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core-js vs Sift

Based on 2041 and 15 real audits

View core-js details | View Sift details
Metriccore-jsSiftWinner
Performance3726core-js
Accessibility8891Sift
Best Practices8690Sift
SEO9194Sift
Security6873Sift
TTFB483ms261msSift
Composite7476Sift
Performance
core-js
37
Sift
26
Accessibility
core-js
88
Sift
91
Security
core-js
68
Sift
73
SEO
core-js
91
Sift
94
Composite
core-js
74
Sift
76

Sift outperforms core-js in 6 of 7 categories, with a stronger composite score (76 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 Sift

Choose Sift 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 2041 audited core-js sites and 15 audited Sift 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 Sift?
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 Sift?
Sift sites score higher on security analysis (73 vs 68 on average).
Which has better accessibility, core-js or Sift?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Sift (91 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 Sift?
Sift 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 Sift?
Sift sites show lower Time to First Byte (261 ms vs 483 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 Sift 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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