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Fly.io vs SuperTokens

SuperTokens scores higher on the AgentReady, 54/100 against 53/100. They differ on 9 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Fly.io. Fly.io provides real hardware-isolated Linux computers (called Sprites and Machines) for agents, evals, and tools, with a pay-as-you-go model where billing goes to zero when not in use.

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

Where Fly.io is ahead

Fly.io 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 and agent compatibility verified. SuperTokens misses those.

Where SuperTokens is ahead

SuperTokens passes clear product positioning and llms-full.txt / full agent docs, and Fly.io does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds understand: authentication documented. Fly.io misses it.

And on adopt, no mandatory sales call, free trial or free allowance and copyable quickstart. Fly.io misses those.

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. 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. SuperTokens leads 100 to 80. Fly.io misses clear product positioning, llms-full.txt / full agent docs; SuperTokens misses nothing.

Understand. SuperTokens leads 31 to 23. Fly.io misses structured api reference, openapi / spec quality, authentication documented, 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. SuperTokens leads 60 to 55. Fly.io misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation, free trial or free allowance, fast time to first request, copyable quickstart; SuperTokens misses self-service signup, agent-compatible signup flow, programmatic credential creation, fast time to first request.

Operate is whether an agent can run against it in production and recover when a call fails. Fly.io leads 53 to 24. Fly.io misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; SuperTokens misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified.

Pricing

Fly.io starts at $29/mo. 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: Fly.io and SuperTokens. Alternatives to each: Fly.io, SuperTokens.

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