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Braintrust vs Humanloop

Braintrust scores higher on the AgentReady, 55/100 against 51/100. They differ on 6 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Braintrust. Braintrust is the active observability platform for instrumenting, understanding, and improving agents.

Humanloop. The LLM evals platform for enterprises.

Where Braintrust is ahead

Braintrust passes self-service signup, fast time to first request and cli available, and Humanloop does not. That is adopt, whether an agent can get a key and make its first successful call without a human in the loop.

It also holds operate: structured, predictable output. Humanloop misses it.

Where Humanloop is ahead

Humanloop passes llms-full.txt / full agent docs, and Braintrust 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. Braintrust misses it.

What neither does

Both fail mcp discoverable, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented, no mandatory sales call, programmatic credential creation, mcp integration available, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified. 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. Humanloop leads 87 to 80. Braintrust misses llms-full.txt / full agent docs, mcp discoverable; Humanloop misses mcp discoverable.

Understand. Humanloop leads 38 to 23. Braintrust misses structured api reference, openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Humanloop misses 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. Braintrust leads 67 to 43. Braintrust misses no mandatory sales call, programmatic credential creation, mcp integration available; Humanloop misses self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request, cli available, mcp integration available.

Operate. Braintrust leads 50 to 35. Braintrust misses machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Humanloop misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Braintrust starts at $0/mo and has a free tier. Humanloop does not publish one and has a free tier.

Signal by signal

Which to pick

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

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