[skmurphy]

If you are pre-funded neither PWC nor EY, who do most of the tech accounting in Silicon Valley, will want to engage. There are a number of part-time, interim, and "rent a CFO" firms who are more appropriate for early stage startups.

Very early on you are better off selecting a small firm to help you with the basics of bookkeeping and taxes until you either raise a real A round (e.g. $4M or more) or have significant revenue. Ask your attorney for a "due diligence" checklist: both funding and acquisition teams tend to look for the same documents and disclosures. The more you can keep all of that straight and documented from the beginning (e.g. purchase agreements, license agreements, major supplier contracts, ...) the easier it is later on.