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+
129
0
Open Page Rank 8+
2,153
75
Open Page Rank 7+
9,391
237
Open Page Rank 6+
18,109
380
Open Page Rank 5+
30,668
540
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
122,210
790
United Kingdom
43,864
526
Germany
41,637
721
India
39,000
638
Canada
33,110
285
France
24,224
491
Australia
24,281
181
Netherlands
20,791
450
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, 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.