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Vector Databases

Vector stores and similarity search engines for embeddings and retrieval.

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Pinecone

Fully managed vector database with serverless indexes and integrated embedding and reranking.

Free tierAPI key

Qdrant

Open-source vector search engine written in Rust, available self-hosted or as a managed cloud.

Free tierAPI key

Chroma

Developer-friendly open-source embedding database that runs in-process or as a server.

FreeNo auth

Cloudflare Vectorize

Vector database built into Workers for storing and querying embeddings close to your code.

Free tierAPI key

Weaviate

Open-source vector database with hybrid search and built-in vectorizer modules.

Free tierAPI key

Milvus

Open-source, highly scalable vector database, also offered as the managed Zilliz Cloud.

FreeNo auth

pgvector

Postgres extension that adds vector columns and similarity search to an ordinary database.

FreeNo auth

LanceDB

Embedded, serverless vector database storing data in an open columnar format.

FreeNo auth

Turbopuffer

Serverless search engine on object storage combining vector and full-text queries at low cost.

PaidAPI key

Redis Vector Search

Vector similarity and hybrid search inside Redis, handy when you already use it for caching.

Free tierAPI key

Weaviate Vector Search

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.

FreeNo auth

Qdrant Vector Search

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/

FreeNo auth

Milvus Vector Database

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

FreeNo auth

Weaviate with Generative Search

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.

FreeNo auth

Weaviate AI Agent Integration

Get an overview of the Weaviate Query Agent and what it can do.

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Faiss

A library for efficient similarity search and clustering of dense vectors.

FreeNo auth

Elasticsearch Vector Search

The dense_vector field type stores dense vectors of numeric values. Dense vector fields are primarily used for k-nearest neighbor (kNN) search. The dense_vector...

See siteSee docs

OpenSearch Vector Search

OpenSearch vector search provides a complete vector database solution for building efficient AI applications. Store and search vector embeddings alongside your...

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MongoDB Atlas Vector Search

Use MongoDB Vector Search to create vector indexes and perform vector search, including semantic search and hybrid search, on your vector embeddings in MongoDB.

See siteSee docs

Azure AI Search Vector Search

Learn about vector search in Azure AI Search for similarity matching across text, images, and multilingual content using numeric embeddings and vector indexes.

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Google Vertex AI Vector Search

Run queries to get nearest neighbors using the k-nearest neighbors algorithm.

See siteSee docs

OpenSearch (kNN plugin)

🔎 Open source distributed and RESTful search engine.

FreeNo auth

Vald

Vald. A Highly Scalable Distributed Vector Search Engine

FreeNo auth

Vearch

Distributed vector search for AI-native applications

FreeNo auth

Annoy

Approximate Nearest Neighbors in C++/Python optimized for memory usage and loading/saving to disk

FreeNo auth

HNSWlib

Header-only C++/python library for fast approximate nearest neighbors

FreeNo auth

NGT

Nearest Neighbor Search with Neighborhood Graph and Tree for High-dimensional Data

FreeNo auth

Redis with Vector Similarity (RedisAI)

A Redis module for serving tensors and executing deep learning graphs

FreeNo auth

ElasticSearch kNN Docker

Elasticsearch is a powerful open source search and analytics engine that makes data easy to explore.

See siteSee docs

Weaviate Operator for Kubernetes

A Kubernetes Operator to automate the management of Weaviate Database Clusters

FreeNo auth

LanceDB Python SDK

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

FreeNo auth

Qdrant Java Client

Official Java client for Qdrant .

FreeNo auth

Zilliz Cloud

Zilliz offers a fully managed Vector Lakebase powered by Milvus, unifying real-time vector search, lake-scale discovery, and AI data operations.

See siteSee docs

Marqo

AI-native search, recommendations, and merchandising trained on your catalog. Marqo delivers $130M+ in proven revenue for enterprise retailers.

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Qdrant Cloud (EU)

Managed cloud solution of the Qdrant vector search engine. Cloud-native vector database for high performant vector similarity search.

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VectorFlow

Connect, repeat and transform simple shapes into intricate vector artwork. Explore the VectorFlow workspace on Mac and iPad.

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RedisVector (AWS)

Amazon ElastiCache is a Valkey- and Redis OSS-compatible in-memory data store service that can be used as a database, cache, message broker, and queue for real-time applications.

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OpenSearch (AWS)

Amazon OpenSearch Service is a managed retrieval engine for AI and search at petabyte scale. Power RAG, semantic search, and observability with serverless scaling.

See siteSee docs

Marqo (Open-source)

Ecommerce Search and Discovery - marqo.ai.

FreeNo auth

DiskANN

A vector indexing library to bring fast, fresh and filtered search to your database

FreeNo auth

Elastic Search with k-NN plugin

Powered by Elasticsearch. Ready to deploy your data? Start free.

See siteSee docs

NMSLIB

Non-Metric Space Library (NMSLIB): An efficient similarity search library and a toolkit for evaluation of k-NN methods for generic non-metric spaces.

FreeNo auth

Cohere Vector Search API (free tier)

Cohere builds powerful models and AI solutions enabling enterprises to automate processes, empower employees, and turn fragmented data into actionable insights.

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OpenSearch Dashboards with k-NN

OpenSearch Dashboards is the web UI for OpenSearch. Use it to search and explore your data, build visualizations and dashboards, and manage your cluster...

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ZeroDB

*This project is no longer actively maintained. If you'd like to become the maintainer, please let us know.* ZeroDB is an end-to-end encrypted database.

FreeNo auth

AWS Marketplace Vector Databases

Evaluate vector databases for building RAG pipelines, agentic memory, and semantic search. Subscribe and start building in AWS Marketplace.

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Usearch

Fast single-file similarity search.

FreeNo auth