dotnet/orleans

Health v2 · maintenance only

Adoption not part of the score

10844 stars · 2134 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Microsoft Orleans is a cross-platform .NET framework for building robust, scalable distributed applications using the Virtual Actor Model. It extends familiar .NET concepts like objects, interfaces, and async/await to multi-server environments, handling clustering, persistence, transactions, and fault tolerance.

Use cases

• build scalable stateful cloud services in .NET
• model domain entities as virtual actors with stable identities
• add elastic scaling and load balancing to stateful services
• implement event sourcing and ACID transactions across distributed state
• run durable jobs, timers, and reminders in a cluster
• stream and process events between producers and consumers
• migrate single-server .NET apps to distributed cloud architecture

When to choose

• you are building stateful distributed services on .NET
• you want actor-model semantics without managing actor lifecycles
• you need built-in clustering, persistence, and fault tolerance
• you want turn-based concurrency to avoid locking
• you need proven large-scale production usage (used across Microsoft)

When to avoid

• your stack is not .NET
• you need stateless microservices only
• you want fine-grained control over actor placement and messaging
• your team is unfamiliar with actor-model thinking
• you need a lightweight library rather than a full runtime framework

Facets

framework · maturity stable

microservices concurrency streaming caching middleware microservices cloud-computing backend web-development dotnet cross-platform cloud windows actor-model virtual-actors grains distributed-actors cloud-native event-sourcing transactions reminders stateful-services linux macos docker kubernetes

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