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core-js vs Lever

Based on 1599 and 5 real audits

View core-js details | View Lever details
Metriccore-jsLeverWinner
Performance3635core-js
Accessibility8886core-js
Best Practices8480core-js
SEO9189core-js
Security6573Lever
TTFB379ms150msLever
Composite7274Lever
Performance
core-js
36
Lever
35
Accessibility
core-js
88
Lever
86
Security
core-js
65
Lever
73
SEO
core-js
91
Lever
89
Composite
core-js
72
Lever
74

core-js outperforms Lever in 4 of 7 categories, with a stronger composite score (72 vs 74). Lever leads in security, TTFB, composite score.

When to choose core-js

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

When to choose Lever

Choose Lever 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 1599 audited core-js sites and 5 audited Lever 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 Lever?
Based on real BeaverCheck audits, core-js sites score higher on Lighthouse performance (36 vs 35 on average).
Which has better security, core-js or Lever?
Lever sites score higher on security analysis (73 vs 65 on average).
Which has better accessibility, core-js or Lever?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor core-js (88 vs 86). 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 Lever?
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 Lever?
Lever sites show lower Time to First Byte (150 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 Lever 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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