Themes, engines, and multi-tenant deployment — everything you need to ship a production SaaS on Rails.
Cancel anytime. Your generated code stays yours.
<%= render Rubato::CardComponent.new(shadow: :lg, border: :red) do %> <%= render Rubato::BadgeComponent.new(variant: :red) do %> Most popular <% end %> <h3>Team</h3> <%= render Rubato::ButtonComponent.new(variant: :primary) do %> Subscribe <% end %> <% end %>
↑ Rendered with the code above. No CSS to write.
Trusted by Rails teams building real products
"[ Placeholder quote about how RailsComposer themes saved time on a recent project. ]"
— Developer Name, Role at Company
"[ Placeholder quote about flexibility / Rails-native fit. ]"
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Every theme ships ~40 ViewComponents, a custom Tailwind palette, and a one-command installer. All themes — current and future — are included in your subscription.
Ruby-themed. Custom ruby-* palette anchored at the Ruby logo red — the theme behind RailsComposer itself. Great for developer tools and Ruby-adjacent brands.
Patriotic. Red, white & blue ViewComponents — the theme behind my political apps. Civic, campaign, and US-market SaaS.
Clean and professional. A crisp indigo-and-amber palette and restrained, well-spaced ViewComponents — built for dashboards, business apps, and SaaS products that need to look polished and trustworthy out of the box.
Warm and whimsical. Teal and orange on a soft cream background — the theme behind the Podaroo podcasting app. Great for friendly, creative, consumer-facing products.
Dark and mysterious. Deep indigo backgrounds with an amber accent — a movie-theater, superhero feel. The theme behind the Top End Devs tutorial and training app.
New themes ship throughout the year. Every one is included in your subscription, automatically.
Mountable Rails engines for billing, authentication, users, and access control — the SaaS plumbing every app needs, ready to mount and customize.
Full UI for subscriptions, plans, customer billing, and payment history.
Invite, suspend, impersonate, and manage users across your app.
Define and assign roles with fine-grained permission controls.
Authentication engine — email/password, confirmation, password reset, session tracking, and brute-force protection. Optional multitenancy and Google OAuth generators.
Gems built for shipping Rails apps faster. Some are free forever; the rest come with your subscription.
Generate an OpenAPI 3.0 document from your Rails minitest API tests. An rswag-style workflow that doesn't require rspec.
On GitHub →Deploy and manage multiple SaaS tenants on shared infrastructure via Kamal and Docker, with built-in orchestration and billing integration.
Free tools when the value is in the ecosystem. Paid tools when they save real time on real apps. Subscribers get the paid ones automatically.
One plan unlocks every theme — current and future — plus the paid tools.
Add the gem, run the installer, get a tailored Tailwind setup wired into your app.
Drop in ViewComponents wherever you need them. Customize freely — generated code is plain ERB.
# Gemfile gem "rubato", github: "RailsComposer/rubato", branch: "main" # Terminal $ bundle install $ bin/rails generate rubato:install
Cancel anytime. Open-source tools (like minitest-openapi) are free regardless.
Everything included. 1 developer, unlimited own projects.
or $399/yr — or $999 once, yours for life
Everything included. Unlimited developers at 1 company.
or $799/yr
Everything included. Unlimited developers, client projects, white-label rights.
or $1,599/yr
Cancel anytime. Code you've generated is yours forever. Questions? Email us.
RailsComposer
minitest-openapi are free regardless — you can use them without subscribing.
Subscribe and start rendering — or browse the free tools first.