Based on 3 and 34 real audits
| Metric | American Express | Klaviyo | Winner |
|---|---|---|---|
| Performance | 35 | 26 | American Express |
| Accessibility | 81 | 87 | Klaviyo |
| Best Practices | 96 | 80 | American Express |
| SEO | 92 | 92 | Tie |
| Security | 73 | 71 | American Express |
| TTFB | 131ms | 191ms | American Express |
| Composite | 72 | 72 | Tie |
American Express outperforms Klaviyo in 4 of 7 categories, with a stronger composite score (72 vs 72). Klaviyo leads in accessibility.
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