New TypeScript-first projects Edge-deployed APIs via Deno Deploy Solo devs wanting built-in tooling npm-compatible scripts and tooling

Teams migrating large Node codebases expecting zero friction Apps treating the permission sandbox as the only security control Enterprises needing Node-scale ecosystem maturity and support Projects dependent on native-binding npm packages that may break

Deno Review

Depends

Should I use Deno?

A drop-in JavaScript runtime with built-in TypeScript, npm support, and security by default. Run your existing Node project on Deno with no setup. - deno.com

Analyzed September 20, 2026 · 1 month ago

Buy for new TypeScript projects wanting a batteries-included runtime with edge hosting. Skip if you need frictionless migration of a large Node codebase or a hard security sandbox.

Confidence

Medium. Based on 20+ public sources; mixed community reviews and active CVE tracking. Confidence medium.

Ratings

Value for money
Ease of use
Feature depth
Support qualityNo support evidence in sources
Security posture

Pricing

Runtime (CLI)

ModelNot disclosed

Monthly feesNot disclosed

HardwareNot disclosed

Free tierYes

Deno Deploy Free$0

Deno Deploy Pro$20/mo

Best for

New TypeScript-first projects
Edge-deployed APIs via Deno Deploy
Solo devs wanting built-in tooling
npm-compatible scripts and tooling

Not for

Teams migrating large Node codebases expecting zero friction
Apps treating the permission sandbox as the only security control
Enterprises needing Node-scale ecosystem maturity and support
Projects dependent on native-binding npm packages that may break

Gotchas - check before you buy

high

Permission sandbox has real bypass CVEs; not a hard security boundary

medium

Deno Deploy Pro ($20/mo) users complain bandwidth pricing is high

medium

'No setup' migration claim contested; test your npm deps first

low

Core-dependency vulnerability fixes can lag, per community discussion

Pros

Runs existing Node/npm projects natively in Deno 2
Built-in TypeScript with no config
Secure-by-default permission flags for scripts
Built-in deno audit checks dependencies for vulnerabilities
Users report Deno's developer experience beats returning to Node

Cons

'Drop-in' Node replacement overstated; migration friction remains
Some npm packages still incompatible
Far smaller ecosystem and adoption than Node
Multiple 2026 CVEs, including auth bypass

Sources & method

Analyzed September 20, 2026 - 12 sources - Permission-model runtime with real 2026 CVEs (auth bypass, info disclosure); secure-by-default claims questioned by academic studies.

official x4review x4security x2news x2

CVE-2026-22863: Information disclosure, Deno information disclosure vulnerability published in 2026.
CVE-2026-22864: Auth bypass, Attackers can bypass Deno's security controls.
CVE-2026-49401: macOS permission system flaw, Vulnerability identified in Deno's macOS permission system.
CVE-2026-49406: Medium severity, Medium-severity vulnerability tracked against deno.
Academic scrutiny of secure-by-default, NDSS study examines whether Deno delivers its security promises.

Key stats

Value for money: 4/5
Rating
$0
Starting price
12
Sources
September 20, 2026
Analyzed

Value for money: 4/5. Free runtime; Deploy priced competitively
Ease of use: 4/5. Built-in TS and tooling praised
Feature depth: 4/5. npm compat, JSR, audit, permissions
Support quality. No support evidence in sources
Security posture: 3/5. Secure-by-default design, but 2026 CVEs

$20/mo Starting price (Deno Deploy Pro) Free tier available
$0 Runtime cost Open-source CLI
$26M Funding 2 rounds, incl. $21M Series A
828 Companies using tracked by TheirStack

Pricing

Runtime (CLI)

Open source
Full runtime locally

Deno Deploy Free

Hosted edge runtime
Usage limits apply

Deno Deploy Pro

$20/mo

Removes most limits
Bandwidth billed, criticized

Security

Permission-model runtime with real 2026 CVEs (auth bypass, info disclosure); secure-by-default claims questioned by academic studies.

CVE-2026-22863: Information disclosureDeno information disclosure vulnerability published in 2026.
CVE-2026-22864: Auth bypassAttackers can bypass Deno's security controls.^⁹

CVE-2026-49401: macOS permission system flawVulnerability identified in Deno's macOS permission system.
CVE-2026-49406: Medium severityMedium-severity vulnerability tracked against deno.
Academic scrutiny of secure-by-defaultNDSS study examines whether Deno delivers its security promises.

What users say

Users like Deno's built-in TypeScript and developer experience but report migration friction, npm incompatibilities, and a smaller ecosystem than Node.

“Everytime I use Deno.js it is harder to go back to Node.”

Reddit, r/node

“Deno Is Not the Drop-In Replacement I Hoped For”

Reddit, r/Deno

“Reports of Deno's Demise Have Been Greatly Exaggerated”

Reddit, r/programming

Alternatives

Compare Deno with each alternative.

Node.js
The default runtime; biggest ecosystem and hiring pool.
Bun
Fast all-in-one JS runtime, npm-native.
Deno vs Bun
Cloudflare Workers
Mature edge-hosting alternative to Deno Deploy.
Deno vs Cloudflare Workers

tsx (TypeScript runner on Node)
Guess: run TypeScript on plain Node without switching runtimes.
Deno vs tsx (TypeScript runner on Node)

Companies that use it

Slack

Full analysis

Based on 20+ public sources; mixed community reviews and active CVE tracking. Confidence medium.

Free TS-first runtime that runs npm. Great for greenfield projects; 'drop-in Node replacement' is overstated.

Methodology

Based on 20+ public sources; mixed community reviews and active CVE tracking. Confidence medium.

Read how a report is made.

Sources

Deno homepagedeno.com
official
Announcing Deno 2deno.com
official
Deno Deploy Pricingdeno.com
official
deno audit docsdocs.deno.com
official
Deno Is Not the Drop-In Replacement I Hoped Forreddit.com
review
Bun vs Deno vs Node migration datamedium.com
review
Why didn't Deno take off?spencerpauly.com
review
Deno Deploy bandwidth cost complaintsreddit.com
review
CVE-2026-22864: Deno Auth Bypasssentinelone.com
security
CVE-2026-27190 Detail - NVDnvd.nist.gov
security
Deno raises $21Mtechcrunch.com
news
Companies that use Deno (828)theirstack.com
news

Add this review to your site

This check for Deno says Depends.

Put the badge on your site.

Visitors see the independent review.

The link points here, and search engines follow it.

This is the badge visitors see on your site.

Depends Deno Independent review on Should I Use It

Badge code

<!-- Should I Use It badge. Keep this link. -->
<a href="https://shouldiuse.io/r/deno" target="_blank" style="display:inline-flex;flex-direction:column;align-items:flex-start;gap:8px;max-width:420px;box-sizing:border-box;padding:14px 16px;border:1px solid #d5dde4;border-radius:14px;background:#ffffff;color:#111111;font-family:Segoe UI,system-ui,sans-serif;line-height:1.25;text-decoration:none;box-shadow:0 8px 20px rgba(17,17,17,0.08);">
  <span style="display:flex;align-items:center;gap:10px;min-width:0;">
    <span style="display:inline-flex;align-items:center;flex:0 0 auto;border-radius:999px;padding:4px 10px;font-size:11px;font-weight:700;letter-spacing:0.06em;text-transform:uppercase;line-height:1.3;background:#fef7e0;color:#7a5510;">Depends</span>
    <span style="font-size:15px;font-weight:700;color:#111111;overflow-wrap:anywhere;">Deno</span>
  </span>
  <span style="font-size:12px;font-weight:500;color:#516271;">Independent review on Should I Use It</span>
</a>

Text link

<a href="https://shouldiuse.io/r/deno">Deno review on Should I Use It: Depends</a>

Paste one snippet. Keep the link as it is. A nofollow tag stops search engines from following it.

Rate this review

Anonymous. You can change your vote.

Loading votes…

Comments

One queue. No nested comments. Give a display name first. Limit: 200 words per comment and 7 comments per day. You can edit or delete yours.

No comments yet.

Categories

Deno Review

Confidence

Ratings

Pricing