MyScale

ClickHouse is a columnar OLAP database with vector indexes (ANN via AMM, brute-force), supporting SQL queries over vectors + structured data at petabyte scale. Excels in aggregations with vectors. For analytics workloads with embeddings; faster ingestion than Postgres pgvector for big data.

Managed vector search service as part of Google Vertex AI, enabling efficient similarity search over high-dimensional vectors for AI applications.

Open-source search and analytics suite with native k-NN vector search capabilities.

Analytics and vector database supporting real-time analytics combined with vector search. Handles high-performance queries on large-scale datasets.

Embeddable SQL OLAP engine with VSS extension for low-latency HNSW vector search on local files, ideal for edge AI prototyping and analytics. SQL-first approach for on-device vector ops vs cloud vector DBs like Qdrant.

Real-time analytics database with vector search capabilities, built on RocksDB with converged indexing. Acquired by OpenAI in 2024 to power retrieval infrastructure. This was a commercial service.