The Open-Source SaaS Development Framework for Ruby on Rails

Lesli provides modular Rails engines and production-ready tools to design, build, and scale modern SaaS applications.



A complete SaaS foundation.

Everything you need to build, scale, and maintain serious products.

Everything your SaaS needs — already built.

Focus on your product, not infrastructure.

Modular Architecture

Extend the platform with plug-and-play modules to build exactly the system you need.

Flexible Authentication Methods

Allow users to sign in using passwords, one-time codes, or magic links.

Detailed User Privileges

Control exactly what each user can see and do with fine-grained permissions.

System Auditing

Track important user and system actions for security, compliance, and transparency.

Activities

See a clear timeline of user actions and system events.

Versions

Track changes and restore previous versions of important data.

Attachments

Upload and manage files directly within any resource across the platform.

Full-text Search

Find data instantly using powerful global and contextual search.

Multilanguage

Support multiple languages and translate both the core system and custom modules.

Theming

Customize the look and feel of the platform across web, desktop, and mobile.

Public Link Sharing

Share content with external users using secure links, passwords, and expiry dates.

Command Interface

Interact with the system through commands, chat, or voice for faster workflows.

A growing ecosystem of production-ready modules.

Plug features into your SaaS instead of building them from scratch.

Build SaaS products in days not months.

Open Source 9+ Production Modules Rails Engine Based

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By developers, for developers

Lesli is designed and maintained using high-quality engineering standards and modern development practices.

Code Generation

Speed up development with enhanced Rails generators and built-in best practices.

UI Templates

Build interfaces faster using ready-to-use components and layout templates.

Responsive Design

Create interfaces that work seamlessly across desktop, tablet, and mobile devices.

Complete Test Coverage

Automated unit and integration tests help keep your software stable and reliable.

Modern Stack

Built on up-to-date tools and frameworks to ensure long-term stability and performance.