Passport vs SimpleSAMLphp: What are the differences?
What is 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.
What is SimpleSAMLphp? Application written in native PHP that deals with authentication. It is an award-winning application written in native PHP that deals with authentication. It supports some other identity protocols and frameworks, such as Shibboleth 1.3, A-Select, CAS, OpenID, WS-Federation or OAuth, and is easily extendable, so you can develop your own modules if you like.
Passport and SimpleSAMLphp can be categorized as "User Management and Authentication" tools.
Passport and SimpleSAMLphp are both open source tools. It seems that Passport with 16.3K GitHub stars and 972 forks on GitHub has more adoption than SimpleSAMLphp with 687 GitHub stars and 486 GitHub forks.