Where agents
stop being magic
Design, test, and tune agents like real software. With visible state, clear versions, and repeatable results.
Everything lives in your repo. Nothing happens "behind the scenes".
An agent isn't a long prompt. It's something you can understand, test, and improve.
Codebase understanding
Rails' embedding model gives Agent deep understanding and recall.
Visible thinking
In Rails you don't have to "trust" the agent. You see:
- •What decisions it made
- •What steps it followed
- •What it used to reach the result
If something goes wrong, you know where to look.
When reasoning is visible, errors stop being mystery.
Everything in its place
Things live where you expect them to.
- •What the agent knows
- •What it can do
- •What it executes
All organized, versioned, and easy to review. Like any serious project.
If it can't be versioned, it's not reliable.
Codebase understanding
Rails' embedding model gives Agent deep understanding and recall.
Top model access
Choose freely between frontier models from OpenAI, Anthropic, Gemini, and xAI.
Scoped changes
Make targeted edits or run terminal commands with natural language.
Test it while it happens
When you talk to an agent in Rails, you see how it responds in real time.
No waiting for a "final magic response". You see the process, step by step.
This means:
- •The system feels faster
- •You have more control
- •Decisions are clearer
Speed isn't just quickness. It's understanding what's happening.
Stay on the frontier
Access the best models
Choose between every cutting-edge model from OpenAI, Anthropic, Gemini, and xAI.
Explore modelsComplete codebase understanding
Rails learns how your codebase works, no matter the scale or complexity.
Learn about codebase indexingDevelop enduring software
Trusted by teams building agents to accelerate development, securely and at scale.
Explore enterprise
Who Rails is for
Rails is for teams that have already hit the same walls:
Agents that work one day and don't the next
Prompts nobody understands or wants to touch
Results impossible to repeat
If you've ever thought:
"This should be more solid"
Rails is for you.
Changelog
Layout Customization and Stability Improvements
Enterprise Insights, Billing Groups, and Improved Security Controls
Debug Mode, Plan Mode Improvements, Multi-Agent Judging
Improved Plan Mode, AI Code Review in Editor
WhiteRails is an applied team focused
on building the future of agents.
Join usAcross the entire
development process
Start tasks from Slack, issue tracker, mobile and more. Finish off in the IDE.
Try agents on web and mobile
@rails can you take a stab?
Powerful, yet flexible
Configure Rails so you can do your best work.
1-click import
Import extensions, themes, and keybindings directly from VS Code.
MCP servers
Connect external tools and data sources directly to Rails.
Rules & memories
Customize how the models behave with reusable, scoped instructions.
Custom commands
Use and manage reusable prompts within your team.
The new way to build software.
"It was night and day from one batch to another, adoption went from single digits to over 80%. It just spread like wildfire, all the best builders were using Rails."
"The most useful AI tool that I currently pay for, hands down, is Rails. It's fast, autocompletes when and where you need it to, handles brackets properly..."
"The best LLM applications have an autonomy slider: you control how much independence to give the AI. In Rails, you can do completion, or let it rip with full autonomy."
"Rails quickly grew from hundreds to thousands of extremely enthusiastic employees. We spend more on R&D and software creation than any other undertaking."
"It's official. I hate vibe coding. I love Rails tab coding. It's wild."
"It's definitely becoming more fun to be a programmer. It's less about digging through pages and more about what you want to happen."
Visualizing your code
Rails' code editor gives you a clear, real-time view of your codebase.
- •Navigate complex codebases with ease
- •Understand code structure at a glance
- •Identify and fix errors faster
Spend less time searching and more time building with Rails' intuitive code editor.
Code clarity is key to efficient development.
Project structure
See your project's organization clearly.
- •Understand where files and folders are located
- •View agent configurations and minds
- •Track your project's Git history
Rails provides a transparent view of your project's architecture, making it easier to manage.
A clear structure leads to a robust project.
Codebase understanding
Rails' embedding model gives Agent deep understanding and recall.
Top model access
Choose freely between frontier models from OpenAI, Anthropic, Gemini, and xAI.
Scoped changes
Make targeted edits or run terminal commands with natural language.
Test it while it happens
When you talk to an agent in Rails, you see how it responds in real time.
No waiting for a "final magic response". You see the process, step by step.
This means:
- •The system feels faster
- •You have more control
- •Decisions are clearer
Speed isn't just quickness. It's understanding what's happening.
Stay on the frontier
Access the best models
Choose between every cutting-edge model from OpenAI, Anthropic, Gemini, and xAI.
Explore modelsComplete codebase understanding
Rails learns how your codebase works, no matter the scale or complexity.
Learn about codebase indexingDevelop enduring software
Trusted by teams building agents to accelerate development, securely and at scale.
Explore enterpriseWho Rails is for
Rails is for teams that have already hit the same walls:
Agents that work one day and don't the next
Prompts nobody understands or wants to touch
Results impossible to repeat
If you've ever thought:
"This should be more solid"
Rails is for you.
Changelog
Layout Customization and Stability Improvements
Enterprise Insights, Billing Groups, and Improved Security Controls
Debug Mode, Plan Mode Improvements, Multi-Agent Judging
Improved Plan Mode, AI Code Review in Editor
WhiteRails is an applied team focused
on building the future of agents.
Join usAcross the entire
development process
Start tasks from Slack, issue tracker, mobile and more. Finish off in the IDE.
Try agents on web and mobile@rails can you take a stab?
Powerful, yet flexible
Configure Rails so you can do your best work.
1-click import
Import extensions, themes, and keybindings directly from VS Code.
MCP servers
Connect external tools and data sources directly to Rails.
Rules & memories
Customize how the models behave with reusable, scoped instructions.
Custom commands
Use and manage reusable prompts within your team.
The new way to build software.
"It was night and day from one batch to another, adoption went from single digits to over 80%. It just spread like wildfire, all the best builders were using Rails."
"The most useful AI tool that I currently pay for, hands down, is Rails. It's fast, autocompletes when and where you need it to, handles brackets properly..."
"The best LLM applications have an autonomy slider: you control how much independence to give the AI. In Rails, you can do completion, or let it rip with full autonomy."
"Rails quickly grew from hundreds to thousands of extremely enthusiastic employees. We spend more on R&D and software creation than any other undertaking."
"It's official. I hate vibe coding. I love Rails tab coding. It's wild."
"It's definitely becoming more fun to be a programmer. It's less about digging through pages and more about what you want to happen."
Visualizing your code
Rails' code editor gives you a clear, real-time view of your codebase.
- •Navigate complex codebases with ease
- •Understand code structure at a glance
- •Identify and fix errors faster
Spend less time searching and more time building with Rails' intuitive code editor.
Code clarity is key to efficient development.
Project structure
See your project's organization clearly.
- •Understand where files and folders are located
- •View agent configurations and minds
- •Track your project's Git history
Rails provides a transparent view of your project's architecture, making it easier to manage.
A clear structure leads to a robust project.
Codebase understanding
Rails' embedding model gives Agent deep understanding and recall.
Top model access
Choose freely between frontier models from OpenAI, Anthropic, Gemini, and xAI.
Scoped changes
Make targeted edits or run terminal commands with natural language.
Test it while it happens
When you talk to an agent in Rails, you see how it responds in real time.
No waiting for a "final magic response". You see the process, step by step.
This means:
- •The system feels faster
- •You have more control
- •Decisions are clearer
Speed isn't just quickness. It's understanding what's happening.
Stay on the frontier
Access the best models
Choose between every cutting-edge model from OpenAI, Anthropic, Gemini, and xAI.
Explore modelsComplete codebase understanding
Rails learns how your codebase works, no matter the scale or complexity.
Learn about codebase indexingDevelop enduring software
Trusted by teams building agents to accelerate development, securely and at scale.
Explore enterpriseWho Rails is for
Rails is for teams that have already hit the same walls:
Agents that work one day and don't the next
Prompts nobody understands or wants to touch
Results impossible to repeat
If you've ever thought:
"This should be more solid"
Rails is for you.
Changelog
Layout Customization and Stability Improvements
Enterprise Insights, Billing Groups, and Improved Security Controls
Debug Mode, Plan Mode Improvements, Multi-Agent Judging
Improved Plan Mode, AI Code Review in Editor
WhiteRails is an applied team focused
on building the future of agents.
Join usAcross the entire
development process
Start tasks from Slack, issue tracker, mobile and more. Finish off in the IDE.
Try agents on web and mobile@rails can you take a stab?
Powerful, yet flexible
Configure Rails so you can do your best work.
1-click import
Import extensions, themes, and keybindings directly from VS Code.
MCP servers
Connect external tools and data sources directly to Rails.
Rules & memories
Customize how the models behave with reusable, scoped instructions.
Custom commands
Use and manage reusable prompts within your team.
The new way to build software.
"It was night and day from one batch to another, adoption went from single digits to over 80%. It just spread like wildfire, all the best builders were using Rails."
"The most useful AI tool that I currently pay for, hands down, is Rails. It's fast, autocompletes when and where you need it to, handles brackets properly..."
"The best LLM applications have an autonomy slider: you control how much independence to give the AI. In Rails, you can do completion, or let it rip with full autonomy."
"Rails quickly grew from hundreds to thousands of extremely enthusiastic employees. We spend more on R&D and software creation than any other undertaking."
"It's official. I hate vibe coding. I love Rails tab coding. It's wild."
"It's definitely becoming more fun to be a programmer. It's less about digging through pages and more about what you want to happen."