Cornerstone Technologies, a Subsidiary of Sonasoft, Partners with Exterro to Extend its E-Discovery Services Into Enterprise Market SAN JOSE, CA, Nov. 01, 2018 (GLOBE NEWSWIRE) -- via NEWMEDIAWIRE – Sonasoft Corp. (OTCQB: SSFT),  a leader in e-discovery, data archiving, and data migration solutions, announces that through its...