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core-js vs UIKit

Based on 1582 and 9 real audits

View core-js details | View UIKit details
Metriccore-jsUIKitWinner
Performance3650UIKit
Accessibility8890UIKit
Best Practices8490UIKit
SEO9191Tie
Security6565Tie
TTFB374ms350msUIKit
Composite7274UIKit
Performance
core-js
36
UIKit
50
Accessibility
core-js
88
UIKit
90
Security
core-js
65
UIKit
65
SEO
core-js
91
UIKit
91
Composite
core-js
72
UIKit
74

UIKit outperforms core-js in 5 of 7 categories, with a stronger composite score (74 vs 72). core-js leads in no categories.

When to choose core-js

core-js doesn't clearly lead UIKit 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 UIKit

Choose UIKit 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 9 audited UIKit 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 UIKit?
Based on real BeaverCheck audits, UIKit sites score higher on Lighthouse performance (50 vs 36 on average).
Which has better security, core-js or UIKit?
core-js sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, core-js or UIKit?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor UIKit (90 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 UIKit?
core-js sites score higher on Lighthouse SEO signals (91 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 UIKit?
UIKit sites show lower Time to First Byte (350 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 UIKit for my website?
Both platforms have trade-offs. UIKit 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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