All the features are open source. Here is how to build from source https://docs.yugabyte.com/latest/contribute/core-database/bu....
> What do I mean by Fake Open Source? A project that has a large percentage of its contributors beholden to a single organization/entity to me is not really open source in spirit.
Well, somebody gotta start the project, no? Feel free to contribute though. Since it reuses PostgreSQL, it directly inherits the "postgresql community commits". The same with being a fork of Apache Kudu fork.
> If there's an "Enterprise" product and the organization calls the source code for the main project the "Community Edition" or something like it, it's not Real Open Source.
The "Enterprise" edition is "just" some scripts that make deployment & monitoring easier (and includes 24/7 developer support). All c++ features are open source.
And it's still young. You can't compare against PostgreSQL that has 20+ years of being available.