This document summarizes case studies of two companies, Intuit and T-Mobile, deploying passwordless authentication using Nok Nok's FIDO solution. Intuit wanted to improve security while providing a seamless customer experience on mobile and web. Their implementation of Nok Nok's FIDO reduced authentication failures from 20-15% to under 1% and cut authentication time by 20%. T-Mobile aimed to reduce password pains and increase confidence in the right user accessing accounts. Their rollout of Nok Nok's FIDO cut password resets by 65% and saw 50% adoption in the first 5 months. Both companies were able to successfully deploy modern, standards-based passwordless authentication improving the customer experience