Global Web Mail Usage Statistics and Market Share
We are tracking usage statistics and market share of 7 web technologies in Web Mail. In April 2024 the most popular web technology in Web Mail is RoundCube with 70% market share. In second place there is SquirrelMail with 12% market share. After that there are Zimbra with 10%, Outlook Web App with 3% and RainLoop with 3% 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 4,552 websites using Web Mail in out database.
Web Mail Usage Statistics and Market Share in April 2024
#1 RoundCube 
69.73%
#2 SquirrelMail 
12.32%
#3 Zimbra 
9.60%
#4 Outlook Web App 
5.73%
#5 RainLoop 
2.50%
#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 | June 2023 | July 2023 | August 2023 | September 2023 | October 2023 | November 2023 | December 2023 | January 2024 | February 2024 | March 2024 | April 2024 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| RoundCube | 68.25% | 68.58% | 68.74% | 68.83% | 68.88% | 68.87% | 68.93% | 69.06% | 69.11% | 69.54% | 69.73% |
| SquirrelMail | 13.15% | 13.04% | 12.93% | 12.94% | 12.83% | 12.85% | 12.81% | 12.86% | 12.84% | 12.35% | 12.32% |
| Zimbra | 9.98% | 9.78% | 9.81% | 9.78% | 9.78% | 9.79% | 9.76% | 9.77% | 9.75% | 9.76% | 9.60% |
| Outlook Web App | 5.90% | 5.91% | 5.85% | 5.77% | 5.81% | 5.78% | 5.79% | 5.67% | 5.65% | 5.70% | 5.73% |
| RainLoop | 2.61% | 2.59% | 2.56% | 2.56% | 2.59% | 2.61% | 2.59% | 2.54% | 2.54% | 2.54% | 2.50% |
| Sympa | 0.06% | 0.06% | 0.06% | 0.06% | 0.06% | 0.06% | 0.06% | 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% |