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core-js vs Klaviyo Customer Hub

Based on 1930 and 10 real audits

View core-js details | View Klaviyo Customer Hub details
Metriccore-jsKlaviyo Customer HubWinner
Performance3732core-js
Accessibility8890Klaviyo Customer Hub
Best Practices8588Klaviyo Customer Hub
SEO9194Klaviyo Customer Hub
Security6879Klaviyo Customer Hub
TTFB476ms119msKlaviyo Customer Hub
Composite7477Klaviyo Customer Hub
Performance
core-js
37
Klaviyo Customer Hub
32
Accessibility
core-js
88
Klaviyo Customer Hub
90
Security
core-js
68
Klaviyo Customer Hub
79
SEO
core-js
91
Klaviyo Customer Hub
94
Composite
core-js
74
Klaviyo Customer Hub
77

Klaviyo Customer Hub outperforms core-js in 6 of 7 categories, with a stronger composite score (77 vs 74). core-js leads in performance.

When to choose core-js

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

When to choose Klaviyo Customer Hub

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

How this comparison was built

Scores are medians across 1930 audited core-js sites and 10 audited Klaviyo Customer Hub 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 Klaviyo Customer Hub?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (37 vs 32 on average).
Which has better security, core-js or Klaviyo Customer Hub?
Klaviyo Customer Hub sites score higher on security analysis (79 vs 68 on average).
Which has better accessibility, core-js or Klaviyo Customer Hub?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Klaviyo Customer Hub (90 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 Klaviyo Customer Hub?
Klaviyo Customer Hub 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 Klaviyo Customer Hub?
Klaviyo Customer Hub sites show lower Time to First Byte (119 ms vs 476 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 Klaviyo Customer Hub 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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