Flet
Build modern cross-platform apps in pure Python.
- Status
- Generally available
- Last checked
- Checked · Oct 15, 2026
- License
- Open source
- Pricing
- Free tier · from $0
What it is
Flet is a cross-platform GUI framework that allows developers to create modern applications using only Python. It simplifies the process of building desktop, web, and mobile apps with a single codebase.
Flet stands out as a Python-centric solution that simplifies cross-platform app development, offering a single codebase approach with modern UI components.
When it fits — and when it doesn’t
A good fit for
Python developers looking to build cross-platform apps with minimal effort
Teams that want a unified codebase across desktop, web, and mobile platforms
Look elsewhere if
Projects requiring deep customization of native UI elements on each platform
Developers who prefer using multiple languages or frameworks for different platforms
Known weaknesses
Each one links to the public issue, changelog or docs page it came from, where we have one.
- 01
Limited third-party integrations and plugins
Small ecosystem compared to more established frameworks like Flutter or React Native
- 02
Performance issues with complex UIs
Real-time updates using WebSockets can lead to lag in applications with a large number of components
What it does well
Cross-platform development with a single codebase
Modern UI components for desktop, web, and mobile apps
Real-time updates using WebSockets
Built-in state management
Pricing
- Free tier
- YesOpen source — free to use
- Paid from
- $0
- Model
- Flat rate
- Enterprise plan
- No
Pricing not independently confirmed — check the vendor’s page.
Performance benchmarks
How Fast Is It?
Set up Flet
Setup steps, common gotchas and what to check after 30 days.