[xaranke]

I don't know if you can have a successful startup ecosystem without anchor BigCo companies that bring people to the area and eventually when these people leave they become VCs/founders/CTOs etc.

[robraven]

Pretty much every big name tech company has a presence in NYC, from FB to Google to Uber and smaller companies like Dropbox and Square.

[xaranke]

Right, but without an HQ there is no anchor.

[PretzelFisch]

I was under the impression that startup ecosystems develop around good universities that can supply them high quality graduates that are willing to risk low pay for a chance at winning the lotto.