Shares of cloud-based software firm Five9 rise about 18 percent in debut

(Reuters) - Shares of Five9 Inc, a cloud-based software provider for call centers, rose about 18 percent in its market debut, valuing the company at about $380 million. Five9, which competes with Cisco Systems Inc and Avaya Inc, raised as much as $70 million after its initial public offering of 10 million shares was priced at $7 per share, much below its expected price range of $9-$11. Five9's shares opened at $7.95 and touched a high of $8.25. J.P. Morgan, Barclays and BofA Merrill Lynch were the lead underwriters to the offering. (Reporting by Avik Das in Bangalore)