Jeff Pulver is the co-founder in Vonage (NYSE: VG), one of the biggest and earliest VoIP companies around, and Zula, a WhatsApp for businesses. Pulver is a self-described futurist, serial entrepreneur and long-time evangelist for VoIP technologies. He is an early investor into Twitter, Foursquare, and Facebook. He is also the producer of the 140 Characters Conference.