Never said that, but a competent engineer should be able to build like 75% of the main functionality of Zendesk over a weekend.
Now, I understand there's probably a lot more to it which is why I would expect it to be a company of around 50 engineers and 150 business/marketing/etc and that's being generous.
The hill I'd die on is that, with money not being a scarce resource and a technically feasible challenge present, a team of 200 should be able to build and sustain almost anything in the world. And that's being even generous. I think realistically a team of 50 should be able to build almost anything
