PE-backed SmartBear, a provider of software development and quality tools, agreed to acquire Bugsnag, a provider of web and application services. SmartBear is backed by Vista and Francisco Partners. Financial terms were not disclosed. "SmartBear solutions cover the critical areas of design, development, test management and automation, and Bugsnag adds app stability in production environments to our full span of SDLC coverage. This addition amplifies our rapid growth we’ve seen over the past few years and solidifies the position of SmartBear as the first choice for millions of developers and software teams around the globe," Frank Roe, SmartBear CEO.