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It started as a proprietary database. Apple acquired it and then open sourced it eventually.

• tapirl 5y ago
  Didn't it start as an open source database? then apple acquired it and made it close sourced, then open sourced it again after several years. It is weird that this DB has a good reputation which doesn't match its popularity.
  • jitl 5y ago
    FoundationDB was the first publicly available distributed transactional KV on the market that I can recall. It wasn’t “open” though - always proprietary. They generated a lot of hype and good press for being this NoSQL DB that was all about ACID correctness in the age of “mongo is webscale (by writing to /dev/null)”. They had a demo showing impressive throughout on a low power cluster with no data loss during a power cycle. I think that despite generally impressive tech they had some trouble selling but did end up selling the company to Apple.
  • astrange 5y ago
    The source was licensed to some people but it wasn’t open source IIRC.
  • jen20 5y ago
    No, it was not open source prior to Apple releasing it as Apache 2.0 in April of 2018.