Weaviate

Weaviate is an open-source, AI-native vector database designed to make building search and generative AI applications straightforward. Founded in 2019 by Bob van Luijt and headquartered in Amsterdam, Weaviate combines vector search with structured filtering and built-in modules that connect directly to embedding and generative models, so teams can run hybrid (keyword plus vector) search and retrieval-augmented generation without stitching together multiple systems.

It is available as open-source software and as the managed Weaviate Cloud. In October 2025 the company raised a $50 million Series C led by Battery Ventures and Index Ventures, with New Enterprise Associates, building on its earlier $50 million Series B.

Weaviate has become a favourite of developers who want an open, model-integrated database with a strong developer experience. Choose Weaviate when you want open-source ownership plus native model integration and hybrid search out of the box.