Outlook Web App vs SquirrelMail
Head-to-head usage across the sites we track.
Top sites by authority
Outlook Web App · SquirrelMail · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 8+
15
1
Open Page Rank 7+
37
2
Open Page Rank 6+
50
3
Open Page Rank 5+
68
5
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 · SquirrelMail · share of sites in each country using one or the other
United States
2,737
28
India
1,532
39
United Kingdom
1,378
18
Germany
1,246
27
Canada
1,160
14
France
1,097
19
Spain
998
16
Netherlands
953
14
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Outlook Web App | SquirrelMail |
|---|---|---|
| LCP | 1.7 s | 1.3 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 ms | 550 ms |
Median site's p75 values from the Chrome UX Report, Sep 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.