Cofounder, Chairman and CEO\nWebEx Communications Inc.When Subrah Iyar pursues a customer, it\u2019s not as a salesman but as a suitor. He is energetic, sincere and charming?and he doesn\u2019t quit. "There is a leap of faith that early customers have to take," says Vivek Randive, whose Palo Alto, Calif., company, Tibco, was one of the first to use the Web conferencing services offered by Iyar\u2019s San Jose, Calif.-based startup, WebEx Communications. No one can predict whether such a relationship will work out. "We were buying into Subrah, his ability to lead, to manage," says Randive, who is also a WebEx board member. WebEx CEO Iyar and CTO Min Zhu founded the company in 1996 with some software Zhu had invented but couldn\u2019t sell. They noodled for three years then scored with a set of inexpensive, subscription-based services that let users create online meeting rooms in which they can share documents and software applications with anyone who has a Web browser. Last year the company captured 58 percent of the Web conferencing services market, according to market researcher Frost & Sullivan.Iyar, 45, has grand goals?to see his product used by "every consumer," says the Mumbai native, who came to the United States in 1982 for its entrepreneurial opportunities.Being the head of an online conferencing company doesn\u2019t keep Iyar off the road. He travels eight to 12 weeks a year to meet customers. "Our kind of service doesn\u2019t eliminate the need for face-to-face, because relationships are built face-to-face," he says. But without WebEx technology, he would travel a lot more?and spend even less time with his wife and two young daughters. As it is, he says, "if you ask my wife, I\u2019m mentally absent though physically present."Like many entrepreneurs, Iyar admits to being obsessed with his work but covets time to recharge. "I love to withdraw into solitude. If I go a week without getting that, I get totally frazzled," he says.