UI Overview
RailsFast uses Tailwind 4.3+ for all its UI. The components are all Tailwind too, so if you're already familiar with it you'll feel right at home. You can do in RailsFast whatever you would usually do with any Tailwind project!
You can either write your own UI components from scratch using Tailwind, or use any UI components library like Tailwind Pro or Shadcn, or any other you are familiar with. Just bring your components and you're ready to go!
However, since RailsFast aims at providing you with a really fast speed to market, I thought it would be a good idea to include some very common and useful components you could just mix-and-match like LEGO blocks to quickly build marketing landing pages and UIs. I think that (as long as you already have the copy text ready) you could put together entire SEO-optimized, conversion-oriented marketing pages in 10 or 20 minutes, which I think it's extremely powerful.
You're not forced to use any RailsFast components, though: you can just ignore them if you'd rather use your own stuff. But I really think you'd love them, not only because they harness the full power of RailsFast, but because some of them (like the testimonials component) are so complete they could very well replace entire separate SaaS subscriptions that you'd need to achieve the same results. You can edit any component to tailor it to your needs and styles, too!