A visual tool to define and run real-time decision algorithms. Brings agility to business teams, liberates developers to focus on technology.

Real-time actions on data

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Nussknacker lets you design, deploy and monitor real time decision algorithms with easy to use GUI.

For stateless use cases we provide lightweight, but scalable and performant engine deploying to Kubernetes. When more advanced, stateful scenarios are needed we can leverage the power and reliability of Apache Flink to make your processes fast and accurate.


If you want to see Nussknacker in action without any other dependencies, you can use embedded engine in Request-response mode (scenario logic is exposed with REST API), just run:

docker run -it --network host -e DEFAULT_SCENARIO_TYPE=request-response-embedded touk/nussknacker:latest

Be aware that some things (e.g. metrics) will not work, and this engine is not intended for production use.

If you want to follow step-by-step via more complex tutorials, based on production ready engines, read one of quickstart guides for: Streaming mode on Flink engine or Streaming mode on Lite engine or Request-response mode on Lite engine


Talk to us on mailing list or start a discussion

Scala compatibility

Currently, we do support Scala 2.12, we will cross publish when Flink supports Scala >= 2.13.

Flink compatibility

We currently support only one Flink version (more or less the latest one, please see flinkV in build.sbt). However, it should be possible to run Nussknacker with older Flink version.

While we don't provide out-of-the-box support as it would complicate the build process, there is separate repo with detailed instructions how to run Nussknacker with some of the older versions.

Related projects


Nussknacker is an open source project - contribution is welcome. Read how to do it in Contributing guide. There you can also find out how to build and run development version of Nussknacker.


Nussknacker is published under Apache License 2.0.