Rails: your secret weapon for vibe coding
RailsFast is built on Ruby on Rails, and that's not by chance. Rails is the best framework for AI-assisted coding, and the best in the world agree.
Why Rails is perfect for AI coding
Ruby on Rails will be your unfair advantage in the age of AI-assisted coding. Here's why:
AI knows Rails better
Rails launched in the early 00s, so there are 20+ years worth of Rails code and content online that LLMs have been thoroughly trained on. No JS framework has been around for as long as Rails has.
Rails code is stable over time
Rails codebases look pretty much the same today as 20 years ago. This is not only good for us humans, but especially for AI: Rails training data is very stable, so AIs learned Rails better than other frameworks.
Rails conventions help AI thrive
Rails (unlike JS frameworks) has very strong conventions on how things are done. AI gets Rails very intuitively, because everything is mostly always the same across all projects, whereas JS projects are all different.
Rails is 10x less verbose
Rails code is 10x less verbose than JS code. This means if you're vibe coding your app, you'll use 10x less tokens to generate the same result, and context windows will take 10x longer to get filled. You'll move 10x faster, pay 10x less in API credits, and the AI is less likely to hallucinate because it can see the whole project at once.
Rails is the one-man framework
Rails was designed so an entire codebase could fit in one single engineer's head. In the age of AI, this means LLMs have it much easier with Rails to understand an entire project at a glance. This allows a single founder to build unicorn-scale software with just AI, without hiring a team.
Rails is better for SEO
No matter what they say, JavaScript sites don't rank as well. Search engines impose crawling budgets for JS websites, which is not the case for frameworks that serve plain, easily parseable, ready-to-consume HTML, like Rails. Rails makes your site more easily discoverable by Google and AI.
YC uses and recommends Rails
Y Combinator (the famous startup accelerator that launched companies like Twitch, Reddit, or Dropbox) recently posted their «Vibe Coding Playbook», where they mention Ruby on Rails as their current top choice for tech stack. They write their own internal apps in Rails, too.
You can still use JS within Rails!
Rails apps are just web apps, so you can use all the JavaScript you want within them! Rails ships with Turbo and Stimulus, two tools that minimize the amount of custom JS you'll have to write, but you're fully free to bring in React, Vue, Svelte, or any JS framework!
iOS + Android, same codebase
If mobile (iOS + Android) apps are down the roadmap for you, Rails also comes with Hotwire Native, a technology that allows you to ship hybrid mobile apps very easily, sharing most of the code with the base web app, and allowing you to add fully native screens if needed!
Start vibe coding with Rails today
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