shouldiuse.io

New check

Comparison

Skypack vs ESM>CDN (esm.sh)

Skypack and ESM>CDN (esm.sh) both land on Depends.

Skypack versus ESM>CDN (esm.sh)
CompareSkypackESM>CDN (esm.sh)
VerdictDependsDepends
Best forNo-build prototypes and demosZero-build prototypes and demos
Who it's not forProduction apps needing uptime SLAs or vendor contractsProduction apps needing uptime SLAs or guarantees
PrivacyNo known public vulnerabilities found in the sources reviewed.²Two 2025 CVEs (path traversal pre-v136, full-response SSRF in v136); no public security page.15
Support qualityNo support evidence foundNo support evidence found
Public sentimentMentions are mostly directory listings and dated community posts praising the no-install CDN approach; recent first-hand feedback is scarce.³Developers . especially in the Deno community . like the zero-build npm-by-URL workflow but report occasional package-resolution bugs.13
Biggest gotchaFree forever with no paid tier means no revenue; long-term availability is unproven.⁵Runtime dependency: outages or CVEs hit your users directly, not your repo

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 ESM>CDN (esm.sh) when

  • Zero-build prototypes and demos
  • Deno projects importing npm packages
  • Static sites wanting React without a bundler
  • Self-hosters bringing their own cache

When ESM>CDN (esm.sh) is not a fit

  • Production apps needing uptime SLAs or guarantees
  • Orgs with strict supply-chain and security reviews
  • Anyone wanting paid support contracts . none documented
  • Air-gapped or offline environments

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. ESM>CDN . official siteesm.sh
    official
  10. esm-dev/esm.sh on GitHubgithub.com
    official
  11. Going back to basics with Zero-Build Reactdev.to
    review
  12. Running React 19 From a CDN using esm.sh . Peter Kellnerpeterkellner.net
    review
  13. esm.sh ESM CDN v55 release . r/Denoreddit.com
    review
  14. esm.sh importing wrong @reduxjs/toolkit entry . r/Denoreddit.com
    review
  15. CVE-2025-65025 . path traversalx.com
    security
  16. CVE-2025-50180 . full-response SSRFx.com
    security