Proofpoint, Inc. (NasdaqGM:PFPT) acquired NetCitadel, Inc. Posted on 05/20/2014 by Ron Klammer Posted in Mergers & Acquisitions Tagged Software Leave a comment Proofpoint, Inc. (NasdaqGM:PFPT) acquired NetCitadel, Inc., a company which develops a security orchestration platform that transforms static security devices into a software-defined security infrastructure.