Compare

Comet vs Lightning

Comet scores higher on the AgentReady, 68/100 against 57/100. They differ on 5 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Comet. Comet is an end-to-end ML platform and LLM evaluation platform for developers.

Lightning. Lightning AI is a platform for building, training and deploying AI models.

Where Comet is ahead

Comet passes clear canonical domain and mcp discoverable, and Lightning does not. That is discover, whether an agent can find the product at all without being told it exists.

It also holds adopt: mcp integration available. Lightning misses it.

And on operate, agent compatibility verified. Lightning misses it.

Where Lightning is ahead

Lightning passes limits / constraints documented, and Comet does not. That is understand, whether an agent can read the docs and work out how the API behaves before calling it.

What neither does

Both fail openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, no mandatory sales call, programmatic credential creation, structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable. 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 is whether an agent can find the product at all without being told it exists. Comet leads 100 to 80. Comet misses nothing; Lightning misses clear canonical domain, mcp discoverable.

Understand. Lightning leads 46 to 38. Comet misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented, limits / constraints documented; Lightning misses openapi / spec quality, authentication documented, request examples provided, response examples provided, errors and status codes documented.

Adopt. Comet leads 80 to 65. Comet misses no mandatory sales call, programmatic credential creation; Lightning misses no mandatory sales call, programmatic credential creation, mcp integration available.

Operate. Comet leads 53 to 35. Comet misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable; Lightning misses structured, predictable output, machine-readable errors, retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified.

Pricing

Comet does not publish a machine-readable starting price and has a free tier. Lightning starts at $4.50/hr and has a free tier.

Signal by signal

Which to pick

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

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