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Bun vs Deno
A detailed comparison to help you choose between Bun and Deno.
Last reviewed:
| Feature | Bun | Deno |
|---|---|---|
| Pricing Model | Open Source | Open Source |
| Free Tier | Yes | Yes |
| Monthly Cost (Solo) | $0 | $0 |
| Target Audience | developers, solopreneurs | developers, solopreneurs |
| Verified | No | No |
| Solo-Friendly | Yes | Yes |
| Open Source | Yes | Yes |
| Editorial Rating | 4.5/5 | 4.2/5 |
| Categories | Developer Tools | Developer Tools |
| Key Features | JavaScript/TypeScript runtime, Built-in bundler, Native package manager, Built-in test runner, SQLite driver | Secure by default (permissions), Built-in TypeScript, URL-based imports, Built-in formatter and linter, Deno Deploy (edge hosting) |
| Free Tier Quality | excellent | excellent |
Pricing Breakdown
Bun
Free forever. Open-source (MIT license).
Deno
Runtime: free (open-source). Deploy Free: 100K req/day. Deploy Pro: $20/month. Deploy Enterprise: custom.
Integration Overlap
Shared Integrations (3)
npm packagesDockerGitHub Actions
Only in Bun (5)
TypeScriptReactNext.jsExpressSQLite
Only in Deno (5)
Fresh frameworkOak frameworkDeno DeploySupabaseCloudflare
Use Case Fit
Bun
- * Fast JavaScript/TypeScript development
- * API server development
- * Build tool replacement
- * Package management
- * Testing
Deno
- * Edge function development
- * Secure script execution
- * TypeScript API development
- * Serverless functions
- * CLI tool development
Bun
Pros
- + Dramatically faster than Node.js
- + All-in-one replaces multiple tools
- + Native TypeScript without config
- + Excellent Node.js compatibility
Cons
- - Newer runtime with some edge cases
- - Not all Node.js packages work perfectly
- - Smaller ecosystem than Node.js
- - Windows support is newer
Deno
Pros
- + Security-first with permissions model
- + Built-in toolchain (format, lint, test)
- + Excellent TypeScript support
- + Deno Deploy for edge computing
Cons
- - Smaller ecosystem than Node.js
- - Some npm packages need adapters
- - Learning curve for permissions model
- - Fewer hosting options than Node.js
Editorial Verdict
Both tools are evenly matched on price. Bun excels at fast javascript/typescript development, while Deno is stronger for edge function development.
SaaSLens Editorial Team
Editorial Team