# Lesli > Lesli is an open-source Ruby on Rails framework for building scalable, secure, and customizable SaaS applications. Built by Lesli Technologies in Guatemala City. ## What Lesli Is - A modular SaaS framework (not a starter kit, admin panel, or boilerplate) - Built on Ruby on Rails 8.0, PostgreSQL, Hotwire, Bulma, Alpine.js - Free and open-source under GPLv3 - 8 production-ready engines, 5 supporting gems - 11,900+ commits on GitHub Use the resources below to understand the framework, its engines, gems, installation, and architecture. ## Getting Started - [Install Lesli](https://www.lesli.dev/start): Installation and initial setup - [Core documentation](https://www.lesli.dev/lesli): Main framework documentation - [Demo](https://demo.lesli.dev): Public demo instance ## Documentation - [Documentation home](https://www.lesli.dev): Main documentation entrypoint - [Engines](https://www.lesli.dev/engines): Index of framework engines - [Gems](https://www.lesli.dev/gems): Index of supporting gems - [Notes](https://www.lesli.dev/notes): Articles, release notes, and technical notes ## Engines - [Admin](https://www.lesli.dev/engines/admin): Administration and system settings - [Audit](https://www.lesli.dev/engines/audit): Activity tracking, versioning, and analytics - [Babel](https://www.lesli.dev/engines/babel): Translation and multilanguage management - [Bell](https://www.lesli.dev/engines/bell): Notifications - [Calendar](https://www.lesli.dev/engines/calendar): Calendar features - [Dashboard](https://www.lesli.dev/engines/dashboard): Dashboards and analytics - [Shield](https://www.lesli.dev/engines/shield): Authentication and access control - [Support](https://www.lesli.dev/engines/support): Support ticket system ## Gems - [LesliAssets](https://www.lesli.dev/gems/assets): Shared frontend assets - [LesliDate](https://www.lesli.dev/gems/date): Datetime helpers and formatting - [LesliSystem](https://www.lesli.dev/gems/system): Core system utilities - [LesliView](https://www.lesli.dev/gems/view): UI components and view helpers - [Termline](https://www.lesli.dev/gems/termline): Human-friendly terminal output ## Project - [GitHub repository](https://github.com/LesliTech/Lesli): Source code - [Lesli Technologies](https://www.lesli.tech): Company website ## Optional - [Contact](mailto:hello@lesli.tech): Project contact