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core-js vs GOV.UK Frontend

Based on 1582 and 13 real audits

View core-js details | View GOV.UK Frontend details
Metriccore-jsGOV.UK FrontendWinner
Performance3675GOV.UK Frontend
Accessibility8899GOV.UK Frontend
Best Practices84100GOV.UK Frontend
SEO9198GOV.UK Frontend
Security6578GOV.UK Frontend
TTFB374ms216msGOV.UK Frontend
Composite7284GOV.UK Frontend
Performance
core-js
36
GOV.UK Frontend
75
Accessibility
core-js
88
GOV.UK Frontend
99
Security
core-js
65
GOV.UK Frontend
78
SEO
core-js
91
GOV.UK Frontend
98
Composite
core-js
72
GOV.UK Frontend
84

GOV.UK Frontend outperforms core-js in 7 of 7 categories, with a stronger composite score (84 vs 72). core-js leads in no categories.

When to choose core-js

core-js doesn't clearly lead GOV.UK Frontend in any category on the sampled sites — pick it based on developer experience, ecosystem, or existing team skills rather than the audit scores.

When to choose GOV.UK Frontend

Choose GOV.UK Frontend 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 1582 audited core-js sites and 13 audited GOV.UK Frontend 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 GOV.UK Frontend?
Based on real BeaverCheck audits, GOV.UK Frontend sites score higher on Lighthouse performance (75 vs 36 on average).
Which has better security, core-js or GOV.UK Frontend?
GOV.UK Frontend sites score higher on security analysis (78 vs 65 on average).
Which has better accessibility, core-js or GOV.UK Frontend?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor GOV.UK Frontend (99 vs 88). 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 GOV.UK Frontend?
GOV.UK Frontend sites score higher on Lighthouse SEO signals (98 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 GOV.UK Frontend?
GOV.UK Frontend sites show lower Time to First Byte (216 ms vs 374 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 GOV.UK Frontend for my website?
Both platforms have trade-offs. GOV.UK Frontend 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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