a database of 1317 companies who went throught the Y Combinator accelerator program between 2005 and 2017 and a whole bunch of metrics about them
The most comprehensive and up-to-date public dataset on Y Combinator companies, with all batches from 2005 to 2018. Maintained by Snappr.
YCensus is basically a work in progress census of Y Combinator startup founders. It's also happens to be an IMDB of YC as well. (NOTE: This is not affiliated with Y Combinator.)