto-escalation timers, 5-phase kill sequence across 7 infrastructure layers, Signal Skip for critical threats bypassing lower response levels..

Repello MCP Gateway: Security gateway for monitoring and protecting MCP-based AI agent tool calls. built by Repello AI. Core capabilities include Prompt injection detection and blocking, Tool poisoning attack detection, MCP traffic inspection and filtering..

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

AI Shield M99 differentiates with 6-level graduated response system with auto-escalation timers, 5-phase kill sequence across 7 infrastructure layers, Signal Skip for critical threats bypassing lower response levels. Repello MCP Gateway differentiates with Prompt injection detection and blocking, Tool poisoning attack detection, MCP traffic inspection and filtering.

AI Shield M99 is developed by Red Specter Security. Repello MCP Gateway is developed by Repello AI. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

AI Shield M99 and Repello MCP Gateway serve similar Agentic AI Security use cases: both are Agentic AI Security tools. Review the feature comparison above to determine which fits your requirements.