SingleStore

SingleStore is a distributed, real-time SQL database built to handle both transactional and analytical workloads in one system (HTAP), so applications can ingest streaming data and run fast analytics on it simultaneously — without separate operational and analytical databases. Formerly MemSQL, it combines in-memory speed with disk-based scale, uses a distributed architecture for horizontal scaling, and is wire-compatible with MySQL, letting teams power real-time dashboards, operational analytics, and data-intensive applications on a single platform.

The platform is engineered for speed and modern workloads. It ingests high-velocity data (including from Kafka and cloud object stores) and serves low-latency queries; supports both rowstore and columnstore in one engine; and adds vector search and full-text search, making it popular for AI applications (RAG, semantic search) that need fast similarity queries alongside SQL. Delivered as the managed Helios cloud service (and self-managed), it offers workspaces that separate compute, no charge for data ingress, and features like fast pipelines, so teams consolidate real-time analytics and app back ends.

SingleStore serves engineering and data teams building real-time, data-intensive, and AI applications. Its Helios cloud uses credit-based, usage pricing with a free Shared tier for testing, a Standard edition around $0.99 per credit-hour, and an Enterprise edition around $1.49 per credit-hour (adding disaster recovery, audit logging, and encryption key management); reserved workspaces start around $374/month (S-00) and scale up, with ~25% savings for reserved capacity. It competes with ClickHouse, Snowflake, CockroachDB, and Redis, differentiating on unified transactions-plus-analytics with vector search.