Awesome Vector Search Engine
A curated list of awesome vector search framework/engine, library, cloud service and research papers to vector similarity search
Standalone Service
- Apache Cassandra 5.0 – Vector search (cep-30), Strict Serialisable ACID (cep-15), horizontally scaling database
- Qdrant - Vector Similarity Search Engine with extended filtering support
- Vald - A Highly Scalable Distributed Vector Search Engine
- Milvus - A cloud-native vector database with high-performance and high scalability.
- Weaviate - A cloud-native, real-time vector search engine
- Omnigraph - Typed graph database where agents branch and merge like Git. S3-native, Rust, traversal + vector + BM25 in one runtime
- OpenDistro Elasticsearch KNN - A machine learning plugin which supports an approximate k-NN search algorithm for Open Distro for Elasticsearch
- Elastiknn - Elasticsearch plugin for nearest neighbor search
- Epsilla - A High Performance Vector Database Management System, Hippocampus For AI
- Vearch - A scalable distributed system for efficient similarity search of deep learning vectors
- pgANN - Fast Approximate Nearest Neighbor (ANN) searches with a PostgreSQL database
- Jina - Jina allows you to build deep learning-powered search-as-a-service.
- Infinity - The AI-native database built for LLM applications, providing incredibly fast vector and full-text search
- Aquila DB - Distribution focused k-NN search algorithm
- Redis HNSW - A redis module for similarity search based on HNSW
- Solr - Apache Solr - has a Dense Vector Search feature as of Solr 9.0
- Marqo - A semantic search engine which supports tensor search (sequence of vectors)
- txtai - Build semantic search applications and workflows
- Semantra - A multipurpose tool for semantically searching documents.
- SuperDuperDB - Bring AI to your favorite database
- TensorDB - High Performance Vector Database Supporting Heterogeneous Computing
- JVector - a pure Java, zero dependency, embedded vector search engine, used by DataStax Astra DB and Apache Cassandra.
- VQLite - Simple and Lightweight Vector Search Engine
- Vexvault - 100% browser based, open source, scalable, simple, zero-cost vector search
- Vespa.ai - Text search engine and ... fast approximate vector search (ANN)
- Vespa's large-scale ANN search using HNSW-IF indexes is described here
Library
- LangStream - LangStream is an open-source project that combines the best of event-based architectures with the latest Gen AI technologies.
- CassIO - CassIO is the ultimate solution for seamlessly integrating Apache Cassandra® with generative artificial intelligence and other machine learning workloads
- JVector - A pure Java, zero dependency, embedded vector search engine used by some of the advanced distributed databases such as DataStax Astra DB & Apache Cassandra™
- Faiss - A library for efficient similarity search and clustering of dense vectors
- Distributed Faiss - Work with FAISS indexes which don't fit into a single server memory
- Autofaiss - Automatically create Faiss knn indices
- SimSIMD - Hardware-accelerated mixed-precision numerics library for dense and sparse vector math and search
- ScaNN - A library efficient vector similarity search at scale.
- NMSLIB - Non-Metric Space Library, an efficient similarity search library for generic non-metric spaces
- Annoy - C++ library with Python bindings to search for points
- FLANN - Library written in C++ and contains bindings for the following languages: C, MATLAB, Python, and Ruby
- LLM App - Open-source Python library for a real-time data KNN (K-Nearest Neighbors) indexing
- MRPT - Fast nearest neighbor search with random projection
- RPForest - Python library for approximate nearest neighbours search
- pgvector - Open-source vector similarity search extension for Postgres
- PASE - Ultra-High-Dimensional approximate nearest neighbor search extension for Postgres
- Pyserini - Toolkit for reproducible information retrieval research with sparse and dense representations
- NGT - Provides commands and a library for performing high-speed approximate nearest neighbor
- NearPy - Approximate search using different locality-sensitive hashing methods
- TOROS N2 - lightweight approximate Nearest Neighbor library
- PUFFINN - Parameterless and Universal Fast FInding of Nearest Neighbors
- SPTAG - A distributed approximate nearest neighborhood search (ANN) library
- PyNNDescent - A python nearest neighbor descent for approximate k nearest neighbors
- TarsosLSH - A Java library implementing practical nearest neighbour search algorithm for multidimensional vectors
- TorchPQ - Efficient implementations of Product Quantization and its variants using Pytorch and CUDA
- Granne - Graph-based retrieval of approximate nearest neighbors witten in rust
- Embeddinghub - A database built for machine learning embeddings
- Hora - Efficient approximate nearest neighbor search algorithm collections library written in Rust
- Voy - A WASM vector similarity search engine written in Rust
- altor-vec - In-browser HNSW vector search in JavaScript. 54KB WASM, sub-millisecond queries, no server required. npm install altor-vec
- Chroma - The open-source embedding database for building LLM apps in Python or JavaScript with memory
- USearch - Smaller & Faster Vector Search Engine for C++, Python, JavaScript, Rust, Java, GoLang, Wolfram
- Golang vector stores collection - Chroma, PGVector interfaces
- Scalable Vector Search (SVS) - A performance library for vector similarity search
- chromem-go - Embeddable vector database for Go with Chroma-like interface and zero third-party dependencies. In-memory with optional persistence.
- CocoIndex - An open-source ETL framework with realtime incremental processing to keep index fresh
- Moss - Sub-10ms semantic search engine for Voice & Conversational AI, built in Rust/WebAssembly for on-device / in-browser retrieval
Cloud Service
- DataStax Astra Vector - Multi-cloud, serverless vector DBaaS
- Epsilla Cloud - The fully managed serverless vector database with 10X faster, cheaper and better.
- MongoDB Atlas Vector Search - Multi-cloud vector search with filtering, horizontal scaling, etc.
- MyScale - A managed vector database based on ClickHouse
- Pinecone - Managed vector search with filtering, live index updates, horizontal scaling, and a lot more
- Redis Cloud - Managed vector database in Redis
- SemaDB Cloud - Easy-to-use managed vector database with a RESTful API
- Relevance AI - Vector Platform From Experimentation To Deployment
- Zilliz Cloud - Cloud-native service for Milvus
- Rivestack - Managed PostgreSQL with pgvector for AI workloads. Built-in SQL editor lets you query your database with natural language (automatically converted to vector embeddings). Free tier includes 2GB storage.
Research Papers
List of methods on how approximate vector search algorithm can be implemented more effciently.
- SPANN: Highly-efficient Billion-scale Approximate Nearest Neighborhood Search - NEURIPS 2021
- Revisiting the Inverted Indices for Billion-Scale Approximate Nearest Neighbors - ECCV 2018
- Accelerating Large-Scale Inference with Anisotropic Vector Quantization
- Billion-scale similarity search with GPUs
- Efficient and robust approximate nearest neighbor search using Hierarchical Navigable Small World graphs
- Optimization of Indexing Based on k-Nearest Neighbor Graph for Proximity Search in High-dimensional Data
- On Approximately Searching for Similar Word Embeddings - ACL 2016
