Sachin Kamdar, co-founder of parse.ly, a personalized recommendation service based in Philadelphia. NetFlix, Pandora, and many many other sites make personalized recommendations based on prior purchases or registered interests, user-inputted content, or comparisons with the purchase histories of other users. Parse.ly licenses a recommendation engine to publishers so they can introduce recommendations on their own sites through widgets and API access to their technology. The engine adds recommendations to the website based on user preferences and also offers extended options such as email newsletters.