HTTP/2 vs HTTP/3
Head-to-head usage across the sites we track.
Top sites by authority
HTTP/2 · HTTP/3 · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
217
Open Page Rank 8+
10
3,633
Open Page Rank 7+
52
17,286
Open Page Rank 6+
86
37,596
Open Page Rank 5+
166
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
HTTP/2 · HTTP/3 · share of sites in each country using one or the other
United States
202
1,284,004
India
472
592,975
United Kingdom
112
436,501
Brazil
308
418,679
Indonesia
42
328,375
Canada
70
321,328
Germany
643
316,957
Italy
48
305,727
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | HTTP/2 | HTTP/3 |
|---|---|---|
| LCP | 1.4 s | 1.9 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 600 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.
HTTP/2 to HTTP/3
| Domain | When |
|---|---|
| tavernkeeper.com | Dec 2025 |
| metalloinvest.com | Dec 2025 |
HTTP/3 to HTTP/2
| Domain | When |
|---|---|
| 1900.co.il | Dec 2025 |