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Deno
Secure JavaScript runtime by Ryan Dahl — TypeScript by default, Web Standard APIs, no node_modules.
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About Deno
Deno is a JavaScript and TypeScript runtime created by Ryan Dahl (the original creator of Node.js) to fix Node.js''s design mistakes. No node_modules directory, TypeScript out of the box, and security-first with explicit permission flags.
Deno vs Node.js: Deno has no node_modules (imports via URL or deno.json import map), TypeScript natively (no ts-node), and security by default (no file/network access without --allow flags). Deno 2 significantly improved Node.js compatibility with npm: prefix imports.
Deno vs Bun: Bun focuses on maximum performance (3x faster HTTP than Node.js). Deno focuses on Web Standards compliance — fetch, WebSocket, Web Crypto, and browser APIs work identically.
Deno Deploy: serverless edge platform in 35+ global regions with 100,000 free requests/day.
Key Features
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TypeScript native: run .ts files directly with no build step or tsconfig required
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Permission system: --allow-net, --allow-read, --allow-write, --allow-env flags per script
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Web Standards: fetch, Response, Request, WebSocket identical to browsers
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deno task: task runner replacing npm scripts with a Makefile-like deno.json config
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Deno Deploy: edge function hosting in 35+ regions with 100K free daily requests
Pros
- ✓TypeScript out of the box — no tsconfig, no ts-node, no build step
- ✓Security by default: --allow-net, --allow-read, --allow-write required — least privilege
- ✓Web Standard APIs: fetch, WebSocket, Web Crypto work identically to browsers
- ✓No node_modules: imports via URL or import map — no package installation step
- ✓Deno Deploy: serverless edge platform with 100K free requests/day in 35+ regions
Cons
- ✗Smaller ecosystem than Node.js/npm despite Deno 2''s npm compatibility mode
- ✗Import URL model is unfamiliar for developers from Node.js backgrounds
- ✗Performance is between Node.js and Bun — not the fastest for raw HTTP throughput
Who is using Deno?
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TypeScript developers who want a runtime where TypeScript works without build tooling
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Security-conscious teams who want explicit permission grants for file and network access
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Frontend developers who want the same Web APIs to work in backend code
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Teams deploying edge functions on Deno Deploy''s simple global platform
Use Cases
- →Running TypeScript files directly with `deno run my-file.ts` without transpilation
- →Building a fetch-based HTTP client that works in both the browser and Deno
- →Deploying an edge function to Deno Deploy in 30 seconds with one `deno deploy` command
- →Using --allow-net to restrict a script to only access specific external URLs
Pricing
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Open Source : $0/forever — Full runtime, MIT license, All features, Community support
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Deno Deploy : $0.00001/request — 35+ regions, Edge functions, 100K free/day
Pricing details may not be up to date. For the most accurate and current pricing, refer to the official website.
What Makes Deno Unique?
The JavaScript runtime by Node.js''s original creator — TypeScript natively (no build step), security by default, and Web Standard APIs identical to browsers, with Deno Deploy for global edge deployment.
How We Rated It
Feature comparison from Deno and Node.js documentation. Deno Deploy pricing from deno.com/deploy.
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Accuracy and Reliability 4.5/5
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Ease of Use 4.6/5
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Functionality and Features 4.5/5
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Performance and Speed 4.6/5
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Customer Support 4.4/5
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Value for Money 4.8/5
AI summary
Secure JavaScript runtime by Ryan Dahl — TypeScript by default, Web Standard APIs, no node_modules.