Proton Mail vs RainLoop
Head-to-head usage across the sites we track.
Top sites by authority
Proton Mail · RainLoop · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
7
0
Open Page Rank 8+
47
0
Open Page Rank 7+
198
1
Open Page Rank 6+
418
2
Open Page Rank 5+
737
3
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 · RainLoop · share of sites in each country using one or the other
United States
6,185
35
United Kingdom
2,300
25
France
2,126
28
India
2,067
39
Germany
2,033
33
Canada
1,910
15
Netherlands
1,566
31
Spain
1,381
22
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Proton Mail | RainLoop |
|---|---|---|
| LCP | 1.7 s | 1.5 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 500 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.