Y Combinator does exclusively seed funding. Seed funding is the
earliest stage of venture funding.
It pays your expenses while you develop a prototype.
Some companies may need no more than seed funding.
Others will go through several rounds.
There is no right answer: how much funding you need depends on the
kind of company you start.
At Y Combinator, our goal is to get you through the first phase.
This usually means: get you to the point where you
have a convincing demo, so you can get more funding.
We also try to match you up with investors-- and in some cases even
acquirers.

Y Combinator: Funding