FlaUI
FlaUI: A focused, free .NET library for automating Windows desktop GUI tests in code. Ranked #33 of 37 in GUI Testing Software by our editors (6.0/10); pricing: Free plan; best for windows desktop GUI automation.
At a glance
- Editor score6.0 / 10
- PricingFree plan
- Best forWindows desktop GUI automation
- Free planYes
- Paid fromFree
- Supported targetsDesktop
- Facts checked21 Sep 2026
Where it wins
- Covers Win32, WinForms, WPF, and Windows Store applications
- Supports UIA2 and UIA3 automation implementations
- Includes discovery, waits, screenshots, video, and control interaction
Where it doesn't
- Windows-only, with no cross-platform application coverage
- Requires developers to author tests in code
- Focused on desktop GUI automation rather than broader testing needs
Our verdict on FlaUI
FlaUI is an open-source .NET UI automation library for developers testing Windows desktop applications. It supports Win32, WinForms, WPF, and Windows Store applications, making it suited to teams that need code-driven GUI automation across several Windows application frameworks. Developers can install its assemblies through NuGet or build the source, then launch or attach to applications, discover automation elements, and interact with controls programmatically. The library is designed for developer-authored tests rather than codeless test creation.
Its strongest fit is the depth of its Windows desktop automation coverage. FlaUI wraps Microsoft’s native UI Automation APIs and provides both UIA2 and UIA3 implementations. Test code can work with automation elements, mouse and keyboard input, application lifecycle helpers, retry and wait behavior, screenshots, test-result screenshots, and video recording. Those capabilities support workflows that need more than basic control interaction, particularly when test evidence or timing handling is important. The published licensing model is also straightforward: FlaUI is distributed under the MIT License and has a free, open-source model rather than paid tiers.
The trade-off is focus. FlaUI runs on Windows and targets desktop applications, so it is a narrower choice for teams seeking one GUI automation approach across multiple operating systems or broader application types. It also places test authoring in developers’ hands, with no codeless workflow described. Choose FlaUI when Windows desktop automation, .NET code, UIA2/UIA3 support, and source-level control are priorities. Consider an alternative when cross-platform coverage, visual test authoring, or a wider testing scope matters more than focused Windows GUI automation.
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FlaUI pricing
FlaUI fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Supported targets | Desktop |
| Codeless authoring | Not verified |
| Visual validation | Not verified |
| Cross-browser testing | Not verified |
| Parallel execution | Not verified |
| Mobile app testing | Not verified |
| Deployment | Desktop |
| Platforms | Windows |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 21 Sep 2026 |
Alternatives to FlaUI
- PlaywrightA free, open-source choice for code-first teams testing across browser engines and devices.9.4
- SeleniumA mature, flexible choice for teams building standard web automation in code.9.2
- AppiumBroad, code-first UI automation for teams spanning mobile and multiple platforms.9.0
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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