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Logto vs Permit.io

Permit.io scores higher on the AgentReady, 79/100 against 58/100. They differ on 14 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Logto. Logto is an open-source authentication and identity platform built for developers, offering auth, SSO, and RBAC for SaaS, AI agents, and B2B apps.

Permit.io. Permissions for the AI era.

Where Logto is ahead

Logto passes authentication documented and limits / constraints documented, and Permit.io does not. That is understand, whether an agent can read the docs and work out how the API behaves before calling it.

It also holds adopt: self-service signup. Permit.io misses it.

Where Permit.io is ahead

Permit.io passes mcp discoverable, and Logto does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: openapi / spec quality, request examples provided, response examples provided and errors and status codes documented. Logto misses those.

And on adopt, programmatic credential creation, copyable quickstart, cli available and mcp integration available. Logto misses those.

Finally, on operate, structured, predictable output and machine-readable errors. Logto misses those.

What neither does

Both fail no mandatory sales call, fast time to first request, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified. 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. Permit.io leads 100 to 87. Logto misses mcp discoverable; Permit.io misses nothing.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Permit.io leads 85 to 54. Logto misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented; Permit.io misses authentication documented, limits / constraints documented.

Adopt. Permit.io leads 70 to 50. Logto misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, cli available, mcp integration available; Permit.io misses self-service signup, no mandatory sales call, fast time to first request.

Operate. Permit.io leads 59 to 39. Logto misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Permit.io misses retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Logto starts at $0/mo and has a free tier. Permit.io does not publish one and has a free tier.

Signal by signal

Which to pick

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

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