Cloud-based email security company AGARI, f.k.a. Authentication Metrics Inc., has added $2.5 million in fresh capital from Alloy Ventures, Battery Ventures, First Round Capital and Greylock Partners. The Series A round will be used to scale its technology, designed to protect brand reputation, eliminate email threats, and prevent the loss of sensitive data, the company says. AGARI is based in Palo Alto, Calif. Alloy Ventures led the round.