materialized-views
(3)
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.
DeltaStream
DeltaStream is a Menlo Park-based company building a unified, serverless stream processing platform on top of Apache Flink. Founded in 2021 by Hojjat Jafarpour, the creator of ksqlDB, it lets teams build real-time streaming applications and pipelines using SQL - without wrestling with Flink's operational complexity. Its Fusion platform combines streaming, real-time, and batch analytics into a single serverless experience, integrating with Kafka, Kinesis, Snowflake, Databricks, and Apache Iceberg. The company has raised $25M total, backed by NEA, Galaxy Interactive, and Sanabil.
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.