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+
130
0
Open Page Rank 8+
2,162
74
Open Page Rank 7+
9,442
244
Open Page Rank 6+
18,214
384
Open Page Rank 5+
30,846
543
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
123,648
826
United Kingdom
46,237
538
Germany
42,654
722
India
38,675
646
Canada
33,719
289
France
25,203
530
Australia
24,001
183
Spain
21,743
474
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, 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.