After that, I co-founded travel search company ITA Software with Jeremy Wertheimer and Carl de Marcken; this company powers Kayak, Orbitz, and many airline websites. Google bought ITA Software in 2010 (closed Apr 2011) for ~$700M, and the system is now known as Google Flights.
Now I'm working on email protection: Inky uses new techniques to identify phishing scams and block them. Visit https://inky.com for details.