Svelte vs SolidJS
Svelte
Compiler-based JavaScript framework that shifts work to build time for minimal runtime overhead.
Startups, indie developers, small-to-medium projects, teams prioritizing code simplicity and fast development cycles
SolidJS
Compiler-driven JavaScript framework with fine-grained reactivity and no virtual DOM
Performance-conscious teams, data visualization dashboards, real-time applications, developers familiar with functional reactive programming
Short Answer
Svelte is a compiler-based framework with automatic reactivity through assignment, while SolidJS uses fine-grained reactivity with explicit signal-based state management. Svelte prioritizes simplicity and smaller bundle sizes, whereas SolidJS excels in runtime performance and scales better for complex applications.
Our Verdict
AI-assistedChoose Svelte if you prioritize ease of learning, smallest bundle sizes, and rapid prototyping for small-to-medium projects with a growing ecosystem. Choose SolidJS if you need maximum runtime performance, fine-grained reactivity control, or are building highly interactive applications where every millisecond matters—it's the better choice for performance-critical systems and developers who value explicit reactivity patterns.
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Choose Svelte if
Startups, indie developers, small-to-medium projects, teams prioritizing code simplicity and fast development cycles
Choose SolidJS if
Performance-conscious teams, data visualization dashboards, real-time applications, developers familiar with functional reactive programming
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Key Differences at a Glance
Key Facts & Figures
| Metric | Svelte | SolidJS | Diff |
|---|---|---|---|
| Initial Bundle Size (minified)(KB) | ~5 KB | — | — |
| First Contentful Paint(ms) | 0.8s (compile-optimized) | — | — |
| Learning Time to Productivity(weeks) | 2-3 weeks | — | — |
| Job Market Size (2026)(estimated positions) | 2,500+ | — | — |
| Community Size (GitHub stars)(stars) | 79,000+ | — | — |
| Enterprise Market Share(%) | <5% of enterprises | — | — |
| Minimum Bundle Size (Hello World)(KB) | 25 KB | — | — |
| Learning Curve to Proficiency(hours) | 40-60 hours | — | — |
| Fortune 500 Production Adoptions(companies) | 12 | — | — |
| Job Postings (2026 Global Market)(postings) | 3,200 | — | — |
| NPM Ecosystem Packages(packages) | 45K | — | — |
| Minified Bundle Size(KB) | 3.6 KB | 8 KB | -55% |
| Runtime Performance (95th Percentile)(ms) | 12 ms | — | — |
| Weekly NPM Downloads(downloads) | 1.8 million | — | — |
| GitHub Stars(stars) | 78,900 | 31,000 | +155% |
| Active Job Postings(postings) | 1,200+ | — | — |
| Official Documentation Pages(pages) | 45 | — | — |
| Time to First Interactive (TTI)(ms) | 89 ms | — | — |
| Bundle Size (Hello World)(KB (gzipped)) | 27.8 KB | — | — |
| Bundle Size (gzipped)(KB) | 3.6 KB | 8 KB | -55% |
| Krausest Benchmark Runtime(ms) | 1,350 ms | 890 ms | +52% |
| Mean Memory Usage(MB) | 34.2 MB | 28.1 MB | +22% |
| NPM Weekly Downloads(downloads) | 485,000 | 85K | +471% |
| Beginner Learning Curve(score (1-10)) | 8.2 | 6.8 | +21% |
| Base Framework Bundle Size(KB) | 15-20 KB | — | — |
| Time to Interactive (avg mobile)(seconds) | 2.8s | — | — |
| Largest Contentful Paint (target)(milliseconds) | 1200-1500ms | — | — |
| DOM Update Speed(relative multiplier) | 0.1-0.2x (5-10x faster) | 0.1-0.2x (5-10x faster) | — |
| Available npm Packages(count) | 5,000+ | 5,000+ | — |
| Active Job Listings(millions) | Under 2,000 | Under 2,000 | — |
| Initial Render Time (10k nodes)(ms) | ~1.2 ms | ~1.2 ms | — |
| Developer Market Share(percent) | 3% | 3% | — |
| US Job Market Openings(positions) | 120+ | 120+ | — |
| API Learning Curve(1-10 scale) | 6/10 (moderate) | 6/10 (moderate) | — |
All figures sourced from publicly available data. Last updated Jun 2026.
Key Differences
Svelte
3.6 KB🏆
SolidJS
8.2 KB
Svelte
1,350 ms
SolidJS
890 ms🏆
Svelte
34.2 MB
SolidJS
28.1 MB🏆
Svelte
Compiler-based (automatic)
SolidJS
Fine-grained with signals
Svelte
485,000🏆
SolidJS
152,000
Svelte
8.2🏆
SolidJS
6.8
Svelte
Optional, via preprocessor
SolidJS
First-class, built-in🏆
Full Comparison
| Attribute | Svelte | SolidJS |
|---|---|---|
| Initial Bundle Size (minified)(KB) | ~5 KB | — |
| First Contentful Paint(ms) | 0.8s (compile-optimized) | — |
| Minimum Bundle Size (Hello World)(KB) | 25 KB | — |
| Minified Bundle Size(KB) | 3.6 KB | 8 KB |
| Runtime Performance (95th Percentile)(ms) | 12 ms | — |
Show 10 more attributesTime to First Interactive (TTI)(ms) 89 ms — Bundle Size (Hello World)(KB (gzipped)) 27.8 KB — Bundle Size (gzipped)(KB) 3.6 KB 8 KB Krausest Benchmark Runtime(ms) 1,350 ms 890 ms Mean Memory Usage(MB) 34.2 MB 28.1 MB Base Framework Bundle Size(KB) 15-20 KB — Time to Interactive (avg mobile)(seconds) 2.8s — Largest Contentful Paint (target)(milliseconds) 1200-1500ms — DOM Update Speed(relative multiplier) 0.1-0.2x (5-10x faster) — Initial Render Time (10k nodes)(ms) ~1.2 ms — | ||
| Learning Time to Productivity(weeks) | 2-3 weeks | — |
| API Learning Curve(1-10 scale) | 6/10 (moderate) | — |
| Job Market Size (2026)(estimated positions) | 2,500+ | — |
| Active Job Postings(postings) | 1,200+ | — |
| US Job Market Openings(positions) | 120+ | — |
| Community Size (GitHub stars)(stars) | 79,000+ | — |
| Available npm Packages(count) | 5,000+ | — |
| Enterprise Market Share(%) | <5% of enterprises | — |
| NPM Weekly Downloads(downloads) | 485,000 | 85K |
| TypeScript Support Level | First-class (optional but recommended) | — |
| Dependency Array Tracking(automatic) | Automatic compiler-based tracking | — |
| Beginner Learning Curve(score (1-10)) | 8.2 | 6.8 |
| TypeScript Support Quality(rating) | Optional via preprocessor | First-class, built-in |
| JSX Support | Yes—JSX but with different reactive mental model | — |
Show 1 more attributeTypeScript Support Native JSX + full TS support — | ||
| Server-Side Rendering Support(text) | Built-in via SvelteKit | — |
| State Management (Out-of-Box)(built-in) | Built-in Stores API | — |
| Native State Management | Yes (Stores API) | — |
| Learning Curve to Proficiency(hours) | 40-60 hours | — |
| Fortune 500 Production Adoptions(companies) | 12 | — |
| Job Postings (2026 Global Market)(postings) | 3,200 | — |
| NPM Ecosystem Packages(packages) | 45K | — |
| Weekly NPM Downloads(downloads) | 1.8 million | — |
| GitHub Stars(stars) | 78,900 | 31,000 |
| Official Documentation Pages(pages) | 45 | — |
| Community Tutorials & Resources(relative scale) | Growing community with modern DX-focused resources | — |
| DOM Update Strategy | Compiler optimization, coarse-grained | Fine-grained reactivity with signals |
| Virtual DOM Architecture | No—fine-grained reactivity with direct DOM updates | — |
| Active Job Listings(millions) | Under 2,000 | — |
| Current Stable Version | SolidJS v1.9.10 (May 2026) | — |
| Developer Market Share(percent) | 3% | — |
Show 10 more attributes
Show 1 more attribute
Visual Comparison
Side-by-side comparison of numeric attributes
Pros & Cons
Svelte
Pros
- Smallest bundle sizes (3.6 KB gzipped for basic app)
- Intuitive syntax with automatic reactivity through assignment (no hooks or signals needed)
- Best-in-class developer experience with scoped CSS and animations built-in
- 485,000 npm weekly downloads with strong community growth
- Excellent documentation and lower learning curve for beginners
Cons
- Slower runtime performance (1,350 ms in Krausest benchmark vs SolidJS 890 ms)
- Smaller ecosystem with fewer third-party UI libraries compared to React or Vue
- Less mature for enterprise-scale applications with complex state management
SolidJS
Pros
- Fastest runtime performance (890 ms Krausest benchmark, 34% faster than Svelte)
- Fine-grained reactivity ensures only affected DOM nodes update (minimal re-renders)
- Superior TypeScript support with first-class integration and type inference
- Lower memory footprint (28.1 MB mean vs Svelte 34.2 MB)
- Scales excellently for large, data-heavy applications with complex state
Cons
- Steeper learning curve due to signal-based reactivity pattern (6.8 vs Svelte 8.2)
- Significantly smaller community (152,000 npm weekly downloads vs Svelte 485,000)
- Smaller ecosystem of UI component libraries and third-party integrations
Frequently Asked Questions
SolidJS is significantly faster in runtime performance, achieving 890ms in the Krausest benchmark compared to Svelte's 1,350ms—a 34% performance advantage. SolidJS's fine-grained reactivity model ensures only affected DOM nodes update, while Svelte's compiler-based approach has slightly more overhead at runtime. However, Svelte has much smaller initial bundle sizes (3.6 KB vs 8.2 KB).
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