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core-js vs SEMrush

Based on 1599 and 1 real audits

View core-js details | View SEMrush details
Metriccore-jsSEMrushWinner
Performance3631core-js
Accessibility8897SEMrush
Best Practices8481core-js
SEO9192SEMrush
Security6565Tie
TTFB379ms263msSEMrush
Composite7275SEMrush
Performance
core-js
36
SEMrush
31
Accessibility
core-js
88
SEMrush
97
Security
core-js
65
SEMrush
65
SEO
core-js
91
SEMrush
92
Composite
core-js
72
SEMrush
75

SEMrush outperforms core-js in 4 of 7 categories, with a stronger composite score (75 vs 72). core-js leads in performance, best practices.

When to choose core-js

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

When to choose SEMrush

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

How this comparison was built

Scores are medians across 1599 audited core-js sites and 1 audited SEMrush 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 SEMrush?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 31 on average).
Which has better security, core-js or SEMrush?
core-js sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, core-js or SEMrush?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor SEMrush (97 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 SEMrush?
SEMrush sites score higher on Lighthouse SEO signals (92 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 SEMrush?
SEMrush sites show lower Time to First Byte (263 ms vs 379 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 SEMrush 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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