Advent International led the $70m Series C funding round in Salt Security, the API security company. The round had participation from Alkeon Capital and DFJ Growth. Existing investors Sequoia Capital, Tenaya Capital, S Capital VC, and Y Combinator also participated in the round. "The rapid proliferation of APIs has dramatically altered the attack surface of applications, creating a major challenge for large enterprises since existing security mechanisms cannot protect against this new threat. We continue to see API security incidents make the news headlines and cause significant reputational risk for companies. As we investigated the API security market, Salt stood out for its multi-year technical lead, significant customer traction and references, and talented team," Bryan Taylor, Advent's technology team Managing Partner and Head in Palo Alto.