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Chroma vs Weaviate

Chroma scores higher on the AgentReady, 81/100 against 74/100. They differ on 14 of the 41 signals. Which ones decides whether an agent can adopt them without a person watching.

What each one is

Chroma. Open-source search infrastructure for AI.

Weaviate. Weaviate is an open-source, AI vector database designed to store and index both data objects and their vector embeddings, enabling advanced semantic search capabilities.

Where Chroma is ahead

Chroma passes openapi / spec quality, authentication documented, request examples provided and response examples provided, and Weaviate 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: no mandatory sales call and agent-compatible signup flow. Weaviate misses those.

And on operate, structured, predictable output and observable execution. Weaviate misses those.

Where Weaviate is ahead

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

It also holds understand: limits / constraints documented. Chroma misses it.

And on adopt, official typescript sdk and official python sdk. Chroma misses those.

Finally, on operate, idempotency support and rate-limit behavior predictable. Chroma misses those.

What neither does

Both fail retry behavior documented, 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. Weaviate leads 100 to 93. Chroma misses clear canonical domain; Weaviate misses nothing.

Understand is whether an agent can read the docs and work out how the API behaves before calling it. Chroma leads 92 to 62. Chroma misses limits / constraints documented; Weaviate misses openapi / spec quality, authentication documented, request examples provided, response examples provided.

Adopt. Both sit at 80/100 here. Chroma misses official typescript sdk, official python sdk; Weaviate misses no mandatory sales call, agent-compatible signup flow.

Operate. Chroma leads 59 to 53. Chroma misses retry behavior documented, idempotency support, rate-limit behavior predictable, agent compatibility verified; Weaviate misses structured, predictable output, retry behavior documented, observable execution, agent compatibility verified.

Pricing

Chroma does not publish a machine-readable starting price and has a free tier. Weaviate does not publish one and has a free tier.

Signal by signal

Which to pick

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

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