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core-js vs Rubicon Project

Based on 1582 and 28 real audits

View core-js details | View Rubicon Project details
Metriccore-jsRubicon ProjectWinner
Performance3630core-js
Accessibility8885core-js
Best Practices8477core-js
SEO9191Tie
Security6564core-js
TTFB374ms347msRubicon Project
Composite7271core-js
Performance
core-js
36
Rubicon Project
30
Accessibility
core-js
88
Rubicon Project
85
Security
core-js
65
Rubicon Project
64
SEO
core-js
91
Rubicon Project
91
Composite
core-js
72
Rubicon Project
71

core-js outperforms Rubicon Project in 5 of 7 categories, with a stronger composite score (72 vs 71). Rubicon Project leads in TTFB.

When to choose core-js

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

When to choose Rubicon Project

Choose Rubicon Project when your primary concern is server response time. 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 28 audited Rubicon Project 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 Rubicon Project?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 30 on average).
Which has better security, core-js or Rubicon Project?
core-js sites score higher on security analysis (65 vs 64 on average).
Which has better accessibility, core-js or Rubicon Project?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 85). 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 Rubicon Project?
core-js sites score higher on Lighthouse SEO signals (91 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 Rubicon Project?
Rubicon Project sites show lower Time to First Byte (347 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 Rubicon Project 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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