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core-js vs Zip

Based on 1650 and 1 real audits

View core-js details | View Zip details
Metriccore-jsZipWinner
Performance3618core-js
Accessibility8882core-js
Best Practices8496Zip
SEO9177core-js
Security6680Zip
TTFB387ms957mscore-js
Composite7380Zip
Performance
core-js
36
Zip
18
Accessibility
core-js
88
Zip
82
Security
core-js
66
Zip
80
SEO
core-js
91
Zip
77
Composite
core-js
73
Zip
80

core-js outperforms Zip in 4 of 7 categories, with a stronger composite score (73 vs 80). Zip leads in best practices, security, composite score.

When to choose core-js

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

When to choose Zip

Choose Zip when your primary concern is security 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 1650 audited core-js sites and 1 audited Zip 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 →

Small sample: one or both technologies have fewer than 10 audited sites. Treat these numbers as directional — medians stabilize around 20–30 audits per side.

FAQ

Which is faster, core-js or Zip?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 18 on average).
Which has better security, core-js or Zip?
Zip sites score higher on security analysis (80 vs 66 on average).
Which has better accessibility, core-js or Zip?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 82). 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 Zip?
core-js sites score higher on Lighthouse SEO signals (91 vs 77 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 Zip?
core-js sites show lower Time to First Byte (387 ms vs 957 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 Zip for my website?
Both platforms have trade-offs. core-js 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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