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
177
Open Page Rank 8+
0
3,999
Open Page Rank 7+
1
22,317
Open Page Rank 6+
1
52,959
Open Page Rank 5+
1
110,685
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
2
1,334,380
Germany
2
636,404
Japan
1
623,805
India
2
570,916
France
2
515,406
United Kingdom
2
482,093
Italy
1
440,575
Brazil
0
425,497
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Kotlin | PHP |
|---|---|---|
| LCP | 1.5 s | 2 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 400 ms | 900 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.