Webmail

These are the top Webmail technologies based on market share in 2026.

# Technology Websites tracked Market share
1
Microsoft 365
4,500,000
48%
2
Google Workspace
4,300,000
46%
3
Apple iCloud Mail
380,000
4%
4
RoundCube
65,000
0.7%
5
Proton Mail
63,000
0.7%
6
Outlook Web App
15,000
0.2%
7
Zimbra
5,700
0.06%
8
Open-Xchange App Suite
1,300
0.01%
9
Zadarma
1,000
0.01%
10
RainLoop
800
0.01%

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Websites in United Kingdom

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Websites in United States

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Companies with emails and phone numbers

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Top 5,000 websites by traffic

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Websites with a .com domain

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5,000 low-traffic websites

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