Head-to-Head Comparison
Deno vs Bun: Alternative JavaScript Runtimes
Deno focuses on security and web standards. Bun prioritises speed and Node compatibility. Deno for security, Bun for performance.
deno
bun
Last updated: 2025-01
Side-by-Side Comparison
| Category | deno | bun |
|---|---|---|
| Best For | Security-first | Speed-first |
| Learning Curve | Easy | Easy |
| Speed | Fast | Fastest |
| Node Compat | Improving | Excellent |
| Security | Excellent | Standard |
| TypeScript | Native | Native |
| Package Manager | URL imports | Built-in |
deno
- Best For
- Security-first
- Learning Curve
- Easy
- Speed
- Fast
- Node Compat
- Improving
- Security
- Excellent
- TypeScript
- Native
- Package Manager
- URL imports
bun
- Best For
- Speed-first
- Learning Curve
- Easy
- Speed
- Fastest
- Node Compat
- Excellent
- Security
- Standard
- TypeScript
- Native
- Package Manager
- Built-in
Winner by Category
Best for Beginners
bunBetter Node compatibility
Best for Customisation
denoMore security options
Best for Speed
bunSignificantly faster
Best for Learning
TieBoth are easy to learn
Best Value
TieBoth are open source
Our Recommendation
Try Bun for the fastest JavaScript runtime with Node compatibility. Use Deno when security sandboxing is important.
When to Choose Each Tool
1
Choose Bun
Performance-critical or Node migration
2
Choose Deno
Security-focused applications
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