Compare

Comet vs Exa

Exa scores higher on the AgentReady, 92/100 against 68/100. 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

Comet. Comet is an end-to-end ML platform and LLM evaluation platform for developers.

Exa. Exa is a custom search engine built for AIs, offering an API to search the largest index of public web and private information.

Where Comet is ahead

Comet passes agent-compatible signup flow, and Exa does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

Where Exa is ahead

Exa passes openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented and limits / constraints documented, and Comet 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: programmatic credential creation. Comet misses it.

And on operate, structured, predictable output, machine-readable errors and rate-limit behavior predictable. Comet misses those.

What neither does

Both fail no mandatory sales call, retry behavior documented, idempotency support. 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 is whether an agent can read the docs and work out how the API behaves before calling it. Exa leads 100 to 38. Comet misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Exa misses nothing.

Adopt. Exa leads 81 to 80. Comet misses no mandatory sales call, programmatic credential creation; Exa misses no mandatory sales call, agent-compatible signup flow.

Operate. Exa leads 88 to 53. Comet misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Exa misses retry behavior documented, idempotency support.

Pricing

Comet does not publish a machine-readable starting price and has a free tier. Exa starts at $0 (free tier with credits) and has a free tier.

Signal by signal

Which to pick

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

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