The tough sell for me is -- I don't see the source code. 10 whitepapers and 15 blog posts comparing to Google doesn't add to credibility. That works for investors and for fun recreational reading. Show me how you do write locking, let's see your cluster membership module.

Perhaps, they want to be Oracle or DB2, that's fine, and I understand that, different market perhaps. But they don't have the credibility those companies do. Even Google's F1 has more credibility because well, because of brand name recognition.

Look at these other DB products I might want to choose, all with available source code: RethinkDB, PostreSQL, Riak, CouchDB, SQLite, MariaDB, MongoDB, Couchbase, Cassandra.

At this point, databases are a bit like operating system, there is no way I am picking a closed source operating system if I have a choice. It is just too critical of a component to be closed under a sealed lid.

Yes they all have different features and maybe FoundationDB does something better, I will still put it last in whatever category, just because I want to be able to look at how it works.