Milvus
Billion-scale vector search
SingleStore: Vector Databases
Founded 2011|San Francisco, CA|501-1000 employees
What is SingleStore?
SingleStore is a real-time, unified, distributed SQL database that combines transactional, analytical, and vector data workloads in a single platform. MySQL and MongoDB wire protocol-compatible, SingleStore enables organizations to scale from one to one million customers, handling SQL, JSON, full text, and vector workloads all in one unified platform. Unlike traditional vector databases, SingleStore stores vector data in relational tables alongside other types of data, allowing easy querying of extended metadata and other attributes with the full power of SQL. The system supports both semantic search using FLAT, IVF_FLAT, IVF_PQ, IVF_PQFS, HNSW_FLAT, and HNSW_PQ vector indexes, with dot product and Euclidean distance for similarity matching. Founded in 2011 and headquartered in San Francisco, SingleStore serves hundreds of customers including 100+ Fortune 500, Forbes Global 2000, and Inc. 5000 brands. The company was acquired by Vector Capital in September 2025.
Strengths and tradeoffs
What this tool does well, and the limitations to keep in mind.
Pros
- Unified platform combining transactional, analytical, and vector workloads
- Co-located vector data with relational data for powerful SQL queries
- Multiple vector index types (FLAT, IVF_FLAT, IVF_PQ, HNSW_FLAT, HNSW_PQ)
- MySQL and MongoDB wire protocol compatibility for easy integration
- Proven at scale with 100+ Fortune 500 customers
Cons
- More complex than dedicated vector databases for pure vector search use cases
- Pricing not transparently published
- May have higher learning curve for teams unfamiliar with distributed SQL
- Recent acquisition may lead to product changes
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Try Respan freeBest SingleStore alternatives & competitors
Top companies in Vector Databases you can use instead of SingleStore.
Pinecone
Fully managed serverless vector database
Qdrant
High-performance open-source vector search
Chroma
Lightweight embedded vector database
Supabase
pgvector hosting
Weaviate
Open-source vector database
Neo4j
Native graph database with Cypher query language
MongoDB Atlas Vector Search
Elasticsearch
Redis Vector
ClickHouse
Analytics + vector
Neon
Serverless Postgres
TigerGraph
Vespa
LanceDB
Turbopuffer
ArangoDB
Compare SingleStore
Side-by-side comparisons with other tools in this category.
Best integrations for SingleStore
Companies from adjacent layers in the AI stack that work well with SingleStore.
