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core-js vs Zepto

Based on 1582 and 15 real audits

View core-js details | View Zepto details
Metriccore-jsZeptoWinner
Performance3643Zepto
Accessibility8883core-js
Best Practices8483core-js
SEO9189core-js
Security6566Zepto
TTFB374ms1453mscore-js
Composite7271core-js
Performance
core-js
36
Zepto
43
Accessibility
core-js
88
Zepto
83
Security
core-js
65
Zepto
66
SEO
core-js
91
Zepto
89
Composite
core-js
72
Zepto
71

core-js outperforms Zepto in 5 of 7 categories, with a stronger composite score (72 vs 71). Zepto leads in performance, 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 security. Its audit data shows consistent strength in these areas across the sampled sites.

How this comparison was built

Scores are medians across 1582 audited core-js sites and 15 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 (43 vs 36 on average).
Which has better security, core-js or Zepto?
Zepto sites score higher on security analysis (66 vs 65 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 (374 ms vs 1453 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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