What are some alternatives?
When comparing ProActive Workflows & Scheduling and Luigi, you can also consider the following products
Metaflow - Framework for real-life data science; build, improve, and operate end-to-end workflows.
StackStorm - StackStorm is a powerful open-source automation platform that wires together all of your apps...
Pipedream - Integration platform for developers
Azkaban - Azkaban is a batch workflow job scheduler created at LinkedIn to run Hadoop jobs.
RunDeck - RunDeck is an open source automation service with a web console, command line tools and a WebAPI.
Apache Oozie - Apache Oozie Workflow Scheduler for Hadoop