LicenseSeat
Software license key management for indie developers. Sell licenses, manage seats, handle activations.
by @rameerez
Built by the founder who scaled PromptHero to 4M+ monthly users
Launch your
vibe coded app
this weekend
RailsFast is the best Rails SaaS boilerplate for vibe coding. Optimized to get you to make your first $1 fast. Payments, auth, DB, deployments, backups: everything already done and working. Clone the starter kit, tell Claude Code or Cursor what to build, and launch.
+50
5.0
Builders are shipping with RailsFast
Everything included
Auth
Live payments
Secure
Database
Backend
Tasks
Emails
Backups
Works with
"Super excited. I purchased the day you announced. I'd be happy to purchase again."
Joe, RailsFast Customer
@ai_and_wifi
"So good! I'm a big fan of the gems!"
Felipe Fontoura
@felipefontoura
"Loving the product and the docs! I learned a lot just by reading the setup template. Only with that I already felt it was worth paying."
David, RailsFast Customer (via email)
Indie Developer
"A Rails template so you don't need to rely on vibe-coding for your auth/billing"
Marc Köhlbrugge
@marckohlbrugge
"Vibecoding is amazing. But you're doing it wrong. Once you go past 1,000 lines, you've created a spaghetti monster you have to beg to run. Solution: use a base template optimized for vibecoding. RailsFast is EXACTLY THAT."
Javi Lopez
@javilopen
"Rails templates like this are underrated. Vibe-coding is fun for experiments but auth/billing bugs in production are painful. Boring infra should just work."
Andre Simoes
@oandresimoes
"Bought it to support more Rails devs. Hoping to learn from RailsFast!"
Sam Kantor
@Sam_Kantor
"The RailsFast template allows me to prototype ideas without having to fully code the main features myself anymore. What drew me to RailsFast was the AI integration"
Stephen, RailsFast Customer (via email)
Building hobby apps with Rails for over 15yrs
"Super excited. I purchased the day you announced. I'd be happy to purchase again."
Joe, RailsFast Customer
@ai_and_wifi
"So good! I'm a big fan of the gems!"
Felipe Fontoura
@felipefontoura
"Loving the product and the docs! I learned a lot just by reading the setup template. Only with that I already felt it was worth paying."
David, RailsFast Customer (via email)
Indie Developer
"A Rails template so you don't need to rely on vibe-coding for your auth/billing"
Marc Köhlbrugge
@marckohlbrugge
"Vibecoding is amazing. But you're doing it wrong. Once you go past 1,000 lines, you've created a spaghetti monster you have to beg to run. Solution: use a base template optimized for vibecoding. RailsFast is EXACTLY THAT."
Javi Lopez
@javilopen
"Rails templates like this are underrated. Vibe-coding is fun for experiments but auth/billing bugs in production are painful. Boring infra should just work."
Andre Simoes
@oandresimoes
"Bought it to support more Rails devs. Hoping to learn from RailsFast!"
Sam Kantor
@Sam_Kantor
"The RailsFast template allows me to prototype ideas without having to fully code the main features myself anymore. What drew me to RailsFast was the AI integration"
Stephen, RailsFast Customer (via email)
Building hobby apps with Rails for over 15yrs
Save hundreds of hours building your idea and get your first customer, fast
Let's be honest: all software is 90% the same. We all need to take payments, authenticate users, send emails, handle uploads, do backups... That's exactly what RailsFast handles: the undifferentiated heavy lifting, so you (and your AI) can focus on the 10% that actually matters.
Bypass repetitive work
90% of building a SaaS is setting up stuff over and over again. RailsFast eliminates time drains like manually setting up payments, authentication, backups... which can take hundreds of hours.
Engineered for revenue
RailsFast has been engineered for revenue from the ground up. Every decision has been made with making revenue and running a business as easy and straightforward as possible.
Optimized for #1 ranking on Google & LLMs
Everything in RailsFast has been SEO optimized from the beginning so you get more traffic. Get Google to understand and rank your page higher, and OpenAI and LLMs to discover your site easily.
Rails: your secret weapon for vibe coding
The world's best startups use Rails, and even Y Combinator recommends Ruby on Rails as the best framework for AI-assisted coding. RailsFast gives you a head start.
All these unicorns were built with Ruby on Rails
Build anything you can imagine
RailsFast is perfect for you, whether you're building a B2B SaaS, a consumer app, or any kind of web application. Here are some ideas of the kind of things you can make come true with RailsFast:
SaaS
Directories
AI apps
Internal tools
Image generation apps
LLM wrappers
Marketplaces
Job boards
Membership sites
Personal websites
Real products made with RailsFast
SummaryAI
Summarize anything with AI. Get a clear, accurate summary in seconds, powered by the best AI models.
by @martiano
Made by a founder who's actually done it
Battle-tested with millions of real users
Most boilerplates are built by people who've never shipped or scaled a real product. RailsFast isn't. I'm Javi (@rameerez), a software entrepreneur, and everything in RailsFast comes from a decade+ of learnings validated in the real world, years of building dozens of Rails-based startups and scaling them to millions of monthly users.
- I've been building, shipping, and scaling Rails apps for the last 10+ years
- I built and sold PromptHero, one of the biggest AI image communities on the internet, scaling it to 4 million monthly users on the exact stack you're getting with RailsFast
- I've made 15+ open source gems for Ruby on Rails, with over 120,000+ downloads
- This exact stack generated me millions of free SEO clicks over the years
RailsFast scores 10/10 email deliverability on mail-tester.com and has generated millions of impressions and clicks in Google SEO
Everything you need to go from zero to money-making business
RailsFast comes with pretty much everything you'll need to build and run a software business: it's almost a startup-in-a-box. It's a complete full-stack (front-end + back-end), production-ready system – not just a toy or a simple front-end boilerplate.
Secure
Users & authentication
Allow your users to register and log in securely. You own and control everything, all data, no need for 3rd party integrations that can be hacked or misconfigured.
- Email/password authentication
- Recover lost password flow
- Email confirmation flow
Revenue ready
Payments
Start taking payments and collecting revenue on day one. Full Stripe integration with subscriptions, one-time payments, webhooks, and customer portal.
- Both subscriptions and one-time payments
- Webhook handling
- Customer portal to self-manage subscriptions
Easily scalable
Database & migrations
RailsFast comes with PostgreSQL as its database. It's fully configured and ready to go with all migrations out of the box, so you don't have to worry about a thing.
- Postgres is the industry de-facto standard
- Production-ready, ready to power big apps
- Scalable & easy to migrate to managed
Emails
Send transactional emails that look professional and well-branded out of the box. Works for all email clients without having to write any email-specific HTML.
- No more ugly plain text emails
- Comes with signup + payments email flows
- Integrates with SES for cheap emailing
Background jobs & Cron
Schedule and run async tasks at any time. Have a horde of robots working for you in the background, organizing data and performing long-running operations.
- Error handling
- Configurable retries
- Schedule tasks as if they were cron jobs
File uploads
Allow your users to upload images and files to your app, like user avatars, post content, blogpost attachments, etc. Comes with image processing out of the box.
- Scale images to different sizes automatically
- Optimize images for webp automatically
- Works with any S3-compatible storage
But there's more
Where others stop, we double down
Most boilerplate templates stop where the difficult parts begin. We tackle them head-on. That's why RailsFast ships with robust, elegant solutions to common yet complex SaaS problems that you'd need expensive subscriptions or hundreds of hours in engineering to solve.
Pricing plan enforcement
It's one thing to charge money, but it's a completely different thing to define pricing plans and enforce their limits.
- Avoid users going over their plan limits
- Gate access to features based on plan
Usage credits
Most AI apps use some sort of credits system to charge for usage. Fully-featured, robust and production-ready credits system.
- Credits with monthly/weekly/yearly refill
- Allow users to buy power packs at any point
Fake users protection
Blocks disposable emails from signing up to your app, automatically. Prevent unauthentic usage (fake, bot & spam users) in your app.
- Built-in CAPTCHA protection with Turnstile
- Daily update of disposable domain names
Easy to add
Vector database & RAG
RailsFast comes ready to work with pgvector if needed, making your project capable of RAG and AI retrieval.
- Turn your DB into a vector database with RAG capabilities
- No 3rd party databases needed
AI rules & context
Ships with pre-written Cursor rules and rich context that teach agents exactly how your app works, and how to build it right.
- The AI understands your codebase at a glance
- Ready to work with Context7 for extra context
COMING SOON
Generative AI & LLMs
RailsFast works out of the box with generative AI services like Replicate or Fal; and LLM APIs like ChatGPT, Claude, etc.
- Build AI-heavy apps easily
- Leverage the most popular AI APIs
Monitoring
Get a status page to check the health of your business at a glance: not only technical systems, but business metrics too.
- Add simple smoke tests to monitor app health
- Ready to use with uptime services
COMING SOON
Self-serve API keys
Offer your service as an API easily. Allow users to get a secure API token to interact with your API, and auth them easily.
- Dashboard to manage and self-serve API keys
- Secure token-based API authentication
MRR dashboard
Know instantly key metrics for your SaaS like MRR, ARR, valuation & churn. Keep an eye on the health of your business.
- How much is your business worth?
- See valuation & churn calculations at any point
Caching
Cache entire pages or parts of pages so that your server doesn't read from DB on every request. It just takes one line of code.
- Speed up the load time of any page easily
- Avoid your database being the bottleneck
Backups
Back up your entire database to the cloud automatically. Daily backups by default, but change easily to hourly, weekly, etc.
- All working out of the box
- Backups live in the cloud for resilience
Rate limiting & scraping protection
Prevent users from making too many requests to your app or API, and protect from DDoS attacks and scraping attempts.
- Add rate limiting to any page or action
- Only one line of code required
SEO & Metadata
Rank higher on Google and get discovered by LLMs easier. Everything in RailsFast is optimized for SEO, with the right metadata.
- Easily set OG metadata for FB, X, Discord...
- Set dynamic social images per page
Hosting & SSL
Deploy your app easily into any VPS with one single command. All traffic is secured with SSL certificates.
- Free, auto-renewable SSL certificates
- Deploy to your server with one command
Secrets
Other templates handle secrets in insecure ways. All secrets and credentials in RailsFast are encrypted and never commited to git.
- Prevent credential leaks
- No ENV gymnastics needed
Analytics & admin dashboard
Manage users, view analytics, and monitor your business metrics.
- User management
- Analytics dashboard
A library of UI components to build at the speed of light
RailsFast ships with a collection of UI components that are designed to work together, so you can quickly put together landing pages and user interfaces. They're designed for LLM usage with thorough docs, so you can just tell the AI to mix and match them like LEGO pieces, and you will get beautiful, high-conversion sales pages in no time (this landing page has been built this way!)
- Hero
- Navbar
- Pricing cards
- Features
- Bento & grid
- FAQ
- Footer
- Testimonials
- ...and more
RailsFast is built with
RailsFast UI is built with Tailwind CSS, so you can bring your own components or any paid design system like Tailwind Plus
Stop getting surprise Vercel bills. RailsFast runs on $5 servers.
RailsFast is designed to run on flat-price VPS servers that will take you from zero to thousands of users predictably, without worrying about traffic spikes. If you go viral and start receiving lots of users, scaling up is trivial (and cheap!) Expect to pay dozens, not thousands of dollars. The typical RailsFast app can run on a $5-$15/mo VPS (PromptHero ran on $119/mo serving millions!) And you can even fit multiple RailsFast projects in the same server!
Monthly price
Vercel and similar
😳 $1,000+
Surprise bills
The RailsFast way
Your own VPS server
FLAT
Predictable, fixed price
| Vercel and similar |
Your own VPS server
The RailsFast way
|
|
|---|---|---|
| Monthly price |
😳 $1,000+ Surprise bills
|
FLAT Predictable, fixed price
|
| Viral traffic | ❌ Unpredictabe bills of thousands of dollars if your site goes viral or traffic spikes suddenly | ✅ Plenty of TBs of traffic are usually included with most VPSs, and overage is cheap |
It's easy: you'll get up and running with your own self-hosted VPS as part of the RailsFast quickstart. RailsFast doesn't sell hosting, but we'll help you get your app in production on your own server in less than 15 minutes.
💸
RailsFast is your fastest route to: «I just made my first $200 while I slept last night, holy shit!»
Start riding the vibe coding wave today
One-time purchase. Lifetime access. No subscriptions.
Startup
$399
$
99
For indie hackers, entrepreneurs, and startups building their own projects.
-
Everything included: auth, payments, database, backend, background jobs, deployment, SEO optimizations...
-
Unlimited personal projects you own
-
Commercial purposes allowed
-
Lifetime access: buy it, keep it forever
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1 year of updates included, with optional updates after
-
Standard support
Best Value
Agency
$1,299
$
949
For agencies, companies, and freelancers building projects for other people.
-
Everything included: auth, payments, database, backend, background jobs, deployment, SEO optimizations...
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Client projects allowed (pays for itself with a single client project!)
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Use on unlimited client projects
-
Commercial purposes allowed
-
Lifetime access: buy it, keep it forever
-
1 year of updates included, with optional updates after
-
Priority support
Frequently Asked Questions
Of course! You don't need to be a Rails expert. In fact, the RailsFast quickstart starts from zero, without any assumptions about what your current knowledge about Ruby on Rails is. With that being said, as with everything in life, the more experience you have, the more value you will extract from it. AI writes very good Rails code, especially if you give it good context as we do in RailsFast, so odds are you'll do just fine. RailsFast is designed so you can get started with minimal technical knowledge, with the help of AI assisted coding. I believe you’ll quickly get the hang of it.
Yes! I believe RailsFast is a great learning tool. Through the docs, we'll take a very hands-on approach to start developing web applications, so this is a great way to get your hands dirty, and you'll learn by doing. On top of that, RailsFast sticks to the Rails standards (Rails omakase), so what you learn will be immediately valuable and transferable to any other Rails project you may work on.
I'll be honest: ideally, yes – at least to some degree. You should know the basics. You may get away with pure vibe coding (letting the AI write all the code without you checking anything), but I don't think that will lead to the best results. To be a good manager, you need to know what you're doing: that applies to AI-assisted coding and to every other job in life. There's nothing worse than being managed by someone who's clueless, so imagine how difficult it must be for an AI to follow orders of someone who keeps giving contradictory commands. I suggest you browse the RailsFast docs before purchasing to see if you're comfortable with the level of technical jargon used. You should be familiar with things like Git, ssh, and running terminal commands -- but you can (and should!) use AI to get up to speed if you don’t know what something means! I truly believe the barrier of entry is the lowest it's ever been, and you can learn 80% of what you need in a couple weeks thanks to AI. This is not specific to RailsFast, by the way, any other AI-first coding platform claiming you can build entire products with zero coding knowledge is outright lying to you. The technology is not quite there yet.
Yes! Check it out at railsfast.com/docs – it's quite thorough and it has a 15-minute quickstart that will leave you with an app already fully working in production!
Of course! You can build any kind of app, hobby project, web experience, B2C or B2B product you can think of! You can even build an iOS and Android app with the same RailsFast codebase if you use Hotwire Native!
Of course! RailsFast apps look and feel like any other modern SaaS. RailsFast uses Stimulus and Hotwire / Turbo (Rails-native technologies) to achieve interactive, dynamic experiences with minimal code! It truly feels like magic the first time you use it, especially if you come from React and the like, where everything is super verbose and covoluted. In any case, you can use any JavaScript library together with RailsFast, so you can build with the same level of interactivity with the tools you're more comfortable with!
Everything! RailsFast integrates with Stripe for payment processing, so we support both one-time payments and recurring subscriptions.
Yes! RailsFast is a living, breathing template by design, because it’s the exact same template I use for my own projects. In fact, I’m currently dogfooding it to myself by building new apps with it, and I’m updating it as I go, so you'll get updates as I build new stuff too. And since this is the exact stack I use for my own products, I made it easy to upgrade, so RailsFast will remain maintainable as your business grows.
Yes! First of all, the docs have extensive tutorials with videos to walk you through the whole process from 0 to deployed, onboarding, adding a feature etc. If you come across any problem, just reply to your RailsFast purchase email for support.
No. Most stores don't accept returns on digital goods, for good reason. Why? Well, because of the very nature of the product: you may purchase it, ask for a refund, and you'll always still keep a copy by default. I have no way of knowing whether you asked for a refund for a legit reason or with the intent of tricking me and getting the product for free. For that reason, all RailsFast sales are final. We cannot accept any returns on RailsFast: once purchased, it cannot be refunded. With that being said: if you truly had a problem and you really think you should get a refund, write to the support email and I'll evaluate it on a case by case basis, but the default answer is: no, there are no refunds.
Yes, and you have no idea how much this can scale on just a single server. I built PromptHero on the same stack, and it did 4M monthly visitors just fine: it ran on one single machine until several thousands of users a day, and I mainly just had to put the database on its own separate server to make it scale further. The total cost of running all the infrastructure was $120/mo. The technology RailsFast uses scales just fine. Other startups running on Ruby on Rails (not RailsFast) like Shopify have scaled the stack up to millions of requests per second. You'll run out of customers long before you run out of scaling capacity.
Yes! For UI, RailsFast uses Tailwind, which the AI excels at. You will be able to create entire pages in minutes, beautifully designed. Still to this day I get surprised how good the AI is at writing Tailwind screens over plain CSS or Bootstrap, for example. For interactivity, RailsFast uses Stimulus + Hotwire, both of which are very straightforward and well-documented. RailsFast links to their latest docs, and the AI does a fantastic job at writing clean, elegant, interactive components with it.
Yes, but! RailsFast uses JavaScript like any other website out there. You can use whatever frontend tool, library or framework you want along with RailsFast: React, Vue, Next, Nuxt, Svelte, Inertia – whatever you want. You can add anything, but I believe you won't need to: Rails ships by default with Hotwire and Stimulus, the recommended way of writing frontend for Rails apps. I really, really, really encourage you to try it. You can do everything a React/Vue/Svelte app can do, but with minimal JavaScript code. It feels like magic. The AI will glide through interfaces written with Hotwire + Stimulus because there’s so much less code to write and understand. But of course nothing is stopping you from adding more JS libraries: just pin them in the importmaps file and you're ready to go.
Not really, you're pretty much done after the 15 min quickstart. Yes, 15 minutes is all it takes to get started. That leaves you with an already hardened server, fully configured and ready for production workloads. To give you an idea: in the last ~year I never had to do any server-specific maintenance work. Docker handles all the difficult stuff for you under the scenes, so your app can essentially run wherever Docker can run. And if you want to upgrade your server, or just tear ir down and put it up again from scratch, or if you need to deploy elsewhere, you can just go over the 15-minute quickstart again and you'll have your app deployed in production again. This doesn't mean you should be completely hands-off about servers: of course, the more competent you are the most you will take advantage of your infrastructure, and the better you will be at managing a server – but the current baseline minimal requirements for running a VPS are pretty low, if not non-existent. And AI is extremely good at figuring out any server problem you may come across, so you'll be able to do anything you may have to do in your server while the AI holds your hand the entire time.
You can customize everything in RailsFast, including the components that make up the UI template! You can (and will!) tailor RailsFast to your own needs. But just so that we're on the same page: RailsFast is not just a front-end template, it’s an entire full-stack system. The frontend is just the tip of the iceberg, what’s really important is all the weight RailsFast is lifting for you behind the scenes. I suggest forgetting about the frontend for a minute: don't go for other template just because you like their design better, you can ask the AI to copy you any design with Tailwind in a matter of minutes. I'd argue the design of RailsFast, while sufficient, is the least relevant thing. AI can can redesign any screen easily however you want: have Cursor or Claude change any component for you, or bring and use your own Tailwind components you have from another project. I made RailsFast frontend components to allow you to put together pages faster, but what's important here is the entire full-stack system. You can swap the front cover any time.
RailsFast doesn't lock you in to anything. I make recommendations of services or technologies that work well with RailsFast and that you will probably like using. For example, I recommend deploying RailsFast apps to Hetzner, because the price and quality of their servers is just unbeatable. But if you don't like Hetzner for servers, you can switch to DigitalOcean, Linode or AWS at any moment. I recommend sticking to the defaults I outline in the docs, but there's nothing stopping you from changing anything at any point.
Stop scrolling.
Start shipping.
You could be running your own software business by next week.
Pro tip: browse the docs, they're free to read!
