Bullet Train
Ruby on Rails
ruby
Open source + paid
—
Bullet Train is an MIT-licensed Ruby on Rails framework designed to accelerate SaaS development by providing production-ready features common to most applications. Built on modern Rails tooling with Tailwind CSS for styling, it includes authentication, team management, role-based permissions, a REST API, and a sophisticated scaffolding system called Super Scaffolding. The platform serves entrepreneurs and developers who want to focus on what makes their app unique rather than rebuilding standard infrastructure.
Key Features
- Open source Rails SaaS framework
- Strong scaffolding/story for CRUD and teams
- Tailwind theme + permissions patterns
Best For
- •Rails builders who want OSS baseline
- •products with lots of CRUD/admin
Considerations
- •Pro features may be required for billing features
- •more 'framework' than minimal starter
Quick Info
- Stack
- Ruby on Rails
- Language
- ruby
- Pricing
- Open source + paid
- Price
- —
- Last Verified
- Feb 4, 2026
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