Why it matters

Weaviate is popular open-source. Understanding shapes options.

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The architecture

HNSW-based ANN.

Hybrid: BM25 + vector via alpha weighting.

Generative modules.

GraphQL API.

Weaviate architectureHNSWvector indexBM25 hybridalpha weightingModulesgenerative + rerankweaviate.io; open source + hosted; GraphQL + REST API; modules extend
Weaviate.
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How it works end to end

Open-source Weaviate Cloud.

GraphQL + REST.

Modules (transformers, generative, rerank).