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
217
Open Page Rank 8+
1
3,633
Open Page Rank 7+
1
17,286
Open Page Rank 6+
6
37,596
Open Page Rank 5+
17
73,412
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
488
1,284,004
India
118
592,975
United Kingdom
118
436,501
Brazil
27
418,679
Indonesia
28
328,375
Canada
154
321,328
Germany
61
316,957
Italy
38
305,727
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Buy with Prime | HTTP/3 |
|---|---|---|
| LCP | 1.9 s | 1.9 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 800 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.
Buy with Prime to HTTP/3
| Domain | When |
|---|---|
| hellowinx.com | Apr 2026 |
| californiadesignden.com | Apr 2026 |
HTTP/3 to Buy with Prime
| Domain | When |
|---|---|
| gritrgear.com | Sep 2025 |
| rununited.com | Sep 2025 |