Aeron is an efficient and reliable peer-to-peer message transport. It provides a replicated persistent log of messages via a number of media drivers, including HTTP, UDP and TCP. It also supports persistent storage of message streams for later replay. For many applications, Aeron may be overkill because it operates at a pretty low level (OSI Layer 4 conceptually), but it's peer-to-peer design and low (and predictable) latency are useful in a number of use cases. Indeed, we've found it to be useful in certain machine learning applications as well as playing a part in event-driven architectures. We think it's worth pointing out that alternative messaging protocols exist that don't require additional services such as Apache Kafka to be run.