# React vs Svelte

| Attribute | React | Svelte |
|---|---|---|
| **Vioscale score** | 79.5 (73% (medium)) | 78.3 (71% (medium)) |
| activity.commits_last_30d | 53 | 87 |
| adoption.dependent_repos | 324,856 | 56,439 |
| adoption.github_stars | 247,901 | 87,991 |
| adoption.package_downloads_weekly | 173,063,703 | 5,781,541 |
| adoption.stackoverflow_questions | 470,000 | 9,000 |
| content.faq | `[{"answer":"React is a JavaScript library for building user interfaces using a component-based architecture. It uses a declarative programming model, allowing developers to describe what the UI should look like for any given application state. React employs a virtual DOM abstraction to efficiently update only the parts of the interface that have changed.","source":"https://github.com/facebook/react","question":"What is React?","confidence":0.95},{"answer":"Yes, React is open source software released under the MIT license, permitting free use, modification, and distribution in both commercial and personal projects. There are no licensing fees or cost barriers to using React.","source":"https://github.com/facebook/react","question":"Is React open source and free to use?","confidence":0.95},{"answer":"React is maintained by Meta (formerly Facebook) along with contributions from the open-source community. Meta created React to solve its own internal UI challenges and later open-sourced it to enable broader adoption and community feedback.","source":"https://github.com/facebook/react","question":"Who maintains React?","confidence":0.94},{"answer":"React is built on JavaScript and TypeScript, running natively in web browsers. Meta also maintains React Native, a separate framework that allows developers to apply React principles to build native iOS and Android mobile applications using JavaScript.","source":"https://github.com/facebook/react","question":"What programming languages and platforms does React support?","confidence":0.95},{"answer":"Popular alternatives include Vue.js (a progressive JavaScript framework), Angular (a comprehensive full-featured framework), Svelte (a compiler-based framework), and Preact (a lightweight React-compatible library). Each offers different trade-offs in learning curve, ecosystem size, and performance characteristics.","source":"https://github.com/facebook/react","question":"What are the main alternatives to React?","confidence":0.93},{"answer":"React applications can use multiple rendering strategies: client-side rendering (browser handles all rendering), server-side rendering (server generates initial HTML via Node.js), or static site generation (pre-built HTML files). Deployments typically run on web servers, content delivery networks, or serverless computing platforms.","source":"https://github.com/facebook/react","question":"How are React applications typically deployed?","confidence":0.94},{"answer":"React projects typically use build tools such as Webpack, Vite, or Parcel for bundling and development. Common complementary libraries include React Router for navigation, Redux or Context API for state management, and Jest or React Testing Library for testing.","source":"https://github.com/facebook/react","question":"What build tools and libraries are commonly paired with React?","confidence":0.93}]` | `[{"answer":"Svelte is an open-source UI framework that uses a compiler to convert declarative component code into efficient vanilla JavaScript that runs in the browser. Rather than shipping a runtime framework to users, Svelte moves the heavy lifting to build time, resulting in minimal, optimized code that surgically updates the DOM. This compiler-first approach produces smaller bundle sizes and better runtime performance compared to traditional runtime-based frameworks.","source":"https://svelte.dev","question":"What is Svelte and how does it work?","confidence":0.95},{"answer":"Yes, Svelte is a free, open-source project released under the MIT license. It is maintained by Vercel and a community of volunteer contributors, with no licensing fees, paid tiers, or commercial restrictions. Anyone can use, modify, and distribute Svelte for any project.","source":"https://github.com/sveltejs/svelte","question":"Is Svelte free and open source?","confidence":0.98},{"answer":"Svelte uses standard web technologies: HTML for structure, CSS for styling, and JavaScript for interactivity. Developers write components using these familiar languages without needing to learn a specialized syntax or framework-specific language extensions. TypeScript support is also available for developers who prefer static typing.","source":"https://svelte.dev","question":"What languages and technologies does Svelte use?","confidence":0.95},{"answer":"SvelteKit is a full-stack framework built on top of Svelte that handles routing, server-side rendering, static site generation, and deployment configuration. Use SvelteKit when building complete web applications that need server-side functionality, form handling, and data management; use standalone Svelte when building individual components or component libraries.","source":"https://svelte.dev","question":"What is SvelteKit and when should I use it?","confidence":0.93},{"answer":"Yes, Svelte receives consistent maintenance and updates from its development team and community. The project publishes monthly releases documenting new features across Svelte, SvelteKit, and related tooling, with recent focus on developer experience, TypeScript integration, async functionality, and tooling improvements.","source":"https://svelte.dev/blog","question":"Does Svelte have active development and regular updates?","confidence":0.92},{"answer":"Svelte consistently ranks highly in developer satisfaction surveys, including top positions in Stack Overflow and State of JavaScript surveys. It is praised for its approachable design and powerful capabilities, attracting developers across skill levels. The framework has a growing community supported by Svelte Society events and an active Discord channel.","source":"https://svelte.dev","question":"How popular is Svelte among developers?","confidence":0.9},{"answer":"Svelte's compile-time approach produces significantly smaller JavaScript bundle sizes compared to frameworks that ship runtime code to the browser. The compiler generates only the code needed for your specific components, resulting in faster initial page loads, better runtime performance, and reduced bandwidth consumption, particularly beneficial for users on slower connections or older devices.","source":"https://svelte.dev","question":"What are the main performance benefits of using Svelte?","confidence":0.92},{"answer":"SvelteKit includes adapters for major hosting platforms including Vercel, Netlify, AWS, and Node.js-based servers, allowing deployment as serverless functions or traditional server applications. Standalone Svelte components can be deployed anywhere JavaScript runs. The flexible adapter system enables deployment to virtually any modern hosting platform.","source":"https://svelte.dev","question":"What deployment and hosting options does Svelte support?","confidence":0.88}]` |
| description.long | A library that enables developers to construct user interfaces using individual components as building blocks. React components are JavaScript functions that receive data and render the appropriate output, supporting both web applications and native mobile development through frameworks. | A framework with an integrated compiler that lets developers create streamlined components using standard HTML, CSS, and JavaScript, minimizing runtime overhead in the browser. |
| features.capabilities | `{"paradigm":"Component-based library","ssr_support":true,"component_model":true}` | `{"paradigm":"compiler-based component framework","bundle_size":"small","ssr_support":true,"virtual_dom":false,"component_model":true,"state_management":true,"typescript_first":false,"signals_reactivity":true}` |
| language.primary | JavaScript | JavaScript |
| license.spdx | MIT | MIT |
| market.availability | `{"source":"https://react.dev","hqCountry":"US","confidence":0.95,"primaryMarkets":["US"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"source":"https://svelte.dev","confidence":0.95,"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"web":true}` |
| pricing | `{"type":"open_source","sourceUrl":"https://react.dev","retrievedAt":"2026-08-01T15:00:26.727Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://svelte.dev","retrievedAt":"2026-08-14T15:28:27.792Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| release.cadence_days | 60 | 3 |
| release.history | `[{"url":"https://github.com/react/react/releases/tag/v19.2.8","date":"2026-07-21T15:49:09Z","type":"stable","version":"v19.2.8"},{"url":"https://github.com/react/react/releases/tag/v19.1.9","date":"2026-07-21T15:48:51Z","type":"stable","version":"v19.1.9"},{"url":"https://github.com/react/react/releases/tag/v19.0.8","date":"2026-07-21T15:48:28Z","type":"stable","version":"v19.0.8"},{"url":"https://github.com/react/react/releases/tag/v19.2.7","date":"2026-06-01T18:04:24Z","type":"stable","version":"v19.2.7"},{"url":"https://github.com/react/react/releases/tag/v19.1.8","date":"2026-06-01T18:04:14Z","type":"stable","version":"v19.1.8"},{"url":"https://github.com/react/react/releases/tag/v19.0.7","date":"2026-06-01T18:04:09Z","type":"stable","version":"v19.0.7"},{"url":"https://github.com/react/react/releases/tag/v19.2.6","date":"2026-05-06T16:27:45Z","type":"stable","version":"v19.2.6"},{"url":"https://github.com/react/react/releases/tag/v19.1.7","date":"2026-05-06T16:27:39Z","type":"stable","version":"v19.1.7"},{"url":"https://github.com/react/react/releases/tag/v19.0.6","date":"2026-05-06T16:27:36Z","type":"stable","version":"v19.0.6"},{"url":"https://github.com/react/react/releases/tag/eslint-plugin-react-hooks%407.1.1","date":"2026-04-17T20:51:48Z","type":"stable","version":"eslint-plugin-react-hooks@7.1.1"},{"url":"https://github.com/react/react/releases/tag/eslint-plugin-react-hooks%407.1.0","date":"2026-04-17T19:41:40Z","type":"stable","version":"eslint-plugin-react-hooks@7.1.0"},{"url":"https://github.com/react/react/releases/tag/v19.2.5","date":"2026-04-08T18:49:20Z","type":"stable","version":"v19.2.5"},{"url":"https://github.com/react/react/releases/tag/v19.1.6","date":"2026-04-08T18:49:16Z","type":"stable","version":"v19.1.6"},{"url":"https://github.com/react/react/releases/tag/v19.0.5","date":"2026-04-08T18:49:11Z","type":"stable","version":"v19.0.5"},{"url":"https://github.com/react/react/releases/tag/v19.2.4","date":"2026-01-26T18:29:43Z","type":"stable","version":"v19.2.4"},{"url":"https://github.com/react/react/releases/tag/v19.1.5","date":"2026-01-26T18:29:34Z","type":"stable","version":"v19.1.5"},{"url":"https://github.com/react/react/releases/tag/v19.0.4","date":"2026-01-26T18:29:19Z","type":"stable","version":"v19.0.4"},{"url":"https://github.com/react/react/releases/tag/v19.1.4","date":"2025-12-12T00:11:45Z","type":"stable","version":"v19.1.4"},{"url":"https://github.com/react/react/releases/tag/v19.0.3","date":"2025-12-12T00:12:32Z","type":"stable","version":"v19.0.3"},{"url":"https://github.com/react/react/releases/tag/v19.2.3","date":"2025-12-11T23:57:59Z","type":"stable","version":"v19.2.3"}]` | `[{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.10","date":"2026-08-20T19:20:58Z","type":"stable","version":"svelte@5.56.10"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.9","date":"2026-08-12T18:12:41Z","type":"stable","version":"svelte@5.56.9"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.8","date":"2026-07-24T22:09:14Z","type":"stable","version":"svelte@5.56.8"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.7","date":"2026-07-20T19:31:02Z","type":"stable","version":"svelte@5.56.7"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.6","date":"2026-07-16T22:26:47Z","type":"stable","version":"svelte@5.56.6"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.5","date":"2026-07-14T12:03:32Z","type":"stable","version":"svelte@5.56.5"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.4","date":"2026-06-23T18:48:43Z","type":"stable","version":"svelte@5.56.4"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.3","date":"2026-06-07T18:30:29Z","type":"stable","version":"svelte@5.56.3"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.2","date":"2026-06-04T20:33:04Z","type":"stable","version":"svelte@5.56.2"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.1","date":"2026-06-01T22:42:27Z","type":"stable","version":"svelte@5.56.1"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.56.0","date":"2026-05-29T22:00:29Z","type":"stable","version":"svelte@5.56.0"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.10","date":"2026-05-27T21:48:44Z","type":"stable","version":"svelte@5.55.10"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.9","date":"2026-05-20T10:08:35Z","type":"stable","version":"svelte@5.55.9"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.8","date":"2026-05-18T16:45:32Z","type":"stable","version":"svelte@5.55.8"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.7","date":"2026-05-14T19:07:37Z","type":"stable","version":"svelte@5.55.7"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.6","date":"2026-05-14T18:04:38Z","type":"stable","version":"svelte@5.55.6"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.5","date":"2026-04-23T23:48:48Z","type":"stable","version":"svelte@5.55.5"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.4","date":"2026-04-14T13:26:32Z","type":"stable","version":"svelte@5.55.4"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.3","date":"2026-04-10T13:24:09Z","type":"stable","version":"svelte@5.55.3"},{"url":"https://github.com/sveltejs/svelte/releases/tag/svelte%405.55.2","date":"2026-04-07T19:53:53Z","type":"stable","version":"svelte@5.55.2"}]` |
| security.disclosure_policy | - | yes |
| security.scorecard | 7 | 7.9 |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=react-devtools-core&per_page=100","last_12m":0,"max_severity":"MODERATE"}` | `{"count":14,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=svelte&per_page=100","last_12m":12,"max_severity":"HIGH"}` |

## Capabilities (Frontend UI Frameworks)

| Capability | React | Svelte |
|---|:--:|:--:|
| **Core** |  |  |
| Paradigm | Component-based library | compiler-based component framework |
| Reusable component model | ✓ | ✓ |
| **Rendering** |  |  |
| Virtual DOM | - | ✗ |
| Signals / fine-grained reactivity | - | ✓ |
| SSR support | ✓ | ✓ |
| **DX** |  |  |
| First-class TypeScript | - | ✗ |
| **State** |  |  |
| Built-in state management | - | ✓ |
| **Ecosystem** |  |  |
| Official router | - | - |
| **Performance** |  |  |
| Runtime size | - | Small (10–40kb) |

*Source: Vioscale. Generated 2026-09-01T17:29:37.634Z. "-" = undocumented, not absent.*