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core-js vs Foundation

Based on 1582 and 31 real audits

View core-js details | View Foundation details
Metriccore-jsFoundationWinner
Performance3641Foundation
Accessibility8888Tie
Best Practices8483core-js
SEO9191Tie
Security6565Tie
TTFB374ms449mscore-js
Composite7273Foundation
Performance
core-js
36
Foundation
41
Accessibility
core-js
88
Foundation
88
Security
core-js
65
Foundation
65
SEO
core-js
91
Foundation
91
Composite
core-js
72
Foundation
73

core-js and Foundation are closely matched, each leading in different categories. core-js has a composite score of 72 while Foundation scores 73.

When to choose core-js

Choose core-js when your primary concern is server response time and best practices. Its audit data shows consistent strength in these areas across the sampled sites.

When to choose Foundation

Choose Foundation when your primary concern is 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 31 audited Foundation 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 Foundation?
Based on real BeaverCheck audits, Foundation sites score higher on Lighthouse performance (41 vs 36 on average).
Which has better security, core-js or Foundation?
core-js sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, core-js or Foundation?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 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 Foundation?
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 Foundation?
core-js sites show lower Time to First Byte (374 ms vs 449 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 Foundation for my website?
Both platforms have trade-offs. Foundation 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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