USearch – Smaller and Faster Single-File Vector Search Engine
Last week was insane for vector search. Weaviate raised $50M, and Pinecone raised $100M... That's a lot and makes you believe that vector search is hard. But it's not. I have spent the last couple of days implementing a single-file vector search engine from scratch, which is at least the tenth in the twenty years of my career. But this time, it's different. Instead of inventing a brand new algorithm and doing some crazy optimizations on the GPU, I: 1. took the standard HNSW algorithm, 2. fitted into 1000 lines of C++11 for portability, 3. added quantization and hardware-accelerated metrics,…
USearch – Smaller and Faster Single-File Vector Search Engine launched on May 3, 2023 with 21 votes, #1,556 of 4,910 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
USearch is a single-file vector search engine built on the standard HNSW algorithm, optimized for performance in approximately 1000 lines of C++11 code. It includes quantization and hardware-accelerated metrics, with language bindings for Python, JavaScript, Rust, and Java. Designed for developers who need efficient vector search without complex infrastructure, it achieves high throughput on standard cloud instances and is available as open-source software.
written from the facts on this page · September 2026
From the sources
Fast Open-Source Search & Clustering engine × for Vectors & Arbitrary Objects × in C++, C, Python, JavaScript, Rust, Java, Objective-C, Swift, C#, GoLang, and Wolfram 🔍 - unum-cloud/USearch
In the maker’s words, at launch
Last week was insane for vector search. Weaviate raised $50M, and Pinecone raised $100M... That's a lot and makes you believe that vector search is hard. But it's not. I have spent the last couple of days implementing a single-file vector search engine from scratch, which is at least the tenth in the twenty years of…
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