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core-js vs GrowthBook

Based on 1841 and 21 real audits

View core-js details | View GrowthBook details
Metriccore-jsGrowthBookWinner
Performance3734core-js
Accessibility8886core-js
Best Practices8585Tie
SEO9193GrowthBook
Security6766core-js
TTFB439ms161msGrowthBook
Composite7473core-js
Performance
core-js
37
GrowthBook
34
Accessibility
core-js
88
GrowthBook
86
Security
core-js
67
GrowthBook
66
SEO
core-js
91
GrowthBook
93
Composite
core-js
74
GrowthBook
73

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

When to choose core-js

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

When to choose GrowthBook

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

How this comparison was built

Scores are medians across 1841 audited core-js sites and 21 audited GrowthBook 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 GrowthBook?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (37 vs 34 on average).
Which has better security, core-js or GrowthBook?
core-js sites score higher on security analysis (67 vs 66 on average).
Which has better accessibility, core-js or GrowthBook?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 86). 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 GrowthBook?
GrowthBook sites score higher on Lighthouse SEO signals (93 vs 91 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 GrowthBook?
GrowthBook sites show lower Time to First Byte (161 ms vs 439 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 GrowthBook 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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