John Macllwaine (CEO) and Kin Kee (co-founder and CTO) of Highnote.Provided by Highnote Highnote, a San Francisco-based payments startup, has raised $90 million in Series B funding that values it at more than $750 million, a source close to the transaction told Forbes. The round was led by Chicago-based investment firm Adams Street Partners, with Oak HC/FT, Costanoa, Westcap, and Pinegrove Capital Partners also investing. Founded in 2020, Highnote’s first product was card-issuing software that l...