Lego Alternatives

Apps similar to Lego include Vue.js, which is free and open source. Other options are Angular, React, Svelte and Vite. You're spoiled for choice with JavaScript Frameworks like Lego: we list more than 25 alternatives for Windows, Linux, self-hosting, Mac and the web.

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Lego alternatives page was last updated May 12, 2025

slim.js
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Lightning fast web authoring library targeted at creating web components with data binding, repeaters and more features. http://slimjs.com.
Cost / License
Free
Open Source (MIT)
Origin
Israel
Platforms
Mac
Windows
Linux
Good alternative?Is slim.js a good alternative to Lego?
Marko
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Marko is a modern, progressive UI library built and used by eBay for fast and friendly web development. It provides an elegant and readable syntax for both single-file components and components broken into separate files and includes a bunch of...
Cost / License
Free
Open Source (MIT)
Origin
United States
Platforms
Self-Hosted
Good alternative?Is Marko a good alternative to Lego?
Aberdeen
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A TypeScript/JavaScript library for quickly building performant declarative user interfaces without the use of a virtual DOM.
Cost / License
Free
Open Source (ISC)
Platforms
JavaScript
Typescript
Self-Hosted
Good alternative?Is Aberdeen a good alternative to Lego?
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Sycamore
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Lightning Speed: Sycamore harnesses the full power of Rust via WebAssembly, giving you full control over performance.

Cost / License
Free
Open Source (MIT)
Platforms
Online
S
Good alternative?Is Sycamore a good alternative to Lego?
CxJS
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With more than 80 UI components, including advanced tables, charts, and forms, this open-source JavaScript framework will help you build complex, data-rich web applications faster and more efficiently.
Cost / License
Free
Open Source (MIT)
Application type
JavaScript Framework
Origin
Bosnia & Herzegovina
Platforms
Self-Hosted
Good alternative?Is CxJS a good alternative to Lego?
Rax
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Rax is a universal JavaScript library built and used by Alibaba.com that has a largely React compatible API.
Cost / License
Free
Open Source
Origin
China
Platforms
Self-Hosted
Good alternative?Is Rax a good alternative to Lego?