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core-js vs VWO

Based on 2041 and 97 real audits

View core-js details | View VWO details
Metriccore-jsVWOWinner
Performance3740VWO
Accessibility8887core-js
Best Practices8686Tie
SEO9190core-js
Security6866core-js
TTFB483ms292msVWO
Composite7473core-js
Performance
core-js
37
VWO
40
Accessibility
core-js
88
VWO
87
Security
core-js
68
VWO
66
SEO
core-js
91
VWO
90
Composite
core-js
74
VWO
73

core-js outperforms VWO in 4 of 7 categories, with a stronger composite score (74 vs 73). VWO leads in performance, TTFB.

When to choose core-js

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

When to choose VWO

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

How this comparison was built

Scores are medians across 2041 audited core-js sites and 97 audited VWO 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 VWO?
Based on real BeaverCheck audits, VWO sites score higher on Lighthouse performance (40 vs 37 on average).
Which has better security, core-js or VWO?
core-js sites score higher on security analysis (68 vs 66 on average).
Which has better accessibility, core-js or VWO?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 87). 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 VWO?
core-js sites score higher on Lighthouse SEO signals (91 vs 90 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 VWO?
VWO sites show lower Time to First Byte (292 ms vs 483 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 VWO for my website?
Both platforms have trade-offs. VWO 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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