Skip to content

American Express vs core-js

Based on 10 and 1688 real audits

View American Express details | View core-js details
MetricAmerican Expresscore-jsWinner
Performance5036American Express
Accessibility8588core-js
Best Practices9184American Express
SEO9291American Express
Security7766American Express
TTFB331ms396msAmerican Express
Composite7873American Express
Performance
American Express
50
core-js
36
Accessibility
American Express
85
core-js
88
Security
American Express
77
core-js
66
SEO
American Express
92
core-js
91
Composite
American Express
78
core-js
73

American Express outperforms core-js in 6 of 7 categories, with a stronger composite score (78 vs 73). core-js leads in accessibility.

When to choose American Express

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

When to choose core-js

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

How this comparison was built

Scores are medians across 10 audited American Express sites and 1688 audited core-js 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, American Express or core-js?
Based on real BeaverCheck audits, American Express sites score higher on Lighthouse performance (50 vs 36 on average).
Which has better security, American Express or core-js?
American Express sites score higher on security analysis (77 vs 66 on average).
Which has better accessibility, American Express or core-js?
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, American Express or core-js?
American Express sites score higher on Lighthouse SEO signals (92 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), American Express or core-js?
American Express sites show lower Time to First Byte (331 ms vs 396 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 American Express or core-js for my website?
Both platforms have trade-offs. American Express scores higher on overall composite score while American Express 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