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core-js vs CoreMedia

Based on 1582 and 6 real audits

View core-js details | View CoreMedia details
Metriccore-jsCoreMediaWinner
Performance3638CoreMedia
Accessibility8895CoreMedia
Best Practices8496CoreMedia
SEO9194CoreMedia
Security6564core-js
TTFB374ms297msCoreMedia
Composite7273CoreMedia
Performance
core-js
36
CoreMedia
38
Accessibility
core-js
88
CoreMedia
95
Security
core-js
65
CoreMedia
64
SEO
core-js
91
CoreMedia
94
Composite
core-js
72
CoreMedia
73

CoreMedia outperforms core-js in 6 of 7 categories, with a stronger composite score (73 vs 72). core-js leads in security.

When to choose core-js

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

When to choose CoreMedia

Choose CoreMedia 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 1582 audited core-js sites and 6 audited CoreMedia 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 CoreMedia?
Based on real BeaverCheck audits, CoreMedia sites score higher on Lighthouse performance (38 vs 36 on average).
Which has better security, core-js or CoreMedia?
core-js sites score higher on security analysis (65 vs 64 on average).
Which has better accessibility, core-js or CoreMedia?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor CoreMedia (95 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 CoreMedia?
CoreMedia sites score higher on Lighthouse SEO signals (94 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 CoreMedia?
CoreMedia sites show lower Time to First Byte (297 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 CoreMedia for my website?
Both platforms have trade-offs. CoreMedia 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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