Yes. Apache Airflow is a very large open source community and is very actively supported and updated. Find more details here and here.
We have worked in open source systems, both using as well as contributing, for most of our collective careers. We see open source products, when they are actively supported by the community, are longer lasting systems which reduce technology turn over and often are lower costs.
Our current servers are at Release version 3.0.6. Here is a link to the Github repo for the Airflow project.