Weaviate

Weaviate is an open-source vector database that stores objects together with their embeddings. It supports hybrid search, which blends keyword matching with semantic similarity, so results are relevant in more situations. It can generate embeddings for you through built-in modules and connect directly to language models for retrieval augmented generation. You can run it yourself, in Weaviate Cloud, or inside your own cloud account. The open-source version is free, and the cloud service has a trial and paid plans. It is a flexible choice for teams that want openness and a rich feature set.