Annoy vs Pgvector Comparison in 2025

Annoy

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

Pgvector

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pgvector: An open-source vector similarity search tool for Postgres. Store vectors with data, support exact & approximate search, and perform distance calculations. Suitable for recommendation systems, image/text retrieval, and anomaly detection.

Annoy

Launched
Pricing Model	Free
Starting Price
Tech used
Tag	Data Analysis,Developer Tools

Pgvector

Launched	2023
Pricing Model	Free
Starting Price
Tech used
Tag	Data Science,Vector Database,Data Analysis

Annoy Rank/Visit

Global Rank
Country
Month Visit

Top 5 Countries

Traffic Sources

Pgvector Rank/Visit

Global Rank	0
Country
Month Visit	0

Top 5 Countries

Traffic Sources

Estimated traffic data from Similarweb

What are some alternatives?

When comparing Annoy and Pgvector, you can also consider the following products

Vald - Vald: A scalable, high-performance AI search engine for recommendation systems, translation, and image recognition tasks. Automate indexing and enhance search capabilities with Vald.

Milvus - Discover Milvus, the popular vector database for enterprise users. Store, index, and manage large-scale embedding vectors with ease. Boost retrieval speed and create similarity search services using Milvus' advanced SDKs and indexing algorithms. Perfect for machine learning deployments and managing large-scale vector datasets.

Anannas - Anannas unifies 500+ LLMs via a single API. Simplify integration, optimize costs, and ensure 99.999% reliability for your enterprise AI apps.

AiPy - AiPy: AI assistant using Python. Works with any LLM (GPT, local models). Automate tasks, analyze data, build apps. Open source!