Letter AI, an AI-powered sales and revenue enablement platform, experienced a significant boost in win rates by providing personalized training and collateral for sales and customer success teams. Initially, they struggled with an outsourced authentication provider, which consumed valuable time that could be better spent on their primary goal of empowering customers. Seeking a more efficient solution, the team at Letter AI decided against building an authentication system from scratch due to their need for rapid deployment as an early-stage startup. After evaluating various options and receiving recommendations from Y Combinator peers, they chose PropelAuth, which proved to be a seamless and responsive solution. This integration allowed Letter AI to concentrate on its core mission without the distraction of managing authentication issues, ultimately enhancing their operational efficiency and effectiveness.