# OpenSilver vs XAML.io

OpenSilver records 2,710 monthly visits with -31.6% month-over-month growth and Paid pricing. XAML.io records 7,096 monthly visits with -41.5% growth and Free pricing.

| Metric | [OpenSilver](https://openaitools.app/tool/opensilver) | [XAML.io](https://openaitools.app/tool/xaml-io) |
| :--- | :--- | :--- |
| Website URL | https://opensilver.net | https://xaml.io |
| Categories | AI App Builder, AI Design Assistant, AI Developer Tools, AI Website Builder | No-Code&Low-Code, AI App Builder, AI UX Design |
| Pricing Model | Paid | Free |
| Monthly Visits | 2,710 | 7,096 |
| MoM Growth Rate | -31.6% | -41.5% |
| Primary Market | United States | United States |
| Direct Visits | 1,065 | 2,854 |
| Review Score | 4.2 | 3.8 |
| Saved Count | 0 | 0 |
| Supported Platforms | Website | Website |

## OpenSilver

OpenSilver rebuilds the Microsoft Silverlight and WPF programming model on top of .NET and WebAssembly, so a codebase written in C#, VB or F# with XAML keeps working in Chrome, Firefox, Safari, Windows, macOS and Android. Teams that own a legacy Silverlight line-of-business application — or a Windows-only WPF desktop app — can move it to the browser while reusing over 95% of the original source, keeping screens visually identical so no user retraining or documentation rewrite is needed.

The framework ships with enterprise-oriented controls and library compatibility, including RIA Services and LightSwitch support, and the 3.3 release introduced an AI-enhanced drag-and-drop UI designer, the ability to host Blazor components directly inside XAML applications, and MAUI Hybrid integration. It also interoperates with Blazor, React and Angular when a team wants to mix stacks rather than migrate everything at once.

The core technology stack is free under the MIT license and can be downloaded as an SDK or tried instantly in the zero-setup XAML.io online IDE. For organizations that prefer not to run the migration themselves, Userware offers a commercial end-to-end migration service, support plans and pro services — which is where the paid side of the offering sits.

**Pricing & Plans:** The OpenSilver framework itself is free and open source under the MIT license, including the SDK and the online XAML.io IDE. Paid options come through Userware: commercial support plan subscriptions, pro services, and end-to-end WPF/Silverlight migration engagements quoted per project.

- **95%+ code reuse for legacy apps:** Recompile existing Silverlight or WPF C#, VB and F# code into a WebAssembly app that runs in any modern browser, avoiding a costly rewrite.
- **AI-enhanced visual designer:** OpenSilver 3.3 adds an AI-assisted drag-and-drop UI designer for building and editing XAML screens faster.
- **Blazor and MAUI interop:** Host Blazor components directly inside XAML applications and integrate with MAUI Hybrid, plus mix in React or Angular where useful.
- **Enterprise library compatibility:** Keeps support for RIA Services, LightSwitch and common third-party controls so established business apps keep working.
- **Zero-setup online IDE:** Try the framework immediately in the browser at XAML.io with no install and no signup, or download the SDK locally.

**Strengths:** Reuses the large majority of existing Silverlight/WPF code and preserves the pixel-level UI; Open-source MIT core with an installable SDK and a free in-browser IDE; Professional migration services and support plans available when you need them; Broad target coverage: all major browsers plus Windows, macOS and Android

**Limitations:** Targeted at teams with legacy .NET code rather than greenfield developers; Enterprise-grade migration and support are commercial and quoted per project; WebAssembly output can still be heavier than a hand-written modern front-end

[Profile (Markdown)](https://openaitools.app/tool/opensilver.md)

## XAML.io

XAML.io is an online workspace for building .NET applications without a local IDE installation. It brings three ways of working into a single project: an AI assistant that generates XAML and C# from descriptions, a code editor for writing XAML and C# directly, and a visual drag-and-drop designer for laying out interfaces. Because all three operate on the same project, you can sketch a screen visually, refine it in code, and use AI to fill in repetitive markup.

The platform is built around XAML, the markup language used across WPF, MAUI, and related .NET UI frameworks, and it sits in the lineage of tools like OpenSilver that keep XAML-based development alive on the web. That makes it useful for developers who want to prototype a .NET interface quickly, port an existing XAML idea into the browser, or explore UI ideas before committing to a full desktop toolchain.

Projects built on XAML.io can be published to Web and Desktop, and — importantly — the same project can be opened in Visual Studio. The site markets itself as free, with no setup and no lock-in, so it works as a low-friction starting point rather than a walled garden. XAML.io is an independent product and is not affiliated with Microsoft; framework names such as XAML, WPF, .NET, and Visual Studio are referenced only to describe compatibility. Verify current publishing targets and feature details on the site, as a browser-based tool of this kind evolves quickly.

**Pricing & Plans:** Free. The site states the platform is free to use with no setup and no lock-in, and the same project can be opened in Visual Studio.

- **AI-assisted XAML generation:** Describe the UI or component you want and let the built-in assistant generate the corresponding XAML and C#, then adjust the result by hand.
- **Direct C# and XAML editing:** Write and edit C# and XAML directly in the browser with immediate feedback, so you are never limited to what a visual designer exposes.
- **Visual drag-and-drop designer:** Drag, drop, and arrange controls in a WYSIWYG surface to lay out windows and views, then jump into code for the details.
- **Publish to Web and Desktop:** Take a project from prototype to a published Web or Desktop build, and open the same project in Visual Studio when you want a local toolchain.
- **No setup, no lock-in:** No install and no vendor lock-in: the same project files move with you between the browser environment and desktop tooling.

**Strengths:** Runs entirely in the browser with no installation; Combines AI generation, hand-written C#/XAML, and a visual designer in one project; Publishes to Web and Desktop, and projects open in Visual Studio; Described as free with no lock-in

[Profile (Markdown)](https://openaitools.app/tool/xaml-io.md)

## Frequently Asked Questions

### How do OpenSilver and XAML.io compare in monthly traffic?

OpenSilver has 2,710 monthly visits, while XAML.io has 7,096. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

OpenSilver has a month-over-month growth rate of -31.6%; XAML.io has -41.5%.

### How does pricing compare?

OpenSilver: Paid. The OpenSilver framework itself is free and open source under the MIT license, including the SDK and the online XAML.io IDE. Paid options come through Userware: commercial support plan subscriptions, pro services, and end-to-end WPF/Silverlight migration engagements quoted per project. XAML.io: Free. Free. The site states the platform is free to use with no setup and no lock-in, and the same project can be opened in Visual Studio.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Lovable](https://openaitools.app/tool/lovable) | 31,052,090 | +3.8% | Freemium | Describe your idea in chat and Lovable turns it into a working app or website | [.md](https://openaitools.app/tool/lovable.md) |
| 2 | [Base44](https://openaitools.app/tool/base44) | 14,039,232 | +0.5% | Freemium, Paid, Contact for Pricing | Build working apps, websites, and AI agents by describing them | [.md](https://openaitools.app/tool/base44.md) |
| 3 | [Emergent](https://openaitools.app/tool/emergent) | 5,788,850 | +5% | Freemium | Describe an app in chat and ship it | [.md](https://openaitools.app/tool/emergent.md) |
| 4 | [Bolt.new](https://openaitools.app/tool/bolt-new) | 3,033,976 | -17.8% | Freemium | Build websites and apps by chatting with AI in your browser | [.md](https://openaitools.app/tool/bolt-new.md) |
| 5 | [MindStudio](https://openaitools.app/tool/mindstudio) | 1,793,337 | +14.2% | Contact for Pricing | No-code builder for custom AI agents and workflows | [.md](https://openaitools.app/tool/mindstudio.md) |
| 6 | [Builder.io](https://openaitools.app/tool/builder-io) | 608,182 | +3.6% | Freemium, Subscription, Contact for Pricing | Ship on-brand product experiences with your team and AI agents | [.md](https://openaitools.app/tool/builder-io.md) |
| 7 | [Adalo](https://openaitools.app/tool/adalo) | 379,914 | +7.5% | Freemium | AI no-code builder that turns one sentence into native iOS, Android, and web apps | [.md](https://openaitools.app/tool/adalo.md) |
| 8 | [WeWeb](https://openaitools.app/tool/weweb) | 329,952 | +0.8% | Freemium, Paid | AI app builder with visual editing and full code export | [.md](https://openaitools.app/tool/weweb.md) |
| 9 | [Anima](https://openaitools.app/tool/anima) | 283,307 | -5.8% | Freemium | Design-aware AI agent that turns Figma files, URLs, and prompts into live apps | [.md](https://openaitools.app/tool/anima.md) |
| 10 | [NxCode](https://openaitools.app/tool/nxcode) | 227,078 | -16% | Freemium | Describe your idea in plain English and let AI build, test, and deploy your app | [.md](https://openaitools.app/tool/nxcode.md) |

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Source: https://openaitools.app/compare/opensilver-vs-xaml-io

More Markdown: [Categories](https://openaitools.app/categories.md) · [Traffic rankings](https://openaitools.app/rankings.md) · [llms.txt](https://openaitools.app/llms.txt)