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Best Open Source vector search Libraries

A curated list of the most popular GitHub repositories tagged with vector search. Select any project to visualize its architecture and dive into the codebase using RepoMind's AI engine.

#1redis/redis

For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

73,100C
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#2meilisearch/meilisearch

A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.

56,011Rust
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#3milvus-io/milvus

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

42,914Go
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#4dragonflydb/dragonfly

A modern replacement for Redis and Memcached

30,028C++
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#5qdrant/qdrant

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/

28,981Rust
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#6srbhr/Resume-Matcher

Improve your resumes with Resume Matcher. Get insights, keyword suggestions and tune your resumes to job descriptions.

26,002TypeScript
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#7typesense/typesense

Open Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch ⚡ 🔍 ✨ Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences

25,255C++
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#8Tencent/WeKnora

LLM-powered framework for deep document understanding, semantic retrieval, and context-aware answers using RAG paradigm.

13,064Go
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#9neuml/txtai

💡 All-in-one AI framework for semantic search, LLM orchestration and language model workflows

12,192Python
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#10yichuan-w/LEANN

[MLsys2026]: RAG on Everything with LEANN. Enjoy 97% storage savings while running a fast, accurate, and 100% private RAG application on your personal device.

9,999Python
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#11oceanbase/oceanbase

The Fastest Distributed Database for Transactional, Analytical, and AI Workloads.

9,979C++
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#12databendlabs/databend

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

9,160Rust
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#13activeloopai/deeplake

Database for AI. Store Vectors, Images, Texts, Videos, etc. Use with LLMs/LangChain. Store, query, version, & visualize any AI data. Stream data in real-time to PyTorch/TensorFlow. https://activeloop.ai

9,008C++
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#14vespa-engine/vespa

AI + Data, online. https://vespa.ai

6,789Java
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