Bold Upsell vs Booster Page Speed Optimizer
Head-to-head usage across the sites we track.
Top sites by authority
Bold Upsell · Booster Page Speed Optimizer · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bold Upsell · Booster Page Speed Optimizer · share of sites in each country using one or the other
United States
1,010
2,475
India
159
1,230
United Kingdom
314
1,012
Canada
335
750
Germany
129
736
Australia
225
631
France
102
628
Italy
75
606
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bold Upsell | Booster Page Speed Optimizer |
|---|---|---|
| LCP | 1.5 s | 1.7 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 500 ms |
Median site's p75 values from the Chrome UX Report, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Bold Upsell to Booster Page Speed Optimizer
| Domain | When |
|---|---|
| oneaffirmation.com | Nov 2025 |
All Bold Upsell sites · All Booster Page Speed Optimizer sites