Tagkast | 1,364 followers on LinkedIn. Tagkast is a social marketing platform that maximizes the reach of sponsored events using branded photos. Our patented, proprietary tablet software leads the event technology industry with unmatched rates of crowd participation, social sharing, and digital engagement. Up to 95 percent of guests at events engage with the Tagkast platform, and, on average, 65 percent will share branded content to their own personal social networks directly from the event.