Suggest an alternative to

Doorkeeper

Doorkeeper is an OAuth 2 provider for Ruby on Rails / Grape.

Why do you think that https://github.com/oauth-xx/oauth2 is a good alternative to Doorkeeper

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with Doorkeeper. Optional.

A valid email to send you a verification link when necessary or log in.