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Cerbos vs Composio

Composio scores higher on the AgentReady, 97/100 against 46/100. They differ on 20 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Cerbos. Authorization management platform for applications, APIs, AI agents, MCP servers, services, and workloads.

Composio. Composio provides 1,000+ integrations with just-in-time tool calls, secure delegated auth, sandboxed environments, and parallel execution for AI agents.

Where Composio is ahead

Composio passes clear canonical domain, and Cerbos does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: structured api reference, openapi / spec quality, authentication documented, pricing understandable, request examples provided, response examples provided, errors and status codes documented and limits / constraints documented. Cerbos misses those.

And on adopt, self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request and cli available. Cerbos misses those.

Finally, on operate, structured, predictable output, machine-readable errors, rate-limit behavior predictable and agent compatibility verified. Cerbos misses those.

What neither does

Both fail retry behavior documented, idempotency support. If your agent needs any of those, you will be building it yourself either way.

Score, pillar by pillar

The AgentReady splits into four pillars, scored separately, because a product can be easy to find and still impossible to adopt.

Discover. Composio leads 100 to 93. Cerbos misses clear canonical domain; Composio misses nothing.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Composio leads 100 to 15. Cerbos misses structured api reference, openapi / spec quality, authentication documented, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Composio misses nothing.

Adopt. Composio leads 100 to 40. Cerbos misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request, cli available; Composio misses nothing.

Operate. Composio leads 89 to 35. Cerbos misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Composio misses retry behavior documented, idempotency support.

Pricing

Cerbos does not publish a machine-readable starting price. Composio does not publish one and has a free tier.

Signal by signal

Which to pick

Composio clears more of the signals an agent needs, so it is the safer default for unattended use. Full profiles: Cerbos and Composio. Alternatives to each: Cerbos, Composio.

An agent can fetch this as data: POST /v1/compare {"slugs": ["cerbos", "composio"]}