RoundCube

Category - Web Mail

Roundcube is a browser-based multilingual IMAP client with an application-like user interface.


We have discovered  36,311 live websites   are using RoundCube.

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Technology usage statistics

Websites using RoundCube:36,311 websites
Most popular in: United States
Market position in Web Mail category:#88
Market share in Web Mail:less than 0.1%
Most popular version:1.6.11

Security vulnerabilites

Top 10 most common security vulnerabilities associated with RoundCube
PublishedCVETitleDomains
Apr, 2026CVE-2026-35545An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking fea...15,187
Apr, 2026CVE-2026-35544An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style ...15,031
Apr, 2026CVE-2026-35543An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking fea...15,031
Apr, 2026CVE-2026-35542An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking fea...15,031
Apr, 2026CVE-2026-35541An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Incorrect password comparison...15,031
Apr, 2026CVE-2026-35539An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insuffi...15,031
Apr, 2026CVE-2026-35538An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsanitized IMAP SEARCH comma...15,031
Apr, 2026CVE-2026-35537An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Unsafe deserialization in the...15,031
Feb, 2026CVE-2026-26079Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13 allows Cascading Style Sheets (CSS) injection,...13,262
Feb, 2026CVE-2026-25916Roundcube Webmail before 1.5.13 and 1.6 before 1.6.13, when "Block remote images" is used, does not ...13,262

Technology adoption

Recent changes in RoundCube usage.
Websites that added RoundCube 2,120
Websites that dropped RoundCube 1,218
Websites that changed version of RoundCube  5,185

Available Reports


Technology Information


Major Versions

  • 1.xx (50 subversions, 15,311 domains)

Website Distribution by Country

Number of websites using RoundCube
United States11,277 websites


Germany3,572 websites
Brazil3,070 websites
France1,553 websites
GB1,108 websites
Poland943 websites
Spain853 websites
Italy846 websites
Netherlands827 websites
Canada696 websites

Website Distribution by TLD

Number of websites using RoundCube
.com11,624 websites
.com.br2,725 websites
.net2,698 websites
.org1,865 websites
.de1,165 websites
.it825 websites
.pl774 websites
.nl668 websites
.hu584 websites
.cz560 websites

RoundCube Versions

sorted by popularity
1.6.112,333 websites
1.6.122,177 websites
1.6.131,662 websites
1.4.111,470 websites
1.5.11746 websites
1.6.5703 websites
1.6.9634 websites
1.4.15629 websites
1.6.6351 websites
1.5.3311 websites

See all RoundCube versions ...

Top Websites Using RoundCube

A look at the most popular websites built with RoundCube
DomainCountryRankContacts
webmail-seguro.com.br Brazil6,842
roundcube.net United States20,309
webmail-logos.locaweb.com.br Brazil48,366
webmail.supremecluster.com United States51,080
mail.mirohost.net United States51,264
webbmail.loopia.se Sweden52,164
See full domain list

Always Used together


PHP: Total 21,079,878 domains found using PHP
Category - Programming Languages. 23,423,935 domains found using Programming Languages

Alternative Technologies


Google Workspace: Total 12,318,995 domains found using Google Workspace
Microsoft 365: Total 5,468,205 domains found using Microsoft 365
GoDaddy Email: Total 2,136,527 domains found using GoDaddy Email
Ionos Email: Total 1,579,103 domains found using Ionos Email
OVH Mail: Total 729,677 domains found using OVH Mail
Strato Email: Total 696,140 domains found using Strato Email
Hostgator Mail: Total 663,225 domains found using Hostgator Mail
MailChannels: Total 595,609 domains found using MailChannels
Zoho: Total 455,331 domains found using Zoho
Hostinger Mail: Total 452,594 domains found using Hostinger Mail

FAQ

RoundCube falls under the category of Web Mail.
WebTechSurvey systematically indexes websites and their technologies. Users can find websites using RoundCube through the WebTechSurvey platform.
There are currently 58,850,305 live websites that use RoundCube.
RoundCube holds less than 0.1% market share in the Web Mail category.
The main competitors to RoundCube include Google Workspace, Microsoft 365, GoDaddy Email, and Ionos Email.
RoundCube has a known security vulnerabilities: CVE-2026-48848, CVE-2026-48847, CVE-2026-48846, and CVE-2026-48845.