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Nah, because there are definitely projects Google started on there. The one OP mentioned is on there, and I remember Google Zeitgeist from back when.
EDIT: Not saying that this is comprehensive, but only five entries reference being acquired from elsewhere in their description.
I didn’t mean that every single Google product is a acquisition, just a LOT of them.
https://en.m.wikipedia.org/wiki/List_of_mergers_and_acquisitions_by_Alphabet