| Metric | Attentive | Klaviyo | Winner |
|---|---|---|---|
| Performance | 31 | 29 | Attentive |
| Accessibility | 80 | 85 | Klaviyo |
| Best Practices | 75 | 78 | Klaviyo |
| SEO | 100 | 95 | Attentive |
| Security | 64 | 68 | Klaviyo |
| TTFB | 665ms | 310ms | Klaviyo |
| Composite | 70 | 72 | Klaviyo |
Klaviyo outperforms Attentive in 5 of 7 categories, with a stronger composite score (72 vs 70). Attentive leads in performance, SEO.
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