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
205
Open Page Rank 8+
16
3,752
Open Page Rank 7+
41
16,716
Open Page Rank 6+
50
33,308
Open Page Rank 5+
87
58,343
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
373
391,794
Germany
396
205,277
India
138
183,609
United Kingdom
184
168,139
Brazil
115
160,900
France
194
151,973
Italy
395
118,062
Canada
106
116,618
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, 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.
K2 to PWA
| Domain | When |
|---|---|
| remaildoccia.it | Apr 2026 |
| twobgyn.com | Nov 2025 |