Slice vs Upserve
Head-to-head usage across the sites we track.
Top sites by authority
Slice · Upserve · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
1
1
Open Page Rank 8+
5
2
Open Page Rank 7+
6
2
Open Page Rank 6+
6
3
Open Page Rank 5+
7
4
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Slice · Upserve · share of sites in each country using one or the other
United States
4,861
934
Indonesia
75
19
Canada
20
13
United Kingdom
19
10
Spain
17
9
Malaysia
15
11
Mexico
16
9
India
15
10
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Slice | Upserve |
|---|---|---|
| LCP | 1.5 s | 1.3 s |
| INP | 100 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 400 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.