DataStax

Real-time database for AI applications, built on Apache Cassandra and now Vector search.

Stardog

Enterprise knowledge graph platform with semantic reasoning and natural language querying.

Elastic

Search-powered platform spanning observability, security, and search analytics.

MongoDB

Document database for modern apps with integrated vector search.

MotherDuck

Serverless DuckDB for hybrid local + cloud analytics.

ClickHouse

Open-source column-oriented database for real-time analytics.