Web Mail Usage Statistics and Market Share in European Union (.eu)
We are tracking usage statistics and market share of 5 web technologies in Web Mail in European Union (.eu). In January 2025 the most popular web technology in Web Mail in European Union (.eu) is RoundCube with 69% market share. In second place there is Outlook Web App with 12% market share. After that there are SquirrelMail with 12%, Zimbra with 3% and RainLoop with 3% market share. Top 5 web technologies together have 99% market share. The remaining 0 web technologies in Web Mail have a combined market share of 1%. Global Web Mail market share report is available here.
About Web Mail
Web mail is an email client implemented as a web application running on a web server.
We are tracking 5 different technologies in Web Mail.
There are 68 websites using Web Mail in European Union (.eu websites) in out database.
Web Mail Usage Statistics and Market Share in European Union (.eu) in January 2025
#1 RoundCube 
69.12%
#2 Outlook Web App 
11.76%
#3 SquirrelMail 
11.76%
#4 Zimbra 
4.41%
#5 RainLoop 
2.94%
Technologies in Web Mail in European Union (.eu)
RoundCube
RoundCube is free and open-source web-based IMAP email client.
Outlook Web App
Outlook on the web is an information manager web app. It includes a web-based email client, a calendar tool, a contact manager, and a task manager.
SquirrelMail
SquirrelMail is an open-source web-mail package that is based on PHP language. It provides a web-based-email client and a proxy server for IMAP protocol.
Zimbra
RainLoop
RainLoop is a web-based email client.
Web Mail Market Share History in European Union (.eu) in Last 12 Months
| Technology | March 2024 | April 2024 | May 2024 | June 2024 | July 2024 | August 2024 | September 2024 | October 2024 | November 2024 | December 2024 | January 2025 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| RoundCube | 70.13% | 70.13% | 69.74% | 69.74% | 69.74% | 69.74% | 69.74% | 69.74% | 70.13% | 70.13% | 69.12% |
| SquirrelMail | 12.99% | 12.99% | 13.16% | 13.16% | 13.16% | 13.16% | 13.16% | 13.16% | 12.99% | 12.99% | 11.76% |
| Outlook Web App | 10.39% | 10.39% | 10.53% | 10.53% | 10.53% | 10.53% | 10.53% | 10.53% | 10.39% | 10.39% | 11.76% |
| Zimbra | 3.90% | 3.90% | 3.95% | 3.95% | 3.95% | 3.95% | 3.95% | 3.95% | 3.90% | 3.90% | 4.41% |
| RainLoop | 2.60% | 2.60% | 2.63% | 2.63% | 2.63% | 2.63% | 2.63% | 2.63% | 2.60% | 2.60% | 2.94% |