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core-js vs Zepto

Based on 1726 and 17 real audits

View core-js details | View Zepto details
Metriccore-jsZeptoWinner
Performance3741Zepto
Accessibility8883core-js
Best Practices8485Zepto
SEO9189core-js
Security6667Zepto
TTFB421ms1436mscore-js
Composite7372core-js
Performance
core-js
37
Zepto
41
Accessibility
core-js
88
Zepto
83
Security
core-js
66
Zepto
67
SEO
core-js
91
Zepto
89
Composite
core-js
73
Zepto
72

core-js outperforms Zepto in 4 of 7 categories, with a stronger composite score (73 vs 72). Zepto leads in performance, best practices, security.

When to choose core-js

Choose core-js when your primary concern is server response time and accessibility. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Zepto

Choose Zepto when your primary concern is performance and best practices. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1726 audited core-js sites and 17 audited Zepto sites in the BeaverCheck database. Every audit runs the same 100+ checks — Lighthouse performance, security headers, accessibility, SEO, server response time — against a real URL. No vendor input, no sponsorship, no affiliate links. Read the full methodology →

FAQ

Which is faster, core-js or Zepto?
Based on real BeaverCheck audits, Zepto sites score higher on Lighthouse performance (41 vs 37 on average).
Which has better security, core-js or Zepto?
Zepto sites score higher on security analysis (67 vs 66 on average).
Which has better accessibility, core-js or Zepto?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 83). Both technologies can be made fully accessible with care — the difference reflects common patterns in the sampled sites, not inherent platform limits.
Which is better for SEO, core-js or Zepto?
core-js sites score higher on Lighthouse SEO signals (91 vs 89 on average), which cover meta tags, crawlability, mobile friendliness, and structured data. Content strategy and backlinks still matter more than platform choice for ranking.
Which has faster server response (TTFB), core-js or Zepto?
core-js sites show lower Time to First Byte (421 ms vs 1436 ms on average). TTFB depends heavily on hosting and CDN setup rather than the technology itself, but the sampled sites suggest a meaningful difference in common deployment patterns.
Should I choose core-js or Zepto for my website?
Both platforms have trade-offs. Zepto scores higher on overall composite score while core-js may excel in metrics you care about most. Run a free BeaverCheck audit on a real site using each to compare the metrics relevant to your use case.
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