Klaviyo vs Sailthru
Head-to-head usage across the sites we track.
Top sites by authority
Klaviyo · Sailthru · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
17
12
Open Page Rank 8+
117
148
Open Page Rank 7+
456
339
Open Page Rank 6+
1,239
482
Open Page Rank 5+
3,036
681
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Klaviyo · Sailthru · share of sites in each country using one or the other
United States
103,547
1,599
United Kingdom
40,783
1,033
Canada
33,265
1,150
Australia
30,331
743
Germany
26,133
682
France
23,908
646
India
22,437
943
Spain
16,738
644
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Klaviyo | Sailthru |
|---|---|---|
| LCP | 1.6 s | 2 s |
| INP | 100 ms | 125 ms |
| CLS | 0 | 0.05 |
| TTFB | 500 ms | 700 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.