 He became interested in Internet telephony in 1995, when he was as a systems administrator at Cantor Fitzgerald.Pulver founded a company called Min-X.com in 1998 to offer Voice over IP (VOIP) services; he recruited Jeffrey A. Citron to join, who helped raise $12 million in funding, including $1 million of his own money, and took over as CEO.The company changed its name to Vonage in 2001.