Global Web Mail Usage Statistics and Market Share
We are tracking usage statistics and market share of 7 web technologies in Web Mail. In February 2025 the most popular web technology in Web Mail is RoundCube with 71% market share. In second place there is SquirrelMail with 12% market share. After that there are Zimbra with 10%, Outlook Web App with 2% and RainLoop with 2% market share. Top 5 web technologies together have 97% market share. The remaining 2 web technologies in Web Mail have a combined market share of 3%.
About Web Mail
Web mail is an email client implemented as a web application running on a web server.
We are tracking 7 different technologies in Web Mail.
There are 4,498 websites using Web Mail in out database.
Web Mail Usage Statistics and Market Share in February 2025
#1 RoundCube
70.65%
#2 SquirrelMail
11.98%
#3 Zimbra
9.54%
#4 Outlook Web App
5.34%
#5 RainLoop
2.38%
#6 Sympa
0.07%
#7 CrossBox
0.04%
Technologies in Web Mail
RoundCube
RoundCube is free and open-source web-based IMAP email client.
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
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.
RainLoop
RainLoop is a web-based email client.
Sympa
Sympa is an open-source mailing list management (MLM) software.
CrossBox
CrossBox is a webmail client.
Web Mail Market Share History in Last 12 Months
Technology | April 2024 | May 2024 | June 2024 | July 2024 | August 2024 | September 2024 | October 2024 | November 2024 | December 2024 | January 2025 | February 2025 |
---|---|---|---|---|---|---|---|---|---|---|---|
RoundCube | 69.76% | 69.79% | 69.77% | 69.80% | 69.95% | 70.08% | 70.12% | 70.17% | 70.31% | 70.61% | 70.65% |
SquirrelMail | 12.29% | 12.28% | 12.29% | 12.28% | 12.24% | 12.18% | 12.11% | 12.11% | 12.12% | 12.04% | 11.98% |
Zimbra | 9.58% | 9.57% | 9.58% | 9.60% | 9.56% | 9.54% | 9.58% | 9.57% | 9.47% | 9.43% | 9.54% |
Outlook Web App | 5.76% | 5.74% | 5.73% | 5.70% | 5.66% | 5.57% | 5.55% | 5.51% | 5.44% | 5.41% | 5.34% |
RainLoop | 2.51% | 2.51% | 2.51% | 2.51% | 2.48% | 2.51% | 2.53% | 2.52% | 2.54% | 2.41% | 2.38% |
Sympa | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% | 0.07% |
CrossBox | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% | 0.04% |