thoughtbot/factory_bot
A library for setting up Ruby objects as test data.
Star History
Momentum
+204
STARS · LAST 30 DAYS
7
PER DAY
#19
MOST-STARRED Ruby
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +49 | +204 | +630 |
| Per day | 7 | 7 | 7 |
| Forks gained | +13 | +51 | +128 |
factory_bot gained 204 stars in the last 30 days, about 7 a day, and now has 8.2K. It is about 18 years old and has averaged roughly 454 stars a year. It ranks #19 among Ruby repositories and #791 across all languages on GitHubRepo.
Trending Record
5
DAYS ON TRENDING
#643
BEST RANK
Sep 24, 2026
FIRST APPEARANCE
Active
STATUS TODAY
factory_bot has maintained a continuous presence across global trending indexes, peaking at #643. Below is the 30-day activity profile:
💡 Overview
factory_bot is an open-source project written in Ruby: A library for setting up Ruby objects as test data.
Engineered for speed, consistency, and developer ease, it solves common hurdles in factories, factory-bot, factory-girl. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in Ruby for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/thoughtbot/factory_bot.git
cd factory_bot⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
Ruby >= 3.1 with Bundler
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
factory_bot coordinates its core functionality through a modular Ruby pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Autonomous AI Agents
Orchestrate intelligent workflows and tool-calling routines with factory_bot.
Model Inference & Prompting
Integrate fast, local or cloud-hosted generative AI models directly into production code.
Context Memory & RAG
Augment language models with dynamic vector retrieval and structured project memory.
Developer Productivity
Automate repetitive engineering tasks, code generation, and test creation using AI agents.
🚀 Getting Started
Install factory_bot using your package manager: `git clone https://github.com/thoughtbot/factory_bot.git`
Initialize your project workspace or configuration file for factory_bot.
Import factory_bot into your codebase or invoke it directly from your terminal.
Execute your test suite or run `factory_bot --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Ruby, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
thoughtbot/factory_bot is currently ranked #791 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #786 | shaka-project/shaka-player | JavaScript | ★ 8.2K | Compare ↗ |
| #787 | azahar-emu/azahar | C++ | ★ 8.2K | Compare ↗ |
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| #789 | OrchardCMS/OrchardCore | C# | ★ 8.2K | Compare ↗ |
| #790 | AntennaPod/AntennaPod | Java | ★ 8.2K | Compare ↗ |
| #791 | thoughtbot/factory_bot This Project | Ruby | ★ 8.2K | |
| #792 | inertiajs/inertia | TypeScript | ★ 8.1K | Compare ↗ |
| #793 | iyear/tdl | Go | ★ 8.1K | Compare ↗ |
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Frequently Asked Questions
What does factory_bot do? +
A library for setting up Ruby objects as test data.
What language is factory_bot written in? +
The primary language is Ruby. Topics include: factories, factory-bot, factory-girl, fixtures, rails.
Is factory_bot actively maintained? +
Yes, the last recorded push was on Aug 21, 2026 with 83 open issues being tracked.
How many stars does factory_bot have? +
factory_bot has 8,170 stars and 2,554 forks on GitHub.
How does factory_bot rank among GitHub repositories? +
With 8,170 stars, thoughtbot/factory_bot is ranked #791 globally across all repositories tracked on GitHubRepo and #19 among Ruby projects.
What license is factory_bot distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
