Onyx Platform is a commercial agentic ai security tool by Onyx Security. Repello MCP Gateway is a commercial agentic ai security tool by Repello AI. Compare features, ratings, integrations, and community reviews side by side to find the best agentic ai security fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Mid-market and enterprise security teams deploying AI agents across multiple LLMs need Onyx Platform because it's the only control plane that catches shadow AI deployments and unapproved model usage before they become compliance violations. The natural language policy engine and real-time prompt injection blocking cover both governance (GV.PO) and continuous monitoring (DE.CM) without requiring security teams to become prompt engineers. Skip this if your organization runs fewer than three LLM integrations or if you need post-incident forensics more than active agent behavior enforcement; the session replay is solid but the tool's real strength is prevention during runtime, not reconstruction after the fact.
Mid-market and enterprise security teams deploying AI agents built on Model Context Protocol need Repello MCP Gateway because it's the only tool that actually stops tool poisoning attacks before they execute, not after. The platform covers four NIST CSF 2.0 functions (PR.PS, DE.CM, DE.AE, RS.MA) with genuine strength in continuous monitoring and anomaly detection on MCP traffic, catching the behavioral drift that generic API gateways miss. Skip this if your agents run on proprietary frameworks or if you're still in the "let's see what agents can do" phase; Repello is built for teams already committed to agent infrastructure at scale.
AI control plane for enterprise AI agent security, governance, and observability.
Security gateway for monitoring and protecting MCP-based AI agent tool calls.
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Common questions about comparing Onyx Platform vs Repello MCP Gateway for your agentic ai security needs.
Onyx Platform: AI control plane for enterprise AI agent security, governance, and observability. built by Onyx Security. headquartered in United States. Core capabilities include Real-time AI agent activity monitoring across LLMs and frameworks, Session replay and audit trail for compliance and forensics, Shadow AI and unapproved model deployment detection..
Repello MCP Gateway: Security gateway for monitoring and protecting MCP-based AI agent tool calls. built by Repello AI. headquartered in United States. 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.
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