Capsule Runtime Security for AI Agents vs Onyx Platform: Side-by-Side Comparison (2026)

Capsule Runtime Security for AI Agents: Runtime security platform for AI agents with discovery, observability, and enforcement. built by Capsule Security. Core capabilities include Agentless AI agent discovery across home-grown, SaaS, and endpoint environments, Agent Security Graph mapping agent-tool-data relationships at runtime, Real-time observability into agent actions, decisions, and execution paths..

Onyx Platform: AI control plane for enterprise AI agent security, governance, and observability. built by Onyx Security. 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..

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

Capsule Runtime Security for AI Agents differentiates with Agentless AI agent discovery across home-grown, SaaS, and endpoint environments, Agent Security Graph mapping agent-tool-data relationships at runtime, Real-time observability into agent actions, decisions, and execution paths. Onyx Platform differentiates with 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.

Capsule Runtime Security for AI Agents is developed by Capsule Security. Onyx Platform is developed by Onyx Security. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Capsule Runtime Security for AI Agents and Onyx Platform serve similar Agentic AI Security use cases: both are Agentic AI Security tools, both cover Agentic AI Security, AI Observability, LLM Guardrails. Review the feature comparison above to determine which fits your requirements.