K2 vs PWA
Head-to-head usage across the sites we track.
Top sites by authority
K2 · PWA · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
209
Open Page Rank 8+
14
3,783
Open Page Rank 7+
31
16,776
Open Page Rank 6+
41
33,347
Open Page Rank 5+
73
58,360
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
K2 · PWA · share of sites in each country using one or the other
United States
311
358,243
Germany
318
185,405
Brazil
100
181,749
India
120
176,225
United Kingdom
160
153,237
France
155
135,069
Italy
331
108,633
Canada
82
104,982
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | K2 | PWA |
|---|---|---|
| LCP | 1.9 s | 1.9 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 700 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.
K2 to PWA
| Domain | When |
|---|---|
| svtheofan.ru | Oct 2026 |
| fairclothreynolds.com.au | Jul 2026 |
| remaildoccia.it | Apr 2026 |
| twobgyn.com | Nov 2025 |