PSG-backed Hornetsecurity, an email cloud security provider, completed the acquisition of Altaro, a global provider of backup solutions. Financial terms were not disclosed. "We have found exactly the right strategic buyer in Hornetsecurity and are delighted to become part of the group. The synergies between the two companies are obvious. Through our combined know-how and experience, and the innovative combination of our product suites, Hornetsecurity's European market leadership in cloud security has reached a new level," David Vella, Altaro CEO.