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Apollo vs SerpApi

Apollo scores higher on the AgentReady, 64/100 against 44/100. They differ on 7 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.

SerpApi. SerpApi is a service that provides APIs to scrape search engine results pages (SERPs) from multiple search engines and platforms, offering structured data for various use cases including SEO, AI/LLM insights, ecommerce, and more.

Where Apollo is ahead

Apollo passes public docs discoverable and machine-readable metadata, and SerpApi 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 and limits / constraints documented. SerpApi misses those.

And on adopt, self-service signup and agent-compatible signup flow. SerpApi misses those.

Finally, on operate, agent compatibility verified. SerpApi misses it.

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 73. Apollo misses llms-full.txt / full agent docs; SerpApi misses public docs discoverable, llms-full.txt / full agent docs, machine-readable metadata.

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; SerpApi misses structured api reference, openapi / spec quality, authentication documented, 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 45. Apollo misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart; SerpApi misses self-service signup, no mandatory sales call, agent-compatible signup flow, programmatic credential creation, fast time to first request, copyable quickstart.

Operate. Apollo leads 56 to 35. Apollo misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; SerpApi misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Apollo does not publish a machine-readable starting price and has a free tier. SerpApi does not publish one with no 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 SerpApi. Alternatives to each: Apollo, SerpApi.

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