Webmail

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

# Technology Websites tracked Market share
1
Microsoft 365
1,700,000
46%
2
Google Workspace
1,600,000
45%
3
Apple iCloud Mail
210,000
6%
4
RoundCube
46,000
1%
5
Proton Mail
18,000
0.5%
6
Outlook Web App
10,000
0.3%
7
Zimbra
3,900
0.1%
8
Open-Xchange App Suite
880
0.02%
9
Zadarma
810
0.02%
10
RainLoop
490
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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