Litestream Ventures saw $78m in non-binding investor pledges during the World Economic Forum for companies helping to solve the world’s biggest challenges.

The firm also debuted its pledge-based signalling technology at its forum, delivered through a private app used by attending investors.

The closed-door Litestream forum brought together more than 120 investors, founders and funds, and a charitable partner — Star for Life. During the session, investors in the room signalled $78.1 million in non-binding pledges in support of 12 participating companies and the charitable initiative.