Skip to content

core-js vs Prefix-Free

Based on 1582 and 3 real audits

View core-js details | View Prefix-Free details
Metriccore-jsPrefix-FreeWinner
Performance3640Prefix-Free
Accessibility8891Prefix-Free
Best Practices8491Prefix-Free
SEO9189core-js
Security6565Tie
TTFB374ms204msPrefix-Free
Composite7272Tie
Performance
core-js
36
Prefix-Free
40
Accessibility
core-js
88
Prefix-Free
91
Security
core-js
65
Prefix-Free
65
SEO
core-js
91
Prefix-Free
89
Composite
core-js
72
Prefix-Free
72

Prefix-Free outperforms core-js in 4 of 7 categories, with a stronger composite score (72 vs 72). core-js leads in SEO.

When to choose core-js

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

When to choose Prefix-Free

Choose Prefix-Free when your primary concern is server response time and best practices. 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 Prefix-Free 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 Prefix-Free?
Based on real BeaverCheck audits, Prefix-Free sites score higher on Lighthouse performance (40 vs 36 on average).
Which has better security, core-js or Prefix-Free?
core-js sites score higher on security analysis (65 vs 65 on average).
Which has better accessibility, core-js or Prefix-Free?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Prefix-Free (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 Prefix-Free?
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 Prefix-Free?
Prefix-Free sites show lower Time to First Byte (204 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 Prefix-Free for my website?
Both platforms have trade-offs. Prefix-Free 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.
Audit your own site

Send Feedback