Mashable is reporting that Vocus, a developer of software for the public relations industry, will acquire Help a Reporter Out (HARO), the wildly popular service that connects journalists with sources.

HARO, which started out as a Facebook group, quickly surged to be a fantastic resource for both PR professionals and journalists. The service caught on quickly because it is free for both journalists and PR types, whereas the leader in the space, Profnet, is subscription based.