Google around and pick the most popular one usually works, as least if you're using a more "trendy" framework. For Rails, Devise seems to be the way to go, as

Google around and pick the most popular one usually works, as least if you're using a more "trendy" framework. For Rails, Devise seems to be the way to go, as it's the most popular by far[0]. It's what I'm using for my project. [0]https://www.ruby-toolbox.com/categories/rails_authentication https://www.ruby-toolbox.com/categories/rails_authentication