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American Express vs Mastercard

Based on 20 and 21 real audits

View American Express details | View Mastercard details
MetricAmerican ExpressMastercardWinner
Performance4142Mastercard
Accessibility8887American Express
Best Practices9291American Express
SEO9393Tie
Security7878Tie
TTFB309ms302msMastercard
Composite7878Tie
Performance
American Express
41
Mastercard
42
Accessibility
American Express
88
Mastercard
87
Security
American Express
78
Mastercard
78
SEO
American Express
93
Mastercard
93
Composite
American Express
78
Mastercard
78

American Express and Mastercard are closely matched, each leading in different categories. American Express has a composite score of 78 while Mastercard scores 78.

When to choose American Express

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

When to choose Mastercard

Choose Mastercard 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 20 audited American Express sites and 21 audited Mastercard 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 Mastercard?
Based on real BeaverCheck audits, Mastercard sites score higher on Lighthouse performance (42 vs 41 on average).
Which has better security, American Express or Mastercard?
American Express sites score higher on security analysis (78 vs 78 on average).
Which has better accessibility, American Express or Mastercard?
Accessibility scores measured by Lighthouse WCAG 2.1 checks favor American Express (88 vs 87). 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 Mastercard?
American Express sites score higher on Lighthouse SEO signals (93 vs 93 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 Mastercard?
Mastercard sites show lower Time to First Byte (302 ms vs 309 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 Mastercard for my website?
Both platforms have trade-offs. Mastercard 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.
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