AkkaNET

Akka.NET is a toolkit and runtime for building highly concurrent, distributed, fault-tolerant event-driven applications on the .NET platform. It implements the actor model, in which lightweight units of computation called actors communicate exclusively by asynchronous messages, enabling isolation and resilient failure handling. Actors are lightweight, can be created and terminated dynamically, and supervision strategies aid in fault recovery by restarting or escalating failures. Location transparency allows actors to reside in different processes or machines, forming a distributed system.

Key features include an actor system for organization, Akka.Remote for distributed communication, Akka.Cluster for clustering and resilience across nodes, Akka.Persistence for event sourcing and state snapshots, and routing and supervision utilities. The framework emphasizes location transparency, allowing actors to span processes or machines, and supports patterns for fault tolerance, backpressure, and scalable concurrency. It integrates with .NET languages such as C# and F#, and supports .NET Framework and .NET Core (and newer .NET versions).

Akka.NET is an open-source port of the Akka toolkit from the Java/Scala ecosystem. It is maintained by the community under the Akka.NET project, distributed via NuGet packages, and released under the Apache 2.0 license. Applications built with Akka.NET aim to be scalable, responsive, and resilient, handling a high degree of concurrency through message passing rather than shared mutable state. Typical use cases include real-time analytics, chat and collaboration systems, IoT platforms, and distributed microservices.