Ruby on Rails SaaS Development Framework.

Lesli is a SaaS development framework designed to build highly scalable, secure and customizable software products.

Built-on top of Ruby on Rails, Postgres, Hotwire, Bulma, SASS and many more awesome open-source libraries, packages, gems and tools.

Lesli is completely open source and comes with features and tools that can save you years of development effort, additionally, our pre-built modules can seamlessly extend Lesli's functionality, allowing you to build your own SaaS in a matter of minutes.

Lesli is currently in alpha, but we're excited about the promising improvements coming soon!

Lesli is officially released and will be supported as of version 5.1

Lesli goes beyond being just a starter-kit, template, admin panel or dashboard. Lesli is a Ruby on Rails gem that you can use to build modules (a.k.a. engines) and standard Rails applications leveraging its robust set of built-in features, generators, components, and industry standards. With Lesli, you have the flexibility to extend existing functionalities or develop fully customized software tailored to your specific needs.

• online demo
• docker demo

# Add Lesli engine
bundle add lesli

# Add Lesli to your app
rails generate lesli:install

# Setup database for development
rake lesli:db:dev

# Start your app
rails server

# clone the lesli repo inside your engine folder: RailsApp/engines
git clone https://github.com/LesliTech/Lesli.git

# Load Lesli as a Gem
gem "lesli", path: "engines/Lesli"

# Install the necessary Gems to run Lesli
bundle install

# Generate Lesli initializer
rails generate lesli:install

# Hard reset Database for development:
rake lesli:db:reset 

# Run default Rails server
rails s 
rails s --binding=0.0.0.0
rails s --environment=test
rails s --environment=development
RAILS_SERVE_STATIC_FILES=true rails s --environment=production 

• website
• documentation

• X: @LesliTech
• Email: hello@lesli.tech
• Website: https://www.lesli.tech

Copyright (c) 2025, Lesli Technologies, S. A.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Ruby on Rails SaaS Development Framework.