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core-js vs Kestrel

Based on 1747 and 16 real audits

View core-js details | View Kestrel details
Metriccore-jsKestrelWinner
Performance3741Kestrel
Accessibility8894Kestrel
Best Practices8581core-js
SEO9193Kestrel
Security6666Tie
TTFB424ms411msKestrel
Composite7373Tie
Performance
core-js
37
Kestrel
41
Accessibility
core-js
88
Kestrel
94
Security
core-js
66
Kestrel
66
SEO
core-js
91
Kestrel
93
Composite
core-js
73
Kestrel
73

Kestrel outperforms core-js in 4 of 7 categories, with a stronger composite score (73 vs 73). core-js leads in best practices.

When to choose core-js

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

When to choose Kestrel

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

How this comparison was built

Scores are medians across 1747 audited core-js sites and 16 audited Kestrel 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 Kestrel?
Based on real BeaverCheck audits, Kestrel sites score higher on Lighthouse performance (41 vs 37 on average).
Which has better security, core-js or Kestrel?
core-js sites score higher on security analysis (66 vs 66 on average).
Which has better accessibility, core-js or Kestrel?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Kestrel (94 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 Kestrel?
Kestrel 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 Kestrel?
Kestrel sites show lower Time to First Byte (411 ms vs 424 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 Kestrel for my website?
Both platforms have trade-offs. Kestrel 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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