Techstars publishes a fair amount of data too: http://www.techstars.com/companies/stats/ http://www.techstars.com/companies/stats/ Then there's general studie

Techstars publishes a fair amount of data too: http://www.techstars.com/companies/stats/ http://www.techstars.com/companies/stats/ Then there's general studies of VC-backed companies. Not much available on pre-VC companies though.