Compare

Treblle vs Vellum

Vellum scores higher on the AgentReady, 88/100 against 55/100. They differ on 13 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

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

Vellum. A personal AI assistant that lives in the secure Vellum Cloud, has its own identity, and actually does things in the world.

Where Vellum is ahead

Vellum 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 understand: openapi / spec quality, request examples provided, response examples provided and errors and status codes documented. Treblle misses those.

And on adopt, self-service signup, no mandatory sales call, programmatic credential creation and fast time to first request. Treblle misses those.

Finally, on operate, structured, predictable output, machine-readable errors and retry behavior documented. Treblle misses those.

What neither does

Both fail authentication documented, limits / constraints 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. Vellum leads 100 to 87. Treblle misses llms.txt published, llms-full.txt / full agent docs; Vellum misses nothing.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Vellum leads 85 to 38. Treblle misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Vellum misses authentication documented, limits / constraints documented.

Adopt. Vellum leads 100 to 60. Treblle misses self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request; Vellum misses nothing.

Operate. Vellum leads 67 to 35. Treblle misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Vellum misses idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Treblle starts at $233/mo with no free tier. Vellum starts at $30/mo and has a free tier.

Signal by signal

Which to pick

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

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