GENIEE, a Tokyo-based ad tech company founded in 2010, has expanded its use of ClickHouse to include data aggregation, leading to faster reporting, improved system stability, and lower costs. The decision was made after facing challenges with their old system that relied on Apache Kafka for streaming data and Apache Flink for data aggregation. GENIEE's new data architecture is centered around two ClickHouse clusters working in tandem to streamline and stabilize their data processing. This has resulted in significant improvements in speed, stability, and scalability, allowing the company to deliver more timely and valuable insights to clients.