Last updated November 18, 2025 Ruby on Rails is a popular web framework written in Ruby. This guide covers using Rails 8 on Heroku. For information on running previous versions of Rails on Heroku, see the tutorial for Rails 7.x or Rails 6.x. The tutorial assumes that you have: Basic familiarity with Ruby, Ruby on Rails, and Git A locally installed version of Ruby 3.2.0+, Rubygems, Bundler, and Rai