# Bullet Train

An MIT-licensed Rails SaaS framework with team management, billing, and API scaffolding built in

https://topboilerplates.com/bullet-train

Framework: Ruby on Rails | Pricing: Free | GitHub stars: 1886

## Verdict

Best for: Rails developers who want a mature, MIT-licensed SaaS framework with multi-tenant teams, billing, and API generation instead of assembling gems themselves.

Skip if: You're not building on Ruby on Rails, or you want a lighter-weight starter without Bullet Train's opinionated Super Scaffolding conventions.

## Description

Bullet Train is an open-source, MIT-licensed Rails framework for building SaaS products, built on Rails 8, Tailwind CSS, Devise, and CanCanCan. It includes its own "Super Scaffolding" code generator for production-ready views, team-based multi-tenancy with role-based access, a subscription billing engine, webhooks with a debugging UI, audit logs, and an auto-generated REST API with OpenAPI schemas. It's maintained by Bullet Train, Inc., co-founded by Andrew Culver.

## Pros and cons

+ Fully free and MIT-licensed with no paywalled tier

+ Mature project with a real company and community behind it, not a one-off template

+ Auto-generates a REST API with OpenAPI schema alongside the web UI

- Rails-only - no option for other backend stacks

- Super Scaffolding's generator-driven workflow has a learning curve of its own

- Payments/billing engine still requires a Stripe (or similar) account to configure

## Features

- auth-included
- rbac-roles
- teams-orgs
- multi-tenant
- payments-included
- subscriptions
- api-routes
- webhooks-outbound
- dark-mode
- open-source
- mit-licensed
- free-tier

## Stack

- Tailwind

## Links

- Website: https://topboilerplates.com/go/bullet-train
- GitHub: https://github.com/bullet-train-co/bullet_train

## Alternatives

- [IndieKit](https://topboilerplates.com/indiekit)
- [Carrot Seed](https://topboilerplates.com/carrot-seed)
- [ShipFast](https://topboilerplates.com/shipfast)