Outlook Web App vs Proton Mail
Head-to-head usage across the sites we track.
Top sites by authority
Outlook Web App · Proton Mail · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
8
Open Page Rank 8+
13
51
Open Page Rank 7+
32
205
Open Page Rank 6+
49
433
Open Page Rank 5+
67
754
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Outlook Web App · Proton Mail · share of sites in each country using one or the other
United States
2,704
5,830
India
1,547
1,985
United Kingdom
1,345
2,125
Germany
1,268
1,938
France
1,078
1,914
Canada
1,153
1,752
Netherlands
923
1,445
Spain
973
1,321
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Outlook Web App | Proton Mail |
|---|---|---|
| LCP | 1.7 s | 1.7 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 700 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.