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/

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

Weaviate is an open-source vector database that stores both objects and vectors, allowing for the combination of vector search with structured filtering with the fault tolerance and scalability of a cloud-native database​.

Semantic cache for LLMs. Fully integrated with LangChain and llama_index.

ParadeDB is a modern Elasticsearch alternative built on Postgres. Built for real-time, update-heavy workloads.

Developer-friendly, embedded retrieval engine for multimodal AI. Search More; Manage Less.

🧠 AI-powered enterprise search engine 🔎

Fast Open-Source Search & Clustering engine × for Vectors & Arbitrary Objects × in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram 🔍

🚀 efficient approximate nearest neighbor search algorithm collections library written in Rust 🦀 .

A cross-platform video structuring (video analysis) framework. If you find it helpful, please give it a star: ) 跨平台的视频结构化（视频分析）框架，觉得有帮助的请给个星星 : )

Vald. A Highly Scalable Distributed Vector Search Engine

JVector: the most advanced embedded vector search engine

Collections of vector search related libraries, service and research papers

Up to 200x Faster Dot Products & Similarity Metrics — for Python, Rust, C, JS, and Swift, supporting f64, f32, f16 real & complex, i8, and bit vectors using SIMD for both AVX2, AVX-512, NEON, SVE, & SVE2 📐

🦛 CHONK your texts with Chonkie ✨ — The no-nonsense RAG chunking library

TensorFlow Similarity is a python package focused on making similarity learning quick and easy.

A @ClickHouse fork that supports high-performance vector search and full-text search.

🕸️🦀 A WASM vector similarity search written in Rust

Similarities: a toolkit for similarity calculation and semantic search. 相似度计算、匹配搜索工具包，支持亿级数据文搜文、文搜图、图搜图，python3开发，开箱即用。

Blazing fast framework for fine-tuning similarity learning models