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core-js vs Emarsys

Based on 1582 and 6 real audits

View core-js details | View Emarsys details
Metriccore-jsEmarsysWinner
Performance3638Emarsys
Accessibility8886core-js
Best Practices8488Emarsys
SEO9193Emarsys
Security6564core-js
TTFB374ms215msEmarsys
Composite7271core-js
Performance
core-js
36
Emarsys
38
Accessibility
core-js
88
Emarsys
86
Security
core-js
65
Emarsys
64
SEO
core-js
91
Emarsys
93
Composite
core-js
72
Emarsys
71

Emarsys outperforms core-js in 4 of 7 categories, with a stronger composite score (71 vs 72). core-js leads in accessibility, security, composite score.

When to choose core-js

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

When to choose Emarsys

Choose Emarsys 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 Emarsys 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 Emarsys?
Based on real BeaverCheck audits, Emarsys sites score higher on Lighthouse performance (38 vs 36 on average).
Which has better security, core-js or Emarsys?
core-js sites score higher on security analysis (65 vs 64 on average).
Which has better accessibility, core-js or Emarsys?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 86). 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 Emarsys?
Emarsys sites score higher on Lighthouse SEO signals (93 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 Emarsys?
Emarsys sites show lower Time to First Byte (215 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 Emarsys for my website?
Both platforms have trade-offs. Emarsys 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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