Tapad, a provider of unified cross-device advertising solutions, has closed a Series B round of funding for $6.5 million. Firsthand Technology Value Fund invested in the round. Founding investors FirstMark Capital and Avalon Ventures also participated.

Tapad investors include Metamorphic Ventures, Lerer Ventures, former DoubleClick CEO David Rosenblatt , AppNexus founder Brian O’Kelly, former Huffington Post CEO Eric Hippeau, 24/7 Real Media co-founder Geoff Judge and QUIGO founder and CEO Mike Yavonditte.