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Permit.io vs Propelauth

Permit.io scores higher on the AgentReady, 79/100 against 59/100. They differ on 15 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Permit.io. Permissions for the AI era.

Propelauth. PropelAuth provides end-to-end managed user authentication specializing in B2B use cases, built for AI-native companies with multi-tenant auth requirements

Where Permit.io is ahead

Permit.io passes clear canonical domain, llms.txt published and llms-full.txt / full agent docs, and Propelauth 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, request examples provided, response examples provided and errors and status codes documented. Propelauth misses those.

And on adopt, programmatic credential creation. Propelauth misses it.

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

Where Propelauth is ahead

Propelauth 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 and fast time to first request. Permit.io misses those.

What neither does

Both fail no mandatory sales call, 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 80. Permit.io misses nothing; Propelauth misses clear canonical domain, llms.txt published, llms-full.txt / full agent docs.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Permit.io leads 85 to 38. Permit.io misses authentication documented, limits / constraints documented; Propelauth misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented.

Adopt. Propelauth leads 80 to 70. Permit.io misses self-service signup, no mandatory sales call, fast time to first request; Propelauth misses no mandatory sales call, programmatic credential creation.

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

Pricing

Permit.io does not publish a machine-readable starting price and has a free tier. Propelauth starts at $0/month 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: Permit.io and Propelauth. Alternatives to each: Permit.io, Propelauth.

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