Deno vs Bun
Side-by-side comparison of Deno and Bun. Pricing, features, best use cases, and honest verdict from a developer who has tested both.
Key Takeaways
- +Deno is better for: runtime, javascript, typescript
- +Bun is better for: runtime, javascript, typescript
- ~Both are infrastructure tools. Your choice depends on workflow preference and team setup.
Deno
Secure-by-default JavaScript and TypeScript runtime from Node's original creator. Built-in TypeScript, fmt, lint, test, and Deno Deploy for edge hosting.
Bun
All-in-one JavaScript runtime, bundler, test runner, and package manager. Written in Zig, drop-in compatible with Node, dramatically faster install and start times.
Feature Comparison
| Feature | Deno | Bun |
|---|---|---|
| Category | Infrastructure | Infrastructure |
| Type | Developer Tool | Developer Tool |
| Pricing | See website for pricing | See website for pricing |
| Best For | CDN, DNS, and edge compute | AI-powered development |
| Language / Platform | TypeScript | TypeScript |
| Open Source | No | No |
In Depth
Deno
Deno is Ryan Dahl's redo of Node with the lessons of a decade applied. It runs TypeScript natively, sandboxes file and network access by default, and ships a full toolchain (fmt, lint, test, bench) in one binary. v2 added full npm and Node compatibility, which removed the biggest historical objection. Deno Deploy is a serverless edge runtime that pairs well with the language. A great fit for greenfield TypeScript projects that value secure-by-default and a unified toolchain.
Bun
Bun bundles a JavaScript runtime, package manager, bundler, and test runner into a single binary written in Zig. It is largely Node-compatible, so most apps drop in without changes, and it is much faster: bun install routinely runs 10x faster than npm, and the runtime starts cold faster than Node. Bun also has first-class TypeScript and JSX support out of the box. It is the runtime of choice for new TypeScript projects that want speed without giving up the npm ecosystem.
The Verdict
Both Deno and Bun are strong tools in the infrastructure space. The right choice depends on your workflow. Read the full review of each tool for a deeper dive, or watch the video walkthroughs to see them in action.
