Languages & Runtimes · comparison
Bun vs Deno
Both Bun and Deno are languages & runtimes. Here's how they compare at a glance — and remember you can add both to your stack and ask Smart Stack a question grounded in each one's current docs.
| Attribute | Bun | Deno |
|---|---|---|
| Category | Languages & Runtimes | Languages & Runtimes |
| Language | Zig | TypeScript |
| First released | 2022 | 2020 |
| License | MIT | MIT |
| Latest version | v1.1.0 | v2.1.0 |
| Pages indexed | 230 | 210 |
| Documentation | Bun docs → | Deno docs → |
When to choose Bun
Choose Bun when raw speed and an all-in-one toolchain matter and you want Node.js compatibility.
Explore Bun docs →When to choose Deno
Choose Deno for secure-by-default scripts and services with batteries-included tooling and native TS.
Explore Deno docs →$ smart-stack ask
Still deciding between Bun and Deno?
Add both to your stack and ask Smart Stack. It pulls from each tool's official docs — ideal when you're weighing a choice or planning a migration.
>Should I use Bun or Deno for my project?
Compare in Smart StackBun vs Deno — FAQ
What is the difference between Bun and Deno?
Bun — Incredibly fast JavaScript runtime, bundler, and package manager. Deno — The next-generation JavaScript runtime. Both sit in the languages & runtimes space; the right pick depends on your constraints, which the comparison above breaks down.
Is Bun better than Deno?
Neither is universally "better." Choose Bun when raw speed and an all-in-one toolchain matter and you want Node.js compatibility. Choose Deno for secure-by-default scripts and services with batteries-included tooling and native TS. Ask Smart Stack with both in your stack to get an answer grounded in their current docs.
Can Smart Stack answer questions about both Bun and Deno?
Yes — add both to your stack and Smart Stack searches the official docs for each, which is especially useful when you're migrating from one to the other or weighing a decision.