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AutoGen (AG2) vs Vellum

Vellum scores higher on the AgentReady, 88/100 against 53/100. 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

AutoGen (AG2). AG2 (formerly AutoGen) is an open-source multi-agent AI framework and AgentOS for building, orchestrating, and evolving systems of AI agents.

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 structured api reference, openapi / spec quality, request examples provided, response examples provided and errors and status codes documented, and AutoGen (AG2) does not. That is understand, whether an agent can read the docs and work out how the API behaves before calling it.

It also holds adopt: self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request and cli available. AutoGen (AG2) misses those.

And on operate, structured, predictable output, machine-readable errors and retry behavior documented. AutoGen (AG2) 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.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Vellum leads 85 to 23. AutoGen (AG2) misses structured api reference, 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 55. AutoGen (AG2) misses self-service signup, no mandatory sales call, programmatic credential creation, fast time to first request, cli available; Vellum misses nothing.

Operate. Vellum leads 67 to 35. AutoGen (AG2) 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

AutoGen (AG2) does not publish a machine-readable starting price and has a 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: AutoGen (AG2) and Vellum. Alternatives to each: AutoGen (AG2), Vellum.

An agent can fetch this as data: POST /v1/compare {"slugs": ["ag2", "vellum"]}