Skip to content

core-js vs Userback

Based on 1599 and 2 real audits

View core-js details | View Userback details
Metriccore-jsUserbackWinner
Performance3658Userback
Accessibility8894Userback
Best Practices8482core-js
SEO9196Userback
Security6568Userback
TTFB379ms98msUserback
Composite7275Userback
Performance
core-js
36
Userback
58
Accessibility
core-js
88
Userback
94
Security
core-js
65
Userback
68
SEO
core-js
91
Userback
96
Composite
core-js
72
Userback
75

Userback outperforms core-js in 6 of 7 categories, with a stronger composite score (75 vs 72). 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 Userback

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

How this comparison was built

Scores are medians across 1599 audited core-js sites and 2 audited Userback 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 Userback?
Based on real BeaverCheck audits, Userback sites score higher on Lighthouse performance (58 vs 36 on average).
Which has better security, core-js or Userback?
Userback sites score higher on security analysis (68 vs 65 on average).
Which has better accessibility, core-js or Userback?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor Userback (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 Userback?
Userback sites score higher on Lighthouse SEO signals (96 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 Userback?
Userback sites show lower Time to First Byte (98 ms vs 379 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 Userback for my website?
Both platforms have trade-offs. Userback 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