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Kinde vs Stytch

Kinde scores higher on the AgentReady, 54/100 against 51/100. 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.

Stytch. The identity platform for humans & AI agents.

Where Kinde is ahead

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

It also holds understand: pricing understandable. Stytch misses it.

And on adopt, self-service signup, no mandatory sales call, free trial or free allowance and mcp integration available. Stytch misses those.

Where Stytch is ahead

Stytch passes structured api reference, 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: copyable quickstart, official typescript sdk and official python sdk. Kinde misses those.

And on operate, structured, predictable output. Kinde misses it.

What neither does

Both fail openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, agent-compatible signup flow, programmatic credential creation, fast time to first request, cli available, 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 87. Kinde misses nothing; Stytch misses mcp discoverable.

Understand. Stytch 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; Stytch misses openapi / spec quality, pricing understandable, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented.

Adopt is whether an agent can get a key and make its first successful call without a human in the loop. Kinde leads 48 to 29. Kinde misses agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, official typescript sdk, official python sdk, cli available; Stytch 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, mcp integration available.

Operate. Stytch leads 50 to 35. Kinde misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Stytch misses 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. Stytch does not publish one.

Signal by signal

Which to pick

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

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