Tricount is a mobile app and web service that helps users split bills and expenses with groups. It has over 550,000 downloads and estimates 850,000 total users. Key features include easily creating expense groups, adding and reviewing expenses, and sharing balances. The presentation highlights strong growth over the past few years and discusses partnerships with payment apps like Lydia to further improve the user experience and drive more transactions per day and money processed. It aims to play a bigger role in the sharing economy through better reimbursement functionality.