Capsule Runtime Security for AI Agents vs Lunar.dev AI Gateway: 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..

Lunar.dev AI Gateway: API gateway for managing, securing, and observing outbound LLM traffic. built by Lunar.dev. Core capabilities include Rate limiting for LLM API calls per user, app, or agent, Priority queue for AI workloads to manage request urgency, Data sanitization to redact sensitive data from prompts and tool inputs..

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. Lunar.dev AI Gateway differentiates with Rate limiting for LLM API calls per user, app, or agent, Priority queue for AI workloads to manage request urgency, Data sanitization to redact sensitive data from prompts and tool inputs.

Capsule Runtime Security for AI Agents is developed by Capsule Security. Lunar.dev AI Gateway is developed by Lunar.dev. 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 Lunar.dev AI Gateway serve similar Agentic AI Security use cases: both are Agentic AI Security tools, both cover LLM Security, LLM Guardrails, Prompt Injection. Key differences: Capsule Runtime Security for AI Agents is Commercial while Lunar.dev AI Gateway is Free. Review the feature comparison above to determine which fits your requirements.