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Cloudflare vs Fly.io

Cloudflare scores higher on the AgentReady, 98/100 against 53/100. They differ on 10 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Cloudflare. One platform for your apps, agents, and workforce.

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.

Where Cloudflare is ahead

Cloudflare 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: structured api reference. Fly.io misses it.

And on adopt, free trial or free allowance. Fly.io misses it.

Where Fly.io is ahead

Fly.io passes search discoverable and public docs discoverable, and Cloudflare does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: official typescript sdk and official python sdk. Cloudflare misses those.

And on operate, canonical workflow succeeds and observable execution. Cloudflare misses those.

What neither does

Both fail openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, 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. Cloudflare leads 100 to 80. Cloudflare misses search discoverable, public docs discoverable; Fly.io misses clear product positioning, llms-full.txt / full agent docs.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Cloudflare leads 92 to 23. Cloudflare misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; 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.

Adopt. Cloudflare leads 100 to 55. Cloudflare misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, official typescript sdk, official python sdk; 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.

Operate. Cloudflare leads 100 to 53. Cloudflare misses canonical workflow succeeds, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution; Fly.io misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Cloudflare starts at $0/mo and has a free tier. Fly.io starts at $29/mo.

Signal by signal

Which to pick

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

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