streaming-database
(2)
Materialize
Materialize is a New York-based data infrastructure company that builds a streaming SQL database. It continuously ingests data from operational systems, incrementally maintains the results of complex SQL queries as always-fresh materialized views, and serves them with low latency. Built on the open-source Timely Dataflow and Differential Dataflow engines and written in Rust, Materialize looks and behaves like Postgres, letting engineers use standard SQL to power real-time analytics, automation, personalization, fraud detection, and - more recently - a live context layer for AI agents and applications.
RisingWave
RisingWave is a distributed SQL streaming database that lets developers ingest, transform, and serve real-time data using familiar PostgreSQL-compatible SQL instead of specialized stream-processing frameworks. Founded in 2021 by former AWS Redshift engineer Yingjun Wu, the San Francisco company decouples compute from storage in a cloud-native architecture, offers incremental materialized views, and integrates natively with Apache Iceberg to power a streaming lakehouse. Its open-source engine and managed RisingWave Cloud target fraud detection, monitoring, real-time analytics, and increasingly the data infrastructure behind agentic AI.