apache/pekko

Health v2 · maintenance only

Flags: no_releases

Adoption not part of the score

1629 stars · 211 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Apache Pekko is an open-source JVM framework for building concurrent, distributed, and resilient message-driven applications using the Actor Model, with APIs for Java and Scala. It is an Apache-2.0-licensed fork of Akka 2.6.x and includes modules for persistence, streams, HTTP, gRPC, cluster sharding, and connectors such as Kafka.

Use cases

• build highly concurrent distributed applications on the JVM
• implement actor-based message-driven systems in Java or Scala
• run clustered applications with sharding and distributed data
• build event-sourced persistent services
• stream and process data reactively with backpressure
• replace Akka after its license change to BSL
• expose HTTP and gRPC APIs from actor systems

When to choose

• you need a permissive Apache-2.0 alternative to Akka
• you are building resilient, elastic distributed systems on the JVM
• you want actor-model concurrency with persistence, clustering, and streaming in one toolkit
• you need Java and Scala APIs for cluster sharding or Kafka integration

When to avoid

• you prefer lightweight async models like virtual threads or coroutines over the actor model
• your project is not on the JVM
• you need Windows-first development support, which has reported build issues
• you want a framework with a larger commercial ecosystem than the fork currently has

Facets

framework · maturity active

concurrency message-queue streaming http-server rpc web-framework workflow-automation microservices backend developer-tools jvm cross-platform actor-model akka-fork cluster-sharding event-sourcing reactive-streams message-driven resilience grpc kafka-connectors real-time docker kubernetes

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