Weaviate develops and manages a cloud-native search engine that allows users to bring machine learning models to scale. It offers an open-source vector search engine that stores both objects and vectors and allows combining vector search with structured filtering with the fault-tolerance and scalability of a cloud-native database, all accessible through GraphQL, REST, and various language clients. It was formerly known as SeMi Technologies and changed its name to Weaviate in January 2023.