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core-js vs Klaviyo Customer Hub

Based on 1582 and 3 real audits

View core-js details | View Klaviyo Customer Hub details
Metriccore-jsKlaviyo Customer HubWinner
Performance3627core-js
Accessibility8889Klaviyo Customer Hub
Best Practices8483core-js
SEO9194Klaviyo Customer Hub
Security6571Klaviyo Customer Hub
TTFB374ms131msKlaviyo Customer Hub
Composite7272Tie
Performance
core-js
36
Klaviyo Customer Hub
27
Accessibility
core-js
88
Klaviyo Customer Hub
89
Security
core-js
65
Klaviyo Customer Hub
71
SEO
core-js
91
Klaviyo Customer Hub
94
Composite
core-js
72
Klaviyo Customer Hub
72

Klaviyo Customer Hub outperforms core-js in 4 of 7 categories, with a stronger composite score (72 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 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 1582 audited core-js sites and 3 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 →

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 Klaviyo Customer Hub?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 27 on average).
Which has better security, core-js or Klaviyo Customer Hub?
Klaviyo Customer Hub sites score higher on security analysis (71 vs 65 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 (89 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 (131 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 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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