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Kinde vs SuperTokens

Kinde and SuperTokens score alike on the AgentReady. They differ on 6 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.

SuperTokens. Open source user authentication platform that helps developers build fast, maintain control, and reduce costs.

Where Kinde is ahead

Kinde passes self-service signup, and SuperTokens does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

It also holds operate: observable execution. SuperTokens misses it.

Where SuperTokens is ahead

SuperTokens passes copyable quickstart, official typescript sdk, official python sdk and cli available, and Kinde does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

What neither does

Both fail structured api reference, 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, 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.

Understand. Both sit at 31/100 here. Kinde misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; SuperTokens misses structured api reference, openapi / spec quality, 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. SuperTokens leads 60 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; SuperTokens misses self-service signup, agent-compatible signup flow, programmatic credential creation, fast time to first request.

Operate. Kinde leads 35 to 24. Kinde misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; SuperTokens misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified.

Pricing

Kinde starts at $25/mo and has a free tier. SuperTokens starts at $0.02/MAU and has a free tier.

Signal by signal

Which to pick

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

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