Supported Gateways

  • CIM, Braintree, Payment Express, Stripe, and TrustCommerce, all via ActiveMerchant
  • No local credit card storage. All credit card information is stored with the payment gateway, so you don’t have to worry about the PCI implications of storing credit card numbers.
  • Automated billing script runs nightly for anniversary billing.
  • Configurable subscription renewal period (defaults to one month).

What our Customers Say!

Chris Grant

“ A little more than a year ago, I purchased “The Money Train,” an e-book written by Benjamin Curtis. I’ve since purchased a second copy for my business partner because I thought the tips on building an e-commerce site were priceless. We’ve been working on “the meat” of our site and have been putting off the grueling task of building a recurring billing system. Even armed with the knowledge contained in Benjamin’s e-book, there’s a lot of ways to shoot yourself in the foot when it comes to billing code. Let’s face it, the last thing you want to do is write code that accidentally messes with other people’s money. I came across Rails Kits and saw that it was from the same guy that wrote that e-book. Even better, he’d finally done what I wished he had done before: built a best-of-breed billing system using his intimate knowledge of billing systems. I purchased the SaaS Rails Kit and have been working through the code. This really is awesome stuff! Days and weeks of our time have been saved and we couldn’t be happier.”

Jarrett Green

“Amazing product - best $250 I’ve spent in a while.”

Garrett Dimon

“ We were already pretty far along in the development process, so we didn’t use the kit right out of the box. Instead, it was an incredibly useful codebase for selectively pulling out bits and pieces that we needed to implement. It easily saved us a week of implementation time and we were even able to pick up some new coding habits as well”

Eric Campbell

“ I purchased the kit tonight and have been going through the code the past couple of hours. Everything looks very good. This was the last piece for my subscription based service and it couldn’t have come at a more perfect time. It’s sort of funny, because I wrote out a list of features I needed to implement in my subscription based billing 3 days ago, and then I saw this on your blog today and the feature list is almost identical…. having the payment processing section of my app being the only place where I lacked direct experience, it made buying this a no-brainer :)”

Tee Parham

Mobile Foundry

“ We’re using the Saas Rails Kit on a startup site. Even if we just use it as a reference site, it’s totally worth it!”

Brian Ketelsen

“ I’d recommend buying the Rails Kit for Software as a Service from Ben Curtis. It’s $250 well spent on billing/gateway code that has been well tested. I’m using it for a site in production now quite happily.”

Ken Hudson

“ I recently purchased the SaaS Rails Kit. In the process of deploying it to my server I ran into some issues and problems. In all honesty, the issues were related to my lack of knowledge in a couple areas - not any problems with the SaaS Rails Kit itself. None the less, Benjamin Curtis was very responsive and very helpful in helping me analyze and resolve my issues. He really went the extra mile to ensure that I got the help I needed in a timely and effective manner. I sincerely appreciate his assistance and I’m looking forward to using the SaaS Rails Kit to develop a new production application.”

Easy Customization

  • Easy customization of plan levels pricing and custom limits.
  • Ability to tweak limits and fees per account.
  • Self-serve account creation.
  • Self-serve account upgrades and downgrades, with limit checking to prevent downgrading to a plan for which the account does not qualify, based on the plan limits.
  • Account lookups by subdomain (multi-tenant).
  • Ability for users to reset their own passwords (Forgot your password?…)

Simple Code

  • Uses the inherited_resources gem to easily scope all model access to the current account.
  • Comes with a limit on the number of users each account can have, complete with controller code, as an example of how to implement limits.
  • Integration of devise gem, customized for a multi-tenant web service.
  • Compatible with rails 4


We offer a Multiple Site License, perfect for agencies which are looking to save development time for their own products and a separate Single Site License, very attractive to kickstart 3rd party projects.

Multiple Site Licence $999.00
Single Site Licence $249.00

Implementation Details

Here are some details of the implementation, to give you a better idea of what you’re getting when you purchase a license to use this Rails Kit. Below are the key files that make up the guts of the Rails application:



The center of the application. Accounts are created by your customers, and everything associated with your application — users, projects, files, etc. — hang off the Account.t.


This is where the limits are kept, along with how much to charge and when.


Tableless model for passing billing address to the payment gateway.


Emails for account creation, cancellation, up/downgrades, billing receipts, and billing failures.


The plan levels (Free, Basic, Advanced, etc.) and the limits associated with each level.


A typical Devise user model, with one change in the logins and emails having the uniqueness check scoped to the account.



Account creation, up/downgrades, etc.


An example of a basic CRUD controller that shows how to use the account scoping and account limits.

Choose your License

Choose your license based on your development needs. All licenses come with full source code. They are not limited to a set number of developers, but they are limited based on the number of sites you want to build. A “site” is one web application served from one domain, such as


Multiple Site Licence

This license is intended for companies / developers that are building multiple subscription-based services. This would be suitable for companies offering a suite of products, like 37signals, or independent consultants and agencies building solutions for clients. You can build multiple products with the SaaS Rails Kit - Multiple Site License.


Single Site Licence

Suitable for developers building a single hosted web service. If you’re a startup building one product, this is the license for you. You can use the SaaS Rails Kit - Single Site License as the basis for one subscription-based site.

Not sure whether you are going to build multiple sites at this point? You can always buy the Single Site License now and get a discount equal to the cost of the Single Site License on a purchase of the Multiple Site License later.

By purchasing a license you are agreeing to the license agreement

Help & Support

Hi there! We are the RailsKits team, we’re happy to answer all your questions!

Send us a message and we’ll get back to you by email!


Have a question? Comment? Need help? Write us!