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Apollo vs Diffbot

Apollo scores higher on the AgentReady, 64/100 against 59/100. They differ on 8 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.

Diffbot. Diffbot builds AI models that read and transform the unstructured web into knowledge.

Where Apollo is ahead

Apollo passes clear canonical domain, and Diffbot does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: agent-compatible signup flow and cli available. Diffbot misses those.

And on operate, observable execution and agent compatibility verified. Diffbot misses those.

Where Diffbot is ahead

Diffbot passes llms-full.txt / full agent docs, and Apollo 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. Apollo misses it.

And on operate, structured, predictable output. Apollo misses it.

What neither does

Both fail 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, 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. Both sit at 93/100 here. Apollo misses llms-full.txt / full agent docs; Diffbot misses clear canonical domain.

Understand. Diffbot leads 54 to 38. Apollo misses structured api reference, openapi / spec quality, request examples provided, response examples provided, errors and status codes documented; Diffbot misses openapi / spec quality, request examples provided, response examples provided, errors and status codes documented.

Adopt. Apollo leads 70 to 55. Apollo misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart; Diffbot misses no mandatory sales call, agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart, cli available.

Operate is whether an agent can run against it in production and recover when a call fails. Apollo leads 56 to 35. Apollo misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Diffbot misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified.

Pricing

Apollo does not publish a machine-readable starting price and has a free tier. Diffbot starts at $0/mo and has a free tier.

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 Diffbot. Alternatives to each: Apollo, Diffbot.

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