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+
8
0
Open Page Rank 8+
51
0
Open Page Rank 7+
205
2
Open Page Rank 6+
433
2
Open Page Rank 5+
754
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
5,830
26
United Kingdom
2,125
19
India
1,985
34
Germany
1,938
29
France
1,914
18
Canada
1,752
11
Netherlands
1,445
22
Spain
1,321
21
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, 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.