Lesli

Lesli is a SaaS Development Framework designed to help you build highly scalable, secure, and customizable software products with ease.

It’s built on top of industry-proven technologies like Ruby on Rails, PostgreSQL, Hotwire, Bulma, SASS, AlpineJS and many other fantastic open-source libraries, gems, and tools.

Lesli provides a robust set of built-in features and a standard process for extending its capabilities through modules, making it easy to create your own custom components when needed.

Lesli goes beyond being just a starter kit or boilerplate. It’s a Ruby on Rails-based core gem that enables you to build modular applications (a.k.a. engines) by leveraging its built-in features, generators, components, and industry best practices. With Lesli, you can easily extend existing functionality or develop fully customized solutions tailored to your specific needs.

Why Lesli?

Lesli is fully open source and comes packed with tools and features that can save you months of development time. Thanks to its modular architecture, you can seamlessly extend Lesli’s functionality by adding pre-built modules — allowing you to get your SaaS product up and running in minutes.

Lesli is published under the GNU General Public License version 3 (GPLv3). This means you’re free to use, copy, redistribute, and/or modify Lesli, as long as you comply with the terms of the GPL.

How Does It Work?

Lesli was built with modularity and extensibility at its core. Need task management? Just install the Tasks module. Want an event calendar? There’s a module for that too. Looking to add a comment system to your blog? Simply inherit from the base controller.

There are several ways to take advantage of Lesli’s features:

• Install official modules directly through gems.
• Extend existing functionality by inheriting from Lesli controllers and models.
• Integrate specific features into your app via service objects.
• Leverage Lesli as an API-first backend for your web or mobile applications.

Ruby on Rails

By using Rails as its foundation, Lesli benefits from Rails’ mature ecosystem, conventions, and built-in features. Rails simplifies common tasks such as routing, database management, and user authentication, allowing developers to focus on building the core functionalities of their SaaS applications more efficiently.