UserGems is an AI command center for outbound and account-based marketing (ABM). The platform helps go-to-market teams identify high-intent buyers, prioritize leads, and execute personalized outbound and ABM campaigns, including by tracking when champions change jobs. Founded by brothers Christian and Stephan Kletzl and part of Y Combinator's Summer 2014 batch, UserGems raised a $2.4M seed and a $20M Series A led by Craft Ventures.