Apple iCloud Mail vs RoundCube
Head-to-head usage across the sites we track.
Top sites by authority
Apple iCloud Mail · RoundCube · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
126
0
Open Page Rank 8+
2,135
73
Open Page Rank 7+
9,283
243
Open Page Rank 6+
17,844
378
Open Page Rank 5+
30,151
544
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Apple iCloud Mail · RoundCube · share of sites in each country using one or the other
United States
129,767
917
United Kingdom
50,050
583
Germany
46,068
827
India
42,601
690
Canada
36,709
313
France
29,018
597
Australia
26,471
201
Netherlands
23,412
525
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Apple iCloud Mail | RoundCube |
|---|---|---|
| LCP | 1.7 s | 1.5 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 600 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.