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core-js vs Klaviyo Forms

Based on 1810 and 10 real audits

View core-js details | View Klaviyo Forms details
Metriccore-jsKlaviyo FormsWinner
Performance3726core-js
Accessibility8884core-js
Best Practices8577core-js
SEO9189core-js
Security6772Klaviyo Forms
TTFB430ms246msKlaviyo Forms
Composite7372core-js
Performance
core-js
37
Klaviyo Forms
26
Accessibility
core-js
88
Klaviyo Forms
84
Security
core-js
67
Klaviyo Forms
72
SEO
core-js
91
Klaviyo Forms
89
Composite
core-js
73
Klaviyo Forms
72

core-js outperforms Klaviyo Forms in 5 of 7 categories, with a stronger composite score (73 vs 72). Klaviyo Forms leads in security, TTFB.

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 Forms

Choose Klaviyo Forms 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 1810 audited core-js sites and 10 audited Klaviyo Forms 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 Forms?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (37 vs 26 on average).
Which has better security, core-js or Klaviyo Forms?
Klaviyo Forms sites score higher on security analysis (72 vs 67 on average).
Which has better accessibility, core-js or Klaviyo Forms?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 84). 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 Forms?
core-js sites score higher on Lighthouse SEO signals (91 vs 89 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 Forms?
Klaviyo Forms sites show lower Time to First Byte (246 ms vs 430 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 Forms 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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