Weaviate

Weaviate is an open-source AI-native vector database developed by Weaviate B.V., headquartered in Amsterdam. It combines vector similarity search with keyword filtering, retrieval-augmented generation and reranking in a single query, with automatic vectorisation at import via integrated model providers (OpenAI, Cohere, HuggingFace and others) or pre-computed embeddings. Production features include built-in multi-tenancy, replication and RBAC. Deployment options are self-hosted (free, BSD-3-licensed), Serverless Cloud from USD 25 per million vector dimensions per month, or Enterprise Cloud and BYOC Kubernetes packages on quote.