Java vs Kotlin
Head-to-head usage across the sites we track.
Top sites by authority
Java · Kotlin · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
129
0
Open Page Rank 8+
2,282
0
Open Page Rank 7+
8,817
1
Open Page Rank 6+
15,329
1
Open Page Rank 5+
23,495
1
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Java · Kotlin · share of sites in each country using one or the other
United States
104,685
2
India
47,632
2
United Kingdom
34,317
2
Germany
34,304
1
Canada
30,484
3
Indonesia
29,625
0
Brazil
29,569
1
France
28,165
2
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Java | Kotlin |
|---|---|---|
| LCP | 1.9 s | 1.2 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 400 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.