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Exa vs Perplexity

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

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

Perplexity. Perplexity is an AI-powered search and answer platform that provides fast and accurate answers from trusted sources.

Where Exa is ahead

Exa passes clear canonical domain, clear product positioning and mcp discoverable, and Perplexity 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. Perplexity misses it.

And on adopt, self-service signup, free trial or free allowance, fast time to first request, cli available and mcp integration available. Perplexity misses those.

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

Where Perplexity is ahead

Perplexity passes idempotency support, and Exa does not. That is operate, whether an agent can run against it in production and recover when a call fails.

What neither does

Both fail no mandatory sales call, agent-compatible signup flow, retry behavior documented. 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. Exa leads 100 to 67. Exa misses nothing; Perplexity misses clear canonical domain, clear product positioning, mcp discoverable.

Understand. Exa leads 100 to 92. Exa misses nothing; Perplexity misses pricing understandable.

Adopt is whether an agent can get a key and make its first successful call without a human in the loop. Exa leads 81 to 35. Exa misses no mandatory sales call, agent-compatible signup flow; Perplexity misses self-service signup, no mandatory sales call, agent-compatible signup flow, free trial or free allowance, fast time to first request, cli available, mcp integration available.

Operate. Exa leads 88 to 76. Exa misses retry behavior documented, idempotency support; Perplexity misses retry behavior documented, agent compatibility verified.

Pricing

Exa starts at $0 (free tier with credits) and has a free tier. Perplexity does not publish one.

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: Exa and Perplexity. Alternatives to each: Exa, Perplexity.

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