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Reaqtor is a framework for reliable, stateful, distributed, scalable, high performance event processing based on Rx.

Reaqtor evolves Reactive Extensions (Rx) by adding state & durability primitives to enable long running "Rx as a Service" queries, for processing live or historic data streams.

Real world deployments of Reaqtor handle billions of standing stateful queries, processing thousands of events per second. It powers services across Bing, MSN, and M365.

It's just .NET, so you can host it on a Raspberry Pi, in a .NET Interactive Notebook, a Console App, or build your own durable cloud-native hosting environment if you need planet-scale, ultra-high density reactive processing.

Meet Reaqtor

A Little History of Reaqtor

A Little History of Reaqtor

Reaqtive Thinking

Read all the latest details and in-depth thinking about the Reaqtor, Reaqtive & Nuqleon frameworks from the project maintainers.

Reaqtor blog
Reaqtive Thinking
How Reaqtor combines reactivity with reliable data processing

How Reaqtor combines reactivity with reliable data processing

Carmel Eve

One of the big features that distinguishes Reaqtor from classic Rx is the ability to run long running stateful queries. It does this through the persistence of state which allows these queries to survive restarts, outages and even moving between different machines. It is the ability to execute these incredibly long running queries that enables support for services like Bing, Cortana and M365.
Reaqtor's Open Source Journey

Reaqtor's Open Source Journey

Howard van Rooijen

Reaqtor is almost 10 years old. The journey to make it available as open source has taken over 5 years. Read how endjin spearheaded the process and became the project maintainers.
Sequences, LINQ, Rx, & Reaqtor Part 6: Reaqtor

Sequences, LINQ, Rx, & Reaqtor Part 6: Reaqtor

Ian Griffiths

In the final part in this series, we finally get to explore Reaqtor and understand how evolves the concepts of Rx for a cloud native world.
Sequences, LINQ, Rx, & Reaqtor Part 5: Remotable Expressions

Sequences, LINQ, Rx, & Reaqtor Part 5: Remotable Expressions

Ian Griffiths

In the fifth part in this series we explore the ability to serialize expression trees and then remote them.
Sequences, LINQ, Rx, & Reaqtor Part 4: Reaqtive

Sequences, LINQ, Rx, & Reaqtor Part 4: Reaqtive

Ian Griffiths

In the fourth part in this series we explore the Reaqtiveframework including IReactiveObservable<T> and IReactiveQbservable<T>.
Sequences, LINQ, Rx, & Reaqtor Part 3: Rx

Sequences, LINQ, Rx, & Reaqtor Part 3: Rx

Ian Griffiths

In the third part in this series we investigate IObservable<T> and Rx.

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