FlaUI
FlaUI is a free .NET library for automating tests of Windows desktop applications, including Win32, WinForms, WPF, and Store Apps.
What FlaUI is
FlaUI is a free .NET library for automating tests of Windows desktop applications, including Win32, WinForms, WPF, and Store Apps. It wraps Microsoft’s native UI Automation libraries while exposing native objects when its wrappers do not cover a case. Developers choose between UIA2 and UIA3, search application interfaces for automation elements, and interact with those elements. A helper class can launch, attach to, or close applications. The project is distributed under the MIT License, allowing use, modification, distribution, and sale under its conditions. The maker provides UIA2 and UIA3 assemblies through NuGet, with source download and compilation as another option. The README distinguishes the automation choices: UIA2 lacks newer capabilities such as touch and does not work well with WPF or Windows Store Apps, while UIA3 can have bugs in WinForms applications that UIA2 avoids. Questions can go to a Gitter chat, and GitHub handles issue reports and pull requests. The MIT license provides the software as-is and disclaims warranties and liability.
Good
- Free MIT-licensed .NET library
- Supports Win32, WinForms, WPF, and Store Apps
- Choice of UIA2 or UIA3
- Helpers launch, attach to, and close applications
- Available through NuGet
Watch out
- UIA2 lacks newer features such as touch
- UIA2 works poorly with WPF and Store Apps
- UIA3 may have WinForms bugs
- MIT license disclaims warranties and liability
Who it suits
It is intended for developers automating tests of Windows desktop applications. It fits projects using .NET and applications built with Win32, WinForms, WPF, or Store Apps.
Verdict
FlaUI provides Windows UI automation building blocks with two Microsoft UI Automation options and broad desktop framework coverage. Developers should select UIA2 or UIA3 with their documented compatibility limits in mind.
Plans and prices
From FlaUI's own pricing page, checked 4 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| FlaUI | Free | MIT-licensed .NET UI automation library · UIA2 and UIA3 NuGet packages |
The facts
Each one read from FlaUI's own pages, with the date it was checked.
Where it runs
- Application control
- Its helper class can launch, attach to, or close applications.checked 4 Oct 2026
What it does
- Automation choices
- The library lets developers choose between UIA2 and UIA3.checked 4 Oct 2026
- Distribution
- The maker directs users to install the appropriate UIA2 or UIA3 assembly from NuGet, or download and compile the source.checked 4 Oct 2026
- Element interaction
- Users can search an application’s UI elements and interact with them through automation elements.checked 4 Oct 2026
- Intended users
- The README describes FlaUI as a library for developers who automate tests of Windows desktop applications.checked 4 Oct 2026
- License
- The project is distributed under the MIT License, which permits use, modification, distribution and sale subject to its stated conditions.checked 4 Oct 2026
- Purpose
- FlaUI is a .NET library for automated UI testing of Windows applications, including Win32, WinForms, WPF and Store Apps.checked 4 Oct 2026
- Security and warranty
- The MIT license provides the software “as is” and disclaims warranties and liability.checked 4 Oct 2026
- Support
- The README points users to a Gitter chat for questions and invites issue reports and pull requests through GitHub.checked 4 Oct 2026
- UIA2 limitation
- The README says UIA2 does not support newer features such as touch and does not work well with WPF or Windows Store Apps.checked 4 Oct 2026
- UIA3 limitation
- The README says UIA3 can have bugs with WinForms applications that are not present in UIA2.checked 4 Oct 2026
- Underlying technology
- It wraps Microsoft’s native UI Automation libraries and exposes native objects for cases its wrappers do not cover.checked 4 Oct 2026
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