Plaid Link is a drop-in module that handles credential validation, multi-factor authentication, and error handling for integrating financial institutions with apps. Initially launched in 2015, it has become an account linkage system trusted by millions of people. To improve its flexibility and consistency, Plaid has rebuilt the design system from scratch, creating a unified experience across desktop and mobile devices. The new version includes customization options to better tailor the Link experience to individual applications and users, as well as deeper user insights through real-time information via the onEvent callback. This update aims to make it easier for developers to build innovative solutions while delivering a more secure, convenient, and beautiful user experience.