Qdrant

Qdrant is a high-performance, massive-scale vector database and search engine written in Rust for speed and reliability under high load. Uses HNSW algorithm for ANN search optimized for millions of vectors with high queries-per-second throughput. Features SIMD hardware acceleration (x86-x64, Neon), async I/O with io_uring for maximum disk throughput, and distributed architecture for horizontal scaling. Rust provides C++-like performance with memory safety guarantees. Perfect for production workloads requiring fast, stable, concurrent vector search. Available as open-source or managed cloud.