Best gtkmm Alternatives in 2026
The top gtkmm alternatives are Flutter, Electron and .NET MAUI: 15 desktop app development frameworks our editors would look at instead of gtkmm, in our ranking order.
gtkmm: A free C++ interface for GTK, aimed at developers building GTK applications. Where it falls short: requires GTK, so it is a focused choice rather than a general c++ framework..
Switching from gtkmm? For most desktop app development frameworks buyers the best gtkmm alternative is Flutter, built for teams building across platforms with one UI codebase.
Why People Look for a gtkmm Alternative
- Requires GTK, so it is a focused choice rather than a general C++ framework
- Community and documentation are the listed support channels
- Does not target mobile development
- No mobile targets — 1 of the alternatives below has it
Quick Picks by What You Need
- Best overallFlutter9.3
Teams building across platforms with one UI codebase
Visit Flutter - Best free optionFlutter9.3
Has a free plan
Visit Flutter - Best for mobile targetsCompose Multiplatform8.7
Mobile targets (gtkmm: no)
Visit Compose Multiplatform
All 15 gtkmm Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
-
Best forTeams building across platforms with one UI codebase
- Better than gtkmm:
- Editor score 9.3 vs 7.1
An open-source Dart framework for building cross-platform apps from shared UI code.
- Open source
9.3/10★★★★★Visit Flutter -
Best forJavaScript teams building desktop apps
- Better than gtkmm:
- Editor score 9.1 vs 7.1
An open-source framework for building desktop apps from a shared JavaScript codebase.
- Open source
9.1/10★★★★★Visit Electron -
Best forC# teams targeting desktop and mobile
- Better than gtkmm:
- Editor score 9.0 vs 7.1
.NET MAUI shares C# and XAML development across native mobile and desktop apps.
- Open source
9.0/10★★★★☆Visit .NET MAUI -
Best forC++ teams needing a full-featured IDE
- Better than gtkmm:
- Editor score 8.9 vs 7.1
A full-featured C++ and QML IDE with broad build, debug, test, and deployment tools.
- Open source
8.9/10★★★★☆Visit Qt Creator -
Best forPython teams building Qt desktop applications
- Better than gtkmm:
- Editor score 8.8 vs 7.1
A broad Qt toolkit for Python desktop apps, with Android deployment and a commercial licensing path.
- Open source
8.8/10★★★★☆Visit Qt for Python -
Best forKotlin teams sharing declarative UI across platforms
- Better than gtkmm:
- Mobile targets
- Editor score 8.7 vs 7.1
A free Kotlin framework for shared UI, with JVM desktop apps and platform-specific installers.
- Mobile targets
- Open source
8.7/10★★★★☆Visit JetBrains -
Best forC# developers building Windows-only desktop apps
- Better than gtkmm:
- Editor score 8.6 vs 7.1
A free, Windows-only .NET framework for C# desktop interfaces built with XAML.
- Open source
8.6/10★★★★☆Visit Microsoft -
Best forJava teams building cross-platform desktop UIs
- Better than gtkmm:
- Editor score 8.5 vs 7.1
A broad Java UI toolkit for cross-platform desktop applications, with mobile and embedded support.
- Open source
8.5/10★★★★☆Visit OpenJFX -
Best forTeams building desktop GUIs with C or language bindings
- Better than gtkmm:
- Editor score 8.4 vs 7.1
A free, cross-platform toolkit for desktop GUIs, with widgets and multiple language bindings.
- Open source
8.4/10★★★★☆Visit GTK -
Best forTeams wanting visual design and native app toolchains
- Better than gtkmm:
- Editor score 8.3 vs 7.1
A Windows-based IDE pairing visual design tools with native Object Pascal toolchains.
8.3/10★★★★☆Visit Delphi -
Best forC++ teams needing a native cross-platform GUI API
- Better than gtkmm:
- Editor score 8.2 vs 7.1
A free, open-source desktop GUI library for C++ teams targeting multiple platforms.
- Open source
8.2/10★★★★☆Visit wxWidgets -
Best forPython developers using the Qt ecosystem
- Better than gtkmm:
- Editor score 8.1 vs 7.1
A broad Qt toolkit for Python GUI apps across desktop and mobile platforms.
- Open source
8.1/10★★★★☆Visit PyQt -
Best forPascal teams wanting a free visual desktop IDE
- Better than gtkmm:
- Editor score 8.0 vs 7.1
A visual Free Pascal IDE with building, debugging, testing, and desktop platform support.
- Open source
8.0/10★★★★☆Visit Lazarus -
Best for.NET teams building cross-platform interfaces
- Better than gtkmm:
- Editor score 7.9 vs 7.1
A cross-platform .NET framework with a free core and paid tooling, controls, and support.
- Open source
7.9/10★★★★☆Visit Avalonia -
Best forDelphi or C++ teams wanting an integrated IDE
- Better than gtkmm:
- Editor score 7.8 vs 7.1
An integrated toolchain for native desktop and multi-device app development, with a paid edition structure.
7.8/10★★★★☆Visit Embarcadero
gtkmm Alternatives: Common Questions
What is the best alternative to gtkmm?
Flutter: #1 in our Desktop App Development Frameworks ranking, with an editor score of 9.3 out of 10. An open-source Dart framework for building cross-platform apps from shared UI code.
Is there a free alternative to gtkmm?
Yes. Flutter, Electron, .NET MAUI, Qt Creator and Qt for Python have a free plan or a free tier (14 of the 15 alternatives on this page).
Why do people look for gtkmm alternatives?
Requires GTK, so it is a focused choice rather than a general C++ framework; Community and documentation are the listed support channels; Does not target mobile development.
How do I switch from gtkmm?
Export your data from gtkmm (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel gtkmm.
How to Switch from gtkmm
- Export your data from gtkmm (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel gtkmm.
gtkmm vs Each Alternative
| # | Tool | Free plan | Paid from | Open source | Score |
|---|---|---|---|---|---|
| 22 | gtkmm | Yes | Free | Yes | 7.1 |
| 1 | Flutter | Yes | Free | Yes | 9.3 |
| 2 | Electron | Yes | Free | Yes | 9.1 |
| 3 | .NET MAUI | Yes | Free | Yes | 9.0 |
| 4 | Qt Creator | Yes | €546/user/yr | Yes | 8.9 |
| 5 | Qt for Python | Yes | Yes | 8.8 | |
| 6 | Compose Multiplatform | Yes | Free | Yes | 8.7 |
| 7 | Windows Presentation Foundation (WPF) | Yes | Free | Yes | 8.6 |
| 8 | OpenJFX | Yes | Free | Yes | 8.5 |
| 9 | GTK | Yes | Free | Yes | 8.4 |
| 10 | Delphi | Yes | 8.3 | ||
| 11 | wxWidgets | Yes | Free | Yes | 8.2 |
| 12 | PyQt | Yes | Yes | 8.1 | |
| 13 | Lazarus | Yes | Free | Yes | 8.0 |
| 14 | Avalonia | Yes | €299/seat/yr | Yes | 7.9 |
| 15 | RAD Studio | No | No | 7.8 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update