Implicit in your comment is that a company without VC funding cannot grow as fast as a company with VC funding.
That was true ten years ago when a lot of costs were unavoidable: Server hardware ,server software, and you had to build a lot of software infrastructure from scratch.
Now all that is cheap, or free, and what isn't comes with lease terms.
Thus, lacking a big pile of money is not an inhibitor to growing big fast.