Vectra

Vectra is a lightweight, local, file-backed, in-memory vector database designed for Node.js (v22.x+) and browser environments. Currently at version 0.14.0, it follows an active release cadence, introducing significant features and occasional breaking changes. Its key differentiators include operating entirely locally with a file-system backend (each index corresponds to a folder on disk), offering Pinecone-compatible metadata filtering, and integrating hybrid BM25 keyword search for advanced Retrieval-Augmented Generation (RAG) pipelines. The package also provides an optional gRPC server for cross-language access, comprehensive browser and Electron support via a dedicated `vectra/browser` entry point, and the capability to use local embeddings with HuggingFace models without requiring external API keys. Data storage can be optimized using Protocol Buffers for more compact files.