⚡ Webmail in the United Kingdom

Webmail software lets users access and manage email directly through a web browser.

The United Kingdom of Great Britain and Northern Ireland (UK) is a Western European country with a population of over 67 million people.

According to our statistics, webmail software is used on 0.02% of websites from the United Kingdom.

Statistics based on 183K+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the top webmail software in the United Kingdom in 2026, based on market share.

The most popular is Mailcow with a substantial share of 57.5%, followed by Roundcube with 30% and Outlook on the web with 12.5%.

Mailcow 57.5%
Roundcube 30%
Outlook on the web 12.5%

🚀 Highlights

Here is a list of the top solutions that is more popular in the United Kingdom than worldwide.
Differences between global and country rankings are shown in parentheses.

1. Mailcow ^(-2)

✨ Best Webmail Software

Below is a more detailed list of 3 webmail software solutions used on sites from the United Kingdom, ranked by their market share.

Rank	Name	Market share
1	Mailcow Willich, Germany An open-source groupware and email suite based on Docker. FreeOpen source	57.5%
2	Roundcube Stuttgart, Germany A browser-based multilingual IMAP client that provides full email access through a web interface with an application-like user experience. FreeOpen source$$$	30%
3	Outlook on the web Redmond, Washington, United States A web-based app included in Microsoft 365 that allows users to access their email, calendar, and contacts.	12.5%

👉 See Also

🌎 Webmail in other countries

🗃️ About This Data

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 183,628 websites from the United Kingdom.
We currently track the presence of 8 webmail software solutions across the web.
Of these, 3 were detected on websites from the United Kingdom.
Statistics were last calculated on September 9, 2026.
For more details, see our methodology and disclaimer.