Mashery, cloud-based multitenant API management provider, announced this week that it has secured $10 million in funding led by OpenView Venture Partners.  Other participating investors include existing investors Cisco, Formative Ventures, First Round Capital and .406 Ventures. Mashery has seen a lot of growth.  Year-over-year, traffic has increased by 272%, the number of live applications built on Mashery-powered APIs grew by 75%, and the Mashery network of active developers grew more than 30 percent in the past year. This month Mashery opened its fourth global office in Boston, Massachusetts. Mashery customers include: USA TODAY, Comcast, Hoover's, Klout, Associated Press, Rdio and Expedia.