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Testfully vs Treblle

Treblle scores higher on the AgentReady, 55/100 against 49/100. 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

Testfully. A single product to build, test, document and monitor APIs.

Treblle. Enterprise Runtime Intelligence Platform for API visibility, security, and governance.

Where Testfully is ahead

Testfully passes llms.txt published and llms-full.txt / full agent docs, and Treblle does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: self-service signup. Treblle misses it.

Where Treblle is ahead

Treblle passes mcp discoverable, and Testfully does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: copyable quickstart, official python sdk and mcp integration available. Testfully misses those.

And on operate, observable execution. Testfully misses it.

What neither does

Both fail 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, fast time to first request, structured, predictable output, 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. Both sit at 87/100 here. Testfully misses mcp discoverable; Treblle misses llms.txt published, llms-full.txt / full agent docs.

Understand. Both sit at 38/100 here. Testfully misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Treblle 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. Treblle leads 60 to 48. Testfully misses no mandatory sales call, programmatic credential creation, fast time to first request, copyable quickstart, official python sdk, mcp integration available; Treblle misses self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request.

Operate. Treblle leads 35 to 24. Testfully misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, observable execution, agent compatibility verified; Treblle misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Testfully does not publish a machine-readable starting price and has a free tier. Treblle starts at $233/mo with no free tier.

Signal by signal

Which to pick

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

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