Core Concepts
Learn how to use BuiltOnRails to discover, organize, and share your Rails stack.
Stack Scanner
Detect stacks from any GitHub repo
Paste any GitHub repo URL and instantly see what technologies it uses. The scanner reads Gemfile, package.json, and importmap.rb to identify stacks.
How to use:
- Go to Stack Scanner
- Paste a repo URL or select from your repos
- View matched stacks and create a collection
Collections
Organize and export your stacks
Create collections of your favorite stacks. Use them to document your projects, share with your team, or export as context for AI coding assistants.
Collection features:
- • Create - Build your own curated stack lists
- • Scan & Add - Detect stacks from repos and add them
- • Export - Download as Markdown or Gemfile snippets
- • Share - Public collections are discoverable by others
LLM-Ready Exports
Export your collection as context for Claude, ChatGPT, or Cursor. Includes stack names, categories, and your custom notes.
Products
Apps and tools built with Rails
Discover SaaS apps, marketplaces, gems, courses, and tools built with Ruby on Rails. See what stacks they use and get inspired for your own projects.
Stacks
Gems, libraries, and services
Browse 113+ technologies used in Rails applications. From authentication gems to deployment tools - find the right stack for your needs.