Cart Functionality vs SummerCart
Head-to-head usage across the sites we track.
Top sites by authority
Cart Functionality · SummerCart · 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
Cart Functionality · SummerCart · share of sites in each country using one or the other
United States
729,127
499
United Kingdom
237,218
98
India
207,181
67
Germany
193,696
77
France
180,639
60
Canada
165,082
194
Brazil
144,613
55
Spain
143,412
59
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Cart Functionality | SummerCart |
|---|---|---|
| LCP | 1.7 s | 1.4 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 600 ms |
Median site's p75 values from the Chrome UX Report, Sep 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.
Cart Functionality to SummerCart
| Domain | When |
|---|---|
| 919thebend.ca | Jan 2026 |
| krro.com | Dec 2025 |
| wnlc.com | Nov 2025 |
| 1053thebone.com | Oct 2025 |