Censys, which provides an attack surface management platform to high-profile companies like Google, has raised $15.5 million. : Censys, a cybersecurity startup that provides an attack surface management platform to high-profile companies like Google, has raised $15.5 million in a series A round of funding coled by Google’s GV and Decible, with participation from Greylock Partners. Ann Arbor-based Censys began as a research project at the University of Michigan in 2015 and was spun out as a standalone company in 2017.