Sabeer Bhatia is a pioneer in the field of web-based email, having co-founded Hotmail Corp. — which today boasts more than 220 million registered users — in 1996. After Microsoft acquired the company in 1998, Bhatia moved on to new projects, including Arzoo.com, an online travel services company for Indian consumers, InstaColl, which offers web-based office tools, and SabseBolo, an audio-conferencing platform for developing markets. Along the way, Bhatia has learned some critical lessons about starting businesses and keeping them going, even during difficult economic times. At the 2009 Wharton India Economic Forum, Achal Mehra, editor of Little India, interviewed Bhatia for India Knowledge@Wharton.