Apache Pulsar

Apache Pulsar is a distributed messaging and streaming platform built for cloud environments. Its layered architecture enables rapid scaling across numerous nodes without data reshuffling. Pulsar supports both individual message acknowledgement (RabbitMQ style) and cumulative per-partition acknowledgement, facilitating use cases from distributed work queues to order-preserving data streams. Key features include multi-tenancy with resource separation and access control, geo-replication across regions for disaster recovery, and tiered storage. It simplifies application architecture by supporting up to one million unique topics within a single cluster. It is designed for high throughput and low latency, making it suitable for real-time analytics, event-driven microservices, and data integration pipelines.