Compare

Kinde vs Permit.io

Permit.io scores higher on the AgentReady, 79/100 against 54/100. They differ on 16 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Kinde. Modern auth and billing for engineers.

Permit.io. Permissions for the AI era.

Where Kinde is ahead

Kinde passes authentication 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 no mandatory sales call. Permit.io misses those.

Where Permit.io is ahead

Permit.io passes structured api reference, openapi / spec quality, request examples provided, response examples provided and errors and status codes documented, and Kinde 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: agent-compatible signup flow, programmatic credential creation, copyable quickstart, official typescript sdk, official python sdk and cli available. Kinde misses those.

And on operate, structured, predictable output and machine-readable errors. Kinde misses those.

What neither does

Both fail limits / constraints documented, 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.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Permit.io leads 85 to 31. Kinde misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Permit.io misses authentication documented, limits / constraints documented.

Adopt. Permit.io leads 70 to 48. Kinde misses agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, official typescript sdk, official python sdk, cli available; Permit.io misses self-service signup, no mandatory sales call, fast time to first request.

Operate. Permit.io leads 59 to 35. Kinde 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

Kinde starts at $25/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: Kinde and Permit.io. Alternatives to each: Kinde, Permit.io.

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