Buy with Prime vs HTTP/3
Head-to-head usage across the sites we track.
Top sites by authority
Buy with Prime · HTTP/3 · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
1
208
Open Page Rank 8+
1
3,600
Open Page Rank 7+
1
17,128
Open Page Rank 6+
4
37,410
Open Page Rank 5+
12
72,694
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Buy with Prime · HTTP/3 · share of sites in each country using one or the other
United States
384
1,131,734
India
85
527,436
Brazil
16
406,577
United Kingdom
92
387,761
Germany
42
290,259
Indonesia
21
286,606
Italy
26
282,554
Canada
123
278,439
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Buy with Prime | HTTP/3 |
|---|---|---|
| LCP | 1.7 s | 1.8 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 700 ms |
Median site's p75 values from the Chrome UX Report, Oct 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.
Buy with Prime to HTTP/3
| Domain | When |
|---|---|
| cosmedica-skincare.com | Jul 2026 |
| thehairdiagram.com | Jun 2026 |
| americanluxurygifts.com | May 2026 |
| californiadesignden.com | Apr 2026 |
| hellowinx.com | Apr 2026 |