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Modernizr vs YUI

Based on 263 and 24 real audits

View Modernizr details | View YUI details
MetricModernizrYUIWinner
Performance4440Modernizr
Accessibility8590YUI
Best Practices8692YUI
SEO9091YUI
Security6468YUI
TTFB400ms354msYUI
Composite7374YUI
Performance
Modernizr
44
YUI
40
Accessibility
Modernizr
85
YUI
90
Security
Modernizr
64
YUI
68
SEO
Modernizr
90
YUI
91
Composite
Modernizr
73
YUI
74

YUI outperforms Modernizr in 6 of 7 categories, with a stronger composite score (74 vs 73). Modernizr leads in performance.

When to choose Modernizr

Choose Modernizr when your primary concern is performance. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose YUI

Choose YUI when your primary concern is server response time 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 263 audited Modernizr sites and 24 audited YUI 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, Modernizr or YUI?
Based on real BeaverCheck audits, Modernizr sites score higher on Lighthouse performance (44 vs 40 on average).
Which has better security, Modernizr or YUI?
YUI sites score higher on security analysis (68 vs 64 on average).
Which has better accessibility, Modernizr or YUI?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor YUI (90 vs 85). 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, Modernizr or YUI?
YUI 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), Modernizr or YUI?
YUI sites show lower Time to First Byte (354 ms vs 400 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 Modernizr or YUI for my website?
Both platforms have trade-offs. Modernizr scores higher on overall composite score while Modernizr 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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