Maybe not entire.

Google Ads: built from great many pieces, one of the largest was DoubleClick, acquired in 2008. Google Docs: acquired in 2006 from Writely. Google Sheets: acquired in 2006 from XL2Web. Google Maps: acquired in 2004.

I'm not trying to say that Google acquired everything and hasn't built anything; not at all. But a few crown jewels were indeed acquisitions.

That's true of most large companies.

Microsoft acquired Powerpoint.

Meta acquired Instagram.

Apple acquired NeXT and Siri.

Under a certain angle, Apple has become NeXT, dropping MacOS Classic, and co-opting CEO from NeXT (who happened to be Steve Jobs).

While I agree with your larger point - I think GSuite was built around an acquisition (Writely) - or that may have been just Google docs.