Citus makes proprietary modules for it, and likely employs some postgres devs. I wouldn't consider postgres "open core" by any means. I would consider Citus "a proprietary extension".
If the majority of the development of an open source product comes from proprietary extensions then it's open core. That's the project's particular monetization model.
In this case, it seems like that is the monetization model for Redis (and plenty of other open source projects). It's not the case, as far as I know, for Postgres.
> Would you consider postgres "open core" as well?
Its not entirely bizarre to say that, though it's farther from undisputable open core than Redis is, as there isn't a single proprietary vendor with as significant a relationship to the open source project as is the case with RedisLabs.
> Citus makes proprietary modules for it, and likely employs some postgres devs.
And EntrepriseDB. And a number of other proprietary downstream vendors that sponsor significant Postgres development. If PG is open core, it's radically decentralized open core.
Citus makes proprietary modules for it, and likely employs some postgres devs. I wouldn't consider postgres "open core" by any means. I would consider Citus "a proprietary extension".