# bullet-train-co/bullet_train

The Open Source Ruby on Rails SaaS Template

Repository: https://github.com/bullet-train-co/bullet_train
Canonical: https://ross.abutalabs.com/products/bullet_train
Language: Ruby
License: MIT
License Family: permissive
Topics: rails, saas, bullet-train
Last push: 2026-08-16T06:17:01+00:00

## Health v2 (maintenance only)
Score: 93/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 83, longevity 100
- inputs: {"age_days": 1640, "days_push": 17, "days_rel": 119, "gap_med": 4.0, "n_releases_24m": 59}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1886, forks 303 (observed 2026-08-28T04:05:49.045965+00:00)

## What it is
Bullet Train is an open-source Ruby on Rails application template for building SaaS products. It provides a batteries-included starting point with authentication, teams, billing, and common SaaS scaffolding.

## Use cases
- build a saas product with rails
- rails starter template with authentication and billing
- kickstart a multi-tenant ruby on rails app
- bootstrap a subscription web application
- create a new rails app with teams and user management

## When to choose
- you are starting a new Ruby on Rails SaaS application from scratch
- you want prebuilt authentication, teams, and billing scaffolding
- you prefer convention-driven Rails development with a curated stack

## When to avoid
- you are maintaining an existing Rails app that cannot adopt the template structure
- you need a framework outside Ruby or Rails
- you want a minimal, unopinionated starting point

## Facets
- artifact type: framework
- maturity: active
- function: web-framework, auth, api-framework, developer-tools
- domain: web-development, backend, developer-tools
- platform: ruby, self-hosted
- tags: boilerplate, saas-template, rails-template, multi-tenancy, starter-kit, web-server, docker

## Member repositories
- bullet-train-co/bullet_train (main) score 93

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:49.045965+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:13:34.531751+00:00, confidence not recorded.
  - readme: https://github.com/bullet-train-co/bullet_train (fetched 2026-08-28T04:05:49.045965+00:00, sha 5a6b1dd8ca84)
- Data as of 2026-08-30T08:39:29.467469+00:00.