When comparing Sciter vs Fyne, the Slant community recommends Sciter for most people. In the question“What are the best cross-platform GUI toolkits?” Sciter is ranked 19th while Fyne is ranked 24th. The most important reason people chose Sciter is:
Support for C++, C#, Delphi, D, Go, Rust, Powerbuilder. See [Go bindings on GitHub](https://github.com/sciter-sdk/go-sciter). The binding for C# on GitHub, [SciterSharp](https://github.com/ramon-mendes/SciterSharp) does not seem to be free: in a commercial product you should acquire a commercial license.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Multi language
Support for C++, C#, Delphi, D, Go, Rust, Powerbuilder. See Go bindings on GitHub. The binding for C# on GitHub, SciterSharp does not seem to be free: in a commercial product you should acquire a commercial license.
Pro Lightweight
Only a single native DLL.
Pro Mobile support
Android and iOS are supported.
Pro Easy to learn
Simple and consistent API.
Pro Permissively licensed
Fyne is licensed under the 3-clause BSD license, which has fairly lax restrictions on usage.
Cons
Con Linux version is not very mature
The Linux version is missing HTML/CSS features when compared to the Windows version.
Con Not fully HTML5 compliant
Lacking HTML5 functionality and W3C standards: grabbing a library like JQuery or Bootstrap and use it in Sciter will not work.
Con Not WYSIWYG
Not WYSIWYG like WebForms or WPF.
Con Go specific
Fyne is only usable in Go applications.