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
1,187
2,898
India
193
1,454
United Kingdom
375
1,178
Canada
417
849
Germany
149
869
Australia
249
753
France
119
771
Italy
87
702
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bold Upsell | Booster Page Speed Optimizer |
|---|---|---|
| LCP | 1.6 s | 1.8 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 500 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.
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