The 'Fintech 100' report for 2015 showcases the top fintech innovators from 19 countries, highlighting companies that effectively leverage technology to disrupt and enhance the financial services sector. The report includes a diverse range of firms categorized into payments, lending, wealth, and insurance, with significant growth in global fintech financing reaching $20 billion, a 66% increase from 2014. The top ten companies include Zhongan, Oscar, and Wealthfront, selected based on criteria like capital raised and innovation potential.