Auth0 vs Passport: What are the differences?
Auth0: Token-based Single Sign On for your Apps and APIs with social, databases and enterprise identities. A set of unified APIs and tools that instantly enables Single Sign On and user management to all your applications; Passport: Simple, unobtrusive authentication for Node.js. It is authentication middleware for Node.js. Extremely flexible and modular, It can be unobtrusively dropped in to any Express-based web application. A comprehensive set of strategies support authentication using a username and password, Facebook, Twitter, and more.
Auth0 and Passport can be primarily classified as "User Management and Authentication" tools.
Passport is an open source tool with 15.9K GitHub stars and 936 GitHub forks. Here's a link to Passport's open source repository on GitHub.
Binary.com, Chattermill, and White Rabbit Express are some of the popular companies that use Auth0, whereas Passport is used by Decision6, University of Europe Laureate Digital, and KOACHR. Auth0 has a broader approval, being mentioned in 121 company stacks & 55 developers stacks; compared to Passport, which is listed in 11 company stacks and 11 developer stacks.