Zvec is an open-source, in-process vector database — lightweight, lightning-fast, and designed to embed directly into applications. Built on Proxima (Alibaba’s battle-tested vector search engine), it delivers production-grade, low-latency, scalable similarity search with minimal setupThis document demonstrates to leverage Zvec within the LangChain ecosystem. In particular, it shows how to install Zvec, and how to use it as a VectorStore plugin in LangChain.