Top 12 Open-Source Alternatives to Flet

The top open-source alternatives to Flet are Flutter.dev, Gio UI, and Streamlit. One of the criteria for ordering this list is the number of mentions that products have on reliable external sources. You can suggest additional sources through the form here.

Flutter.dev Landing Page
1

Flutter.dev

Build beautiful native apps in record time 🚀
Pricing:
- Open Source
#Development Tools #Application Builder #Mobile App Development 343 social mentions
Gio UI Landing Page
2

Gio UI

Gio is an open source library for creating portable, immediate mode GUI programs for Android, iOS, Linux, Windows, macOS.
Pricing:
- Open Source
#Developer Tools #GUI Frameworks #GUI Libraries 7 social mentions
Streamlit Landing Page
3

Streamlit

Turn python scripts into beautiful ML tools
Pricing:
- Open Source
#Developer Tools #Content Creators #Application And Data 174 social mentions
htmx Landing Page
4

htmx

high power tools for HTML
Pricing:
- Open Source
#Software Development #Javascript UI Libraries #JavaScript 68 social mentions
Qt Landing Page
5

Qt

Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.
Pricing:
- Open Source
#Development Tools #Rapid Application Development #GUI Frameworks
Capacitor by Ionic Landing Page
6

Capacitor by Ionic

An open source native runtime that makes it easy to build cross-platform apps that run equally well on iOS, Android, and the Web.
Pricing:
- Open Source
#Development Tools #JavaScript Framework #Javascript UI Libraries 112 social mentions
React Native Landing Page
7

React Native

A framework for building native apps with React
Pricing:
- Open Source
#Development Tools #JavaScript Framework #Javascript UI Libraries 216 social mentions
Alpine.js Landing Page
8

Alpine.js

A rugged, minimal framework for composing JavaScript behavior in your markup.
Pricing:
- Open Source
#Javascript UI Libraries #JS Library #JavaScript Framework 14 social mentions
GTK Landing Page
9

GTK

GTK+ is a multi-platform toolkit for creating graphical user interfaces.
Pricing:
- Open Source
#Development Tools #Rapid Application Development #IDE 6 social mentions
Svelte Landing Page
10

Svelte

Cybernetically enhanced web apps
Pricing:
- Open Source
#Javascript UI Libraries #JavaScript Framework #JS Library 356 social mentions
Sciter Landing Page
11

Sciter

Embeddable HTML/CSS/script engine
Pricing:
- Open Source
#Development Tools #Rapid Application Development #Cross-Platform Development 67 social mentions
Uno Platform Landing Page
12

Uno Platform

Build Mobile, Desktop and WebAssembly apps with C# and XAML.
Pricing:
- Open Source
#Development Tools #Rapid Application Development #Cross-Platform Development 65 social mentions