Comparison

jsDelivr vs UNPKG

jsDelivr lands on Worth it, and UNPKG lands on Depends.

jsDelivr

Worth it

Confidence: High

Free and well-regarded for serving open-source files from npm and GitHub . pin exact versions.

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UNPKG

Depends

Confidence: Medium

Use it free for demos, prototypes, and quick script tags . it's dead simple and costs nothing.

Read the full report

jsDelivr versus UNPKG
Compare	jsDelivr	UNPKG
Verdict	Worth it	Depends
Best for	Open-source library authors	Quick demos and prototypes
Who it's not for	Commercial apps needing SLAs or support contracts	Production sites . outages have broken thousands
Privacy	No CVEs against the service itself in sources; a 2023 incident served already-removed malicious npm packages used in phishing.^⁹	No breach of unpkg itself found, but it is repeatedly abused as phishing infrastructure; one open-redirect report.
Support quality	No support-quality evidence in sources	No SLA; outages left users stranded
Public sentiment	Users on Reddit and G2 call it one of the best free JS CDNs for offloading scripts, but complain when outages and 404s break their sites.^⁵	Users love the simplicity but repeatedly hit outages and warn against depending on it for anything important.
Biggest gotcha	Free means no SLA: its outages and 404s become your site's incidents. Pin exact versions.¹²	Zero SLA or support . when it breaks, your site breaks with it

Pick jsDelivr when

Open-source library authors
Front-end devs loading npm/GitHub files
Demos, docs, and prototypes
Offloading static JS from small servers

When jsDelivr is not a fit

Commercial apps needing SLAs or support contracts
First-party production assets with uptime guarantees
Teams that can't accept third-party dependency on critical paths
Enterprises wanting vendor accountability and contracts

Pick UNPKG when

Quick demos and prototypes
Open-source docs and playgrounds
Browser-only apps with no build step
One-off script tags for libraries

When UNPKG is not a fit

Production sites . outages have broken thousands
Anything needing uptime SLAs or support
Security-sensitive orgs worried about supply-chain abuse
High-traffic apps needing guaranteed edge performance

Sources

jsdelivr/jsdelivr . GitHub repogithub.com
official
jsDelivr homepagejsdelivr.com
official
Our Network . jsDelivrjsdelivr.com
official
JSDelivr . Wikipediaen.wikipedia.org
news
jsDelivr Reviews . G2g2.com
review
Just a short review: jsDelivr seems be the best CDN . Redditreddit.com
review
jsdelivr cdn is down . Reddit r/webdevreddit.com
review
jsDelivr Overview, Reviews, Pricing . TrustRadiustrustradius.com
review
CDN Service Exposes Users to Malicious Packages . Check Pointblog.checkpoint.com
security
Global CDN Service 'jsdelivr' Exposed Users to Phishing . Hackreadhackread.com
security
CDN Detected (JsDelivr) . Invictiinvicti.com
security
cdn.jsdelivr.net returning 404 . GitHub issue #18150github.com
news
jsdelivr . Crunchbasecrunchbase.com
news
Top 4 CDN services for hosting open source libraries . opensource.comopensource.com
news
UNPKG official siteunpkg.com
official
unpkg/unpkg on GitHubgithub.com
official