Quix Streams is an open-source Python library for processing real-time data on Apache Kafka, released under the Apache 2.0 licence. Developers use it to build event-driven applications and machine-learning or AI pipelines on Kafka streams through a streaming DataFrame API. The library runs on the user's own infrastructure. Quix Cloud is the company's managed offering for running such applications, and the project's GitHub page points to it as an option.
The project is maintained by Quix under the GitHub organisation quixio, and the publisher is Quix Analytics Ltd, a private limited company with its registered office in London. The UK is outside the EU, so the company falls under UK law. The library itself is Apache-licensed and can run inside a European organisation's own environment, and the data it processes stays where the user runs it. Organisations that use the managed Quix Cloud should check where it hosts data, as the vendor's public pages do not state this.