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Apollo vs Clearbit

Apollo scores higher on the AgentReady, 64/100 against 53/100. They differ on 5 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Apollo. The AI sales platform for smarter, faster revenue growth.

Clearbit. Clearbit is a B2B data provider that gathers public data from the web, proprietary data, and uses LLMs to convert unstructured information into precise and standardized data sets.

Where Apollo is ahead

Apollo passes llms.txt published, and Clearbit 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 and limits / constraints documented. Clearbit misses those.

And on adopt, self-service signup and free trial or free allowance. Clearbit misses those.

What neither does

Both fail llms-full.txt / full agent docs, structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes 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. Apollo leads 93 to 87. Apollo misses llms-full.txt / full agent docs; Clearbit misses llms.txt published, llms-full.txt / full agent docs.

Understand. Apollo leads 38 to 23. Apollo misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented; Clearbit misses structured api reference, 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. Apollo leads 70 to 50. Apollo misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart; Clearbit misses self-service signup, no mandatory sales call, programmatic credential creation, free trial or free allowance, fast time to first request, copyable quickstart.

Operate. Apollo leads 56 to 53. Apollo misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Clearbit misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable.

Pricing

Apollo does not publish a machine-readable starting price and has a free tier. Clearbit does not publish one.

Signal by signal

Which to pick

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

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