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
200
Open Page Rank 8+
15
3,769
Open Page Rank 7+
35
16,660
Open Page Rank 6+
43
33,166
Open Page Rank 5+
76
58,137
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
309
357,909
Germany
319
186,412
Brazil
102
178,007
India
120
172,788
United Kingdom
164
151,800
France
154
131,196
Italy
342
105,713
Canada
92
103,719
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, Aug 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 |
|---|---|
| fairclothreynolds.com.au | Jul 2026 |
| remaildoccia.it | Apr 2026 |
| twobgyn.com | Nov 2025 |