Pete Koomen

Pete Koomen co-founded Optimizely during Y Combinator's Winter 2010 batch, building it from a pivoted idea in week two of YC into a $100M+ ARR experimentation platform before its 2020 acquisition. A former Google product manager who helped launch Google App Engine, Pete brought engineering rigor and scientific method obsession to the messy world of product decisions. He co-authored the field-defining book 'A/B Testing: The Most Powerful Way to Turn Clicks Into Customers,' and now serves as a Group Partner at Y Combinator, where he advises early-stage founders on enterprise sales, AI product design, and the art of building companies that actually figure out what works.