I have been working on a new product which competes with NiFi, providing streaming data transformations.

Think, if order value > 100 and the customer has ordered 3 times in the last hour and the product will be in stock tomorrow.

Kafka streams, Flink and Dataflow are super powerful and I think there is room for a GUI tool.

Would be great to hear experiences of NiFi in this domain or discuss the space with any experienced users. Will add contact details in my profile.