The code of Baserow has been released publicly under the MIT license. It has always been the plan for Baserow to be commercial open source software. After writing lots of documentation the past few weeks, the code has finally been made public.
Official repository: https://gitlab.com/bramw/baserow
Release blog post: https://baserow.io/blog/open-source-release-of-baserow
Developer documentation: https://baserow.io/docs/index
API documentation: https://api.baserow.io/api/redoc/
Baserow is an open source online database tool and Airtable competitor. The software is still in an early alpha phase, but everyone can try it out now. You can use docker-compose to quickly spin up a demo or you can try the SaaS version at https://baserow.io.