Based on 27 and 1 real audits
| Metric | American Express | Proof Factor | Winner |
|---|---|---|---|
| Performance | 40 | 34 | American Express |
| Accessibility | 88 | 83 | American Express |
| Best Practices | 91 | 81 | American Express |
| SEO | 93 | 100 | Proof Factor |
| Security | 78 | 83 | Proof Factor |
| TTFB | 269ms | 100ms | Proof Factor |
| Composite | 79 | 81 | Proof Factor |
Proof Factor outperforms American Express in 4 of 7 categories, with a stronger composite score (81 vs 79). American Express leads in performance, accessibility, best practices.
Choose American Express when your primary concern is best practices and performance. Its audit data shows consistent strength in these areas across the sampled sites.
Choose Proof Factor when your primary concern is server response time and SEO. Its audit data shows consistent strength in these areas across the sampled sites.
Scores are medians across 27 audited American Express sites and 1 audited Proof Factor 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.
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