Weaviate

Weaviate is an open-source vector database that excels in its modularity and ease of use. It allows users to store both objects and vectors, making it a versatile choice for applications that require a mix of structured and unstructured data. Weaviate's GraphQL interface makes querying intuitive, and its extensive module ecosystem allows for easy integration with various machine learning models. It is highly favored by developers who want a flexible, self-hostable solution that doesn't compromise on performance or feature depth.