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Comparison

Skypack vs UNPKG

Skypack and UNPKG both land on Depends.

Skypack versus UNPKG
CompareSkypackUNPKG
VerdictDependsDepends
Best forNo-build prototypes and demosQuick demos and prototypes
Who it's not forProduction apps needing uptime SLAs or vendor contractsProduction sites . outages have broken thousands
PrivacyNo known public vulnerabilities found in the sources reviewed.²No breach of unpkg itself found, but it is repeatedly abused as phishing infrastructure; one open-redirect report.14
Support qualityNo support evidence foundNo SLA; outages left users stranded
Public sentimentMentions are mostly directory listings and dated community posts praising the no-install CDN approach; recent first-hand feedback is scarce.³Users love the simplicity but repeatedly hit outages and warn against depending on it for anything important.
Biggest gotchaFree forever with no paid tier means no revenue; long-term availability is unproven.⁵Zero SLA or support . when it breaks, your site breaks with it13

Pick Skypack when

  • No-build prototypes and demos
  • Deno users importing packages by URL
  • Single-file browser experiments
  • Learning ESM without tooling

When Skypack is not a fit

  • Production apps needing uptime SLAs or vendor contracts
  • Teams already running bundlers like Vite or webpack
  • Enterprises with security review requirements . no security page exists
  • Long-lived infrastructure pinned to a free service with no revenue

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

  1. Skypack homepageskypack.dev
    official
  2. Skypack security pageskypack.dev
    security
  3. Singapore Deno User Groupfacebook.com
    review
  4. Reddit . Skypack Quality Score discussionreddit.com
    review
  5. Hacker News . Skypack launch discussionnews.ycombinator.com
    news
  6. Compare NPM Alternatives (Skypack, jsDelivr, unpkg)blog.blazingcdn.com
    news
  7. Medium . Joe Alongi on Skypack + Denojoealongi.medium.com
    review
  8. npm supply chain attack coveragegbhackers.com
    security
  9. UNPKG official siteunpkg.com
    official
  10. unpkg/unpkg on GitHubgithub.com
    official
  11. A popular open-source CDN went down . Redditreddit.com
    review
  12. Unpkg down? 520 errors . Reddit r/sysadminreddit.com
    review
  13. UNPKG.com completely unusable . Nylas forumsforums.nylas.com
    review
  14. 175 malicious npm packages exploited unpkg . Socketsocket.dev
    security
  15. 24 npm packages abuse unpkg mirrors . Hacker Newsthehackernews.com
    security
  16. Open redirect report OBB-3870005openbugbounty.org
    security