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Kinde vs Propelauth

Propelauth scores higher on the AgentReady, 59/100 against 54/100. They differ on 11 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.

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 Kinde is ahead

Kinde 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 adopt: no mandatory sales call. Propelauth misses it.

Where Propelauth is ahead

Propelauth passes limits / constraints 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, fast time to first request, copyable quickstart, official typescript sdk, official python sdk and cli available. Kinde misses those.

What neither does

Both fail structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, programmatic credential creation, structured, predictable output, machine-readable errors, 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. Kinde leads 100 to 80. Kinde misses nothing; Propelauth misses clear canonical domain, llms.txt published, llms-full.txt / full agent docs.

Understand. Propelauth leads 38 to 31. Kinde misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Propelauth misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented.

Adopt is whether an agent can get a key and make its first successful call without a human in the loop. Propelauth leads 80 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; Propelauth misses no mandatory sales call, programmatic credential creation.

Operate. Propelauth leads 39 to 35. Kinde misses structured, predictable output, machine-readable errors, 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

Kinde starts at $25/mo and has a free tier. Propelauth starts at $0/month and has a free tier.

Signal by signal

Which to pick

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

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