Cart Functionality vs iPresta
Head-to-head usage across the sites we track.
Top sites by authority
Cart Functionality · iPresta · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
138
0
Open Page Rank 8+
2,470
0
Open Page Rank 7+
10,314
0
Open Page Rank 6+
20,555
0
Open Page Rank 5+
37,358
0
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Cart Functionality · iPresta · share of sites in each country using one or the other
United States
819,640
42
United Kingdom
265,245
21
India
226,526
2
Germany
217,355
55
France
207,855
17
Canada
188,032
11
Brazil
158,050
1
Italy
154,275
9
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cart Functionality | iPresta |
|---|---|---|
| LCP | 1.7 s | 2.8 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 1800 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.