Kotlin vs PHP
Head-to-head usage across the sites we track.
Top sites by authority
Kotlin · PHP · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
175
Open Page Rank 8+
0
3,942
Open Page Rank 7+
1
21,829
Open Page Rank 6+
1
51,618
Open Page Rank 5+
1
107,665
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Kotlin · PHP · share of sites in each country using one or the other
United States
3
1,143,659
Germany
1
552,961
Japan
1
532,606
India
2
489,213
France
2
433,940
United Kingdom
2
415,974
Italy
1
392,415
Brazil
1
373,280
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Kotlin | PHP |
|---|---|---|
| LCP | 1.4 s | 2 s |
| INP | 75 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 400 ms | 1000 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.