Vertex AI Matching Engine overview https://cloud.google.com/vertex-ai/docs/matching-engine/overview
Weaviate, an open source vector search engine https://weaviate.io/developers/weaviate#about-the-docs
Proxima: A Vector Retrieval Engine independently developed by Alibaba DAMO Academy https://www.alibabacloud.com/blog/proxima-a-vector-retrieval-engine-independently-developed-by-alibaba-damo-academy_597699