Digital Account Opening Solution For Banks & Credit Unions MANTL Secures $40 Million Through Series B Investment Round  Crowdfund Insider. : MANTL, a U.S.-based digital account opening solution for banks and credit unions, announced on Tuesday it raised $40 million through its Series B funding round, which was led by Alphabet’s independent growth fund, CapitalG, with participation from D1 Capital Partners, BoxGroup and existing investors Point72 Ventures, Clocktower Technology Ventures, and OldSlip Group. The company previously raised $8 million through its Series A funding round, led by Point72 Ventures.