zvec

Alibaba Tongyi Lab's in-process vector database (Apache-2.0), the SQLite of vector search: it embeds directly into your app with no server to run. Wraps the production Proxima engine, does dense and sparse vectors, hybrid search (similarity plus structured filters), and write-ahead logging for crash safety. Python/Node/Rust/Go bindings. In-process means one writer at a time and no clustering, so reach for a server like Milvus or Qdrant when you need many writers.