Vector Database GitHub Repositories (2026) · Open Source Tools

Stop renting your intelligence. Own it with AnythingLLM. Everything you need for a powerful local-first agent experience

[MLsys2026 Best Paper]: https://arxiv.org/abs/2506.08276. RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate, and 100% private RAG application on your personal device.

📑 PageIndex: Document Index for Vectorless, Reasoning-based RAG

LlamaIndex is the document processing platform for AI

Qdrant - High-performance, massive-scale Vector Database and Vector Search Engine for the next generation of AI. Also available in the cloud https://cloud.qdrant.io/

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory with small models for free

OpenCode plugin that gives coding agents persistent memory using local vector database

Not another ChatGPT wrapper. This is a local-first tool that turns your notes, web pages, PDFs and audio/video into a personal knowledge graph — running entirely on your own machine.

Local-first AI agent memory with a knowledge graph, ontology constraints, and traceable reasoning—all in one SQLite file.

A lightweight, lightning-fast, in-process vector database

One Postgres for your application data, full-text search, vector retrieval, and aggregations. Home of the pg_search extension.

LangChain4j is an idiomatic, open-source Java library for building LLM-powered applications on the JVM. It offers a unified API over popular LLM providers and vector stores, and makes implementing tool calling (including MCP support), agents and RAG easy. It integrates seamlessly with enterprise Java frameworks like Quarkus and Spring Boot.

MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.

Developer-friendly OSS embedded retrieval library for multimodal AI. Search More; Manage Less.

Self-evolving Context Database for AI Agents. Unify Agent Memory, Knowledge RAG and Skills.

Milvus is a high-performance, cloud-native vector database built for scalable vector ANN search

Enterprise-grade (40m+ LOC) codebase intelligence, zero-setup, local & private Plugin/Skill/Extension or MCP: hybrid semantic search, polyglot dependency graphs, symbol-level impact analysis & call-flow, interactive HTML viewer, cross-project & branch-aware search, DB/API/infra knowledge. 61% less tokens, 84% fewer calls, 37x faster. Cloud in beta.

The Agentic Framework of the PHP ecosystem to build production-ready AI driven applications. Connect components (LLMs, Tools, vector DBs, memory) to agents that interact with your data and UI.

HelixDB is an OLTP graph database with native vector and full-text search built in Rust on Object Storage.

Data Agent Ready Warehouse : One for Analytics, Search, AI, Python Sandbox. — rebuilt from scratch. Unified architecture on your S3.