Bun vs Deno
Updated June 2026 · A structured head-to-head comparison.
The verdict
Both Bun and Deno are credible development it tools, and the right pick comes down to your priorities.
Bun — Fast all-in-one JavaScript runtime.
Deno — Secure JS/TS runtime + edge deploy.
Bun vs Deno: side by side
| Dimension | Bun | Deno |
|---|---|---|
| Starting price | Free | Free – $20/mo |
| Free plan | Yes | Yes |
| Pricing model | Open source | Freemium |
| Best for | Developers | Developers |
| Platforms | Mac, Linux, Windows | Mac, Linux, Windows, Web |
| Rating | 4.7/5 | 4.6/5 |
Bun key facts
- Vendor
- Oven
- Pricing
- Open source — Free
- Free tier
- Yes
- Platforms
- Mac, Linux, Windows
- Best for
- Developers
- Editor rating
- 4.7 / 5
- Founded
- 2021
- Headquarters
- San Francisco, CA, USA
Deno key facts
- Vendor
- Deno
- Pricing
- Freemium — Free – $20/mo
- Free tier
- Yes
- Platforms
- Mac, Linux, Windows, Web
- Best for
- Developers
- Editor rating
- 4.6 / 5
- Founded
- 2018
- Headquarters
- Remote
Frequently asked questions
Is Bun better than Deno?
Neither is universally better — Bun edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Bun or Deno cheaper?
Bun is the more affordable of the two to get started, at free. Bun starts at free; Deno starts at free – $20/mo.
Can Bun replace Deno?
Yes for most teams — both are development it tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.