Proton Mail vs SquirrelMail
Head-to-head usage across the sites we track.
Top sites by authority
Proton Mail · SquirrelMail · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
8
0
Open Page Rank 8+
51
1
Open Page Rank 7+
205
4
Open Page Rank 6+
433
5
Open Page Rank 5+
754
6
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Proton Mail · SquirrelMail · share of sites in each country using one or the other
United States
5,830
27
United Kingdom
2,125
16
India
1,985
39
Germany
1,938
24
France
1,914
15
Canada
1,752
14
Netherlands
1,445
12
Spain
1,321
15
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Proton Mail | SquirrelMail |
|---|---|---|
| LCP | 1.7 s | 1.4 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.