Flink

Apache Flink is the industry standard for high-performance, stateful stream processing and unified batch analytics.

Flink handles massive data volumes with sub-second latency by processing streams as they arrive. It excels at complex event processing (CEP) and maintaining large-scale state, ensuring exactly-once consistency even during hardware failures. Top-tier engineering teams at Netflix, Uber, and Alibaba use Flink to power real-time dashboards, fraud detection systems, and dynamic recommendation engines. Its flexible APIs (Java, Python, and SQL) allow developers to manage unbounded data sets with the same precision and reliability as traditional batch jobs.

https://flink.apache.org