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RoundCube is free and open-source web-based IMAP email client.
Disclaimer: The data used in this report is collected from the current VersionDB release (February 2026) containing a total of 12,727,168 domains. All statistics reflect this dataset and do not claim to represent all websites globally.
RoundCube Complementary Technologies
Technologies frequently found with RoundCube.
Live RoundCube Sites
981
Complementary Tech
66
Most Frequent Complementary Tech
Websites Using RoundCube
An unordered, non-ranked list generated from observed technology data.
| Domain | Server Location | ASN | Crawl Date |
|---|---|---|---|
| e2host.pl | 🇵🇱 Poland | Cyber_Folks S.A. | February 13, 2026 |
| thierfelder.eu | 🇩🇪 Germany | netcup GmbH | February 13, 2026 |
| houngkok.com.tw | 🇹🇼 Taiwan | New Century InfoComm Tech Co., Ltd. | February 13, 2026 |
| balibrands.com | 🇳🇱 Netherlands | CJ2 Hosting B.V. | February 13, 2026 |
| alliance-bokiau.com | 🇧🇪 Belgium | Wallonie Data Center SA | February 13, 2026 |
| synapselabs.com | 🇮🇳 India | Global India Tele-Infra Pvt Ltd | February 13, 2026 |
| purup.com | 🇩🇰 Denmark | FIBIA P/S | February 13, 2026 |
| drtechmanska.pl | 🇵🇱 Poland | Cyber_Folks S.A. | February 13, 2026 |
| bddzynl.com | 🇺🇸 United States | Tencent Building, Kejizhongyi Avenue | February 13, 2026 |
| wateringtech.com | 🇨🇦 Canada | OVH SAS | February 13, 2026 |
| yian.com.tw | 🇹🇼 Taiwan | Data Communication Business Group | February 13, 2026 |
| whitedns.eu | 🇩🇪 Germany | SpaceNet AG | February 13, 2026 |
| eurocaa.it | 🇮🇹 Italy | genesys informatica srl | February 13, 2026 |
| telemedia.hu | ðŸ‡ðŸ‡º Hungary | Magyar Telekom Plc. | February 13, 2026 |
| krakowski.pinb.gov.pl | 🇵🇱 Poland | OVH SAS | February 13, 2026 |
| kromsat.sk | 🇸🇰 Slovakia | ENERGOTEL a.s. | February 13, 2026 |
| amnesty-intern.de | 🇩🇪 Germany | Hetzner Online GmbH | February 13, 2026 |
| lenvolee-association.fr | 🇫🇷 France | Scaleway S.a.s. | February 13, 2026 |
| emailhost.us | 🇺🇸 United States | Psychz Networks | February 13, 2026 |
| duhocvinhtien.org | 🇻🇳 Vietnam | Quang Trung Software City Development Company | February 13, 2026 |
| atedin.hu | ðŸ‡ðŸ‡º Hungary | INTEGRITY Informatics Ltd. | February 13, 2026 |
| redline.paris | 🇫🇷 France | Scaleway S.a.s. | February 13, 2026 |
| webaway.dk | 🇩🇰 Denmark | Rackhosting.com ApS | February 13, 2026 |
| online.li | 🇱🇮 Liechtenstein | Hoi Internet AG | February 13, 2026 |
| mouvementperpetuel.com | 🇫🇷 France | Free SAS | February 13, 2026 |
| drushti.in | 🇺🇸 United States | Cloud South | February 13, 2026 |
| wattana.in.th | 🇹🇠Thailand | CS LOXINFO Public Company Limited. | February 13, 2026 |
| cest.gov.ba | 🇧🇦 Bosnia and Herzegovina | University of Sarajevo | February 13, 2026 |
| pcred.pl | 🇵🇱 Poland | sprint S.A. | February 13, 2026 |
| netfirms.com | 🇺🇸 United States | Newfold Digital, Inc. | February 13, 2026 |
| asue.am | 🇦🇲 Armenia | Ucom CJSC | February 13, 2026 |
| 91mail.shop | 🇸🇬 Singapore | Tencent Building, Kejizhongyi Avenue | February 13, 2026 |
| amthucdongnguyen.com.vn | 🇻🇳 Vietnam | Quang Trung Software City Development Company | February 13, 2026 |
| blue-byte.it | Unknown | Cloudflare, Inc. | February 13, 2026 |
| grevenaportal.gr | 🇬🇷 Greece | Combell NV | February 13, 2026 |
| der-fahrradladen.com | 🇩🇪 Germany | Hetzner Online GmbH | February 13, 2026 |
| espiasa.com.pe | 🇵🇪 Peru | America Movil Peru S.A.C. | February 13, 2026 |
| increator.cn | 🇨🇳 China | CHINA UNICOM China169 Backbone | February 13, 2026 |
| netrox.sk | 🇸🇰 Slovakia | Slovak Telekom, a.s. | February 13, 2026 |
| mastersgolf.co.uk | 🇬🇧 United Kingdom | Heart Internet limited | February 13, 2026 |
| alu.hr | 🇫🇷 France | velia.net Internetdienste GmbH | February 13, 2026 |
| vix.cz | 🇨🇿 Czech Republic | O2 Czech Republic, a.s. | February 13, 2026 |
| sngs.de | 🇩🇪 Germany | Hetzner Online GmbH | February 13, 2026 |
| turktvserial.icu | Unknown | Cloudflare, Inc. | February 13, 2026 |
| toaserver.de | 🇩🇪 Germany | Leaseweb Deutschland GmbH | February 6, 2026 |
| acupuncture-nantes.fr | 🇫🇷 France | OVH SAS | February 6, 2026 |
| jak.at | 🇦🇹 Austria | T-Mobile Austria GmbH | February 6, 2026 |
| ljj78.com | 🇺🇸 United States | Tencent Building, Kejizhongyi Avenue | February 6, 2026 |
| lamsinhtracvantay.net | 🇻🇳 Vietnam | Quang Trung Software City Development Company | February 6, 2026 |
| uniba.it | 🇮🇹 Italy | Consortium GARR | February 6, 2026 |
Find Your Customers By Their Technologies
12,727,168 domains across 3,651 technologies. Ready for lead generation, market research, and security analysis.
Buy Now — $199.95 USDTop RoundCube Identifiers
Who is using RoundCube and where.
Countries
Top 5 most detected countries for RoundCube
ASNs
Top 5 most detected ASNs for RoundCube
Languages
Top 5 most detected Languages for RoundCube
TLDs
Top 5 most detected TLDs for RoundCube
Most Frequent RoundCube Identifiers and Complementary Tech
Most frequently encountered identifiers for RoundCube and its complementary technologies.
| Technology | Sites |
|---|---|
| PHP | 981 |
| jQuery | 975 |
| jQuery UI | 964 |
| Bootstrap | 809 |
| Apache HTTP Server | 546 |
| Nginx | 342 |
| HSTS | 151 |
| OpenSSL | 123 |
| Debian | 107 |
| Windows Server | 88 |
| HTTP/3 | 63 |
| LiteSpeed | 49 |
| Ubuntu | 45 |
| Cloudflare | 33 |
| Cloudflare Browser Insights | 26 |
| CentOS | 13 |
| UNIX | 7 |
| Google PageSpeed | 7 |
| FreeBSD | 7 |
| Fedora | 6 |
| Python | 5 |
| IIS | 5 |
| LiteSpeed Cache | 5 |
| mod_jk | 4 |
| mod_wsgi | 4 |
| AlmaLinux | 4 |
| Apache Tomcat | 4 |
| MySQL | 3 |
| Perl | 3 |
| Varnish | 3 |
| Plesk | 3 |
| mod_perl | 3 |
| Google Analytics | 2 |
| WordPress | 2 |
| Google AdSense | 2 |
| jQuery Migrate | 2 |
| Subversion | 2 |
| Swiper | 2 |
| jsDelivr | 2 |
| Google Tag Manager | 2 |
| Elementor | 2 |
| XenForo | 1 |
| WP Rocket | 1 |
| jQuery CDN | 1 |
| Ruby | 1 |
| lighttpd | 1 |
| OneSignal | 1 |
| mod_ssl | 1 |
| AMP | 1 |
| OpenResty | 1 |
| Language | Sites |
|---|---|
| English | 810 |
| Afrikaans | 93 |
| German | 28 |
| Tagalog | 17 |
| Esperanto | 7 |
| Hungarian | 7 |
| Czech | 5 |
| Spanish | 5 |
| Croatian | 2 |
| Finnish | 2 |
| Dutch | 2 |
| Thai | 1 |
| French | 1 |
| Japanese | 1 |
| Russian | 1 |
| ASN | Sites |
|---|---|
| Hetzner Online GmbH | 78 |
| Tencent Building, Kejizhongyi Avenue | 73 |
| OVH SAS | 54 |
| IONOS SE | 34 |
| Cloudflare, Inc. | 33 |
| Cyber_Folks S.A. | 17 |
| Amazon.com, Inc. | 15 |
| Contabo GmbH | 15 |
| Heart Internet limited | 13 |
| Signet B.V. | 13 |
| Cloudie Limited | 11 |
| Akamai Connected Cloud | 11 |
| POPIDC powered by CSLoxinfo | 11 |
| DigitalOcean, LLC | 10 |
| netcup GmbH | 10 |
| Scaleway S.a.s. | 9 |
| Quang Trung Software City Development Company | 9 |
| Alibaba US Technology Co., Ltd. | 9 |
| New Century InfoComm Tech Co., Ltd. | 8 |
| EVEO S.A. | 8 |
| dogado GmbH | 6 |
| Awareness Software Limited | 6 |
| genesys informatica srl | 6 |
| CS LOXINFO Public Company Limited. | 6 |
| Data Communication Business Group | 6 |
| 453 Ladplacout Jorakhaebua | 5 |
| 4iG Telecommunications Holding Zrt | 5 |
| Axarnet Comunicaciones, S.l. | 5 |
| WHG Hosting Services Ltd | 5 |
| Leaseweb Deutschland GmbH | 5 |
| Interserver, Inc | 5 |
| National Telecom Public Company Limited | 5 |
| Aire Networks Del Mediterraneo Sl Unipersonal | 5 |
| KAGOYA JAPAN Inc. | 5 |
| VSHosting s.r.o. | 4 |
| MXroute LLC | 4 |
| Stichting DIGI NL | 4 |
| Ansluten Hosting i Sverige AB | 4 |
| LiquidNet US LLC | 4 |
| Strato GmbH | 4 |
| Proservice LLC | 4 |
| Host Europe GmbH | 4 |
| Rackforest Zrt. | 4 |
| Totaalnet Internet Works B.V. | 4 |
| Bangmod Enterprise | 3 |
| ODS Joint Stock Company | 3 |
| Host SpA | 3 |
| Digi Romania S.A. | 3 |
| Spartan Host Ltd | 3 |
| sprint S.A. | 3 |
| TLD | Sites |
|---|---|
| com | 245 |
| net | 66 |
| de | 58 |
| org | 37 |
| nl | 33 |
| it | 31 |
| pl | 29 |
| hu | 26 |
| eu | 23 |
| cz | 22 |
| com.br | 21 |
| es | 20 |
| co.uk | 16 |
| go.th | 16 |
| com.tw | 14 |
| info | 12 |
| sk | 9 |
| ru | 9 |
| fr | 8 |
| 8 | |
| dk | 8 |
| ca | 7 |
| top | 7 |
| gr | 7 |
| ch | 7 |
| pinb.gov.pl | 6 |
| cn | 6 |
| ro | 5 |
| in | 5 |
| org.uk | 5 |
| vn | 4 |
| se | 4 |
| com.ar | 4 |
| net.pl | 4 |
| co.th | 4 |
| cc | 4 |
| site | 4 |
| at | 4 |
| pr.gov.br | 4 |
| xyz | 3 |
| no | 3 |
| hr | 3 |
| online | 3 |
| com.pl | 3 |
| in.th | 3 |
| us | 3 |
| rs | 3 |
| co.za | 3 |
| lv | 3 |
| ac.ir | 3 |
| Country | Sites |
|---|---|
| 🇩🇪 Germany | 138 |
| 🇺🇸 United States | 138 |
| 🇫🇷 France | 80 |
| 🇳🇱 Netherlands | 41 |
| 🇵🇱 Poland | 40 |
| 🇹🇠Thailand | 37 |
| 🇬🇧 United Kingdom | 37 |
| 🇪🇸 Spain | 33 |
| 🇸🇬 Singapore | 32 |
| ðŸ‡ðŸ‡° Hong Kong | 30 |
| 🇨🇿 Czech Republic | 29 |
| ðŸ‡ðŸ‡º Hungary | 26 |
| 🇧🇷 Brazil | 26 |
| 🇮🇹 Italy | 21 |
| 🇻🇳 Vietnam | 19 |
| 🇨🇦 Canada | 17 |
| 🇹🇼 Taiwan | 16 |
| 🇫🇮 Finland | 15 |
| 🇷🇺 Russia | 13 |
| 🇨🇠Switzerland | 10 |
| 🇯🇵 Japan | 10 |
| 🇦🇹 Austria | 8 |
| 🇸🇰 Slovakia | 8 |
| 🇸🇪 Sweden | 6 |
| 🇮🇳 India | 6 |
| 🇩🇰 Denmark | 6 |
| 🇰🇷 South Korea | 6 |
| 🇨🇳 China | 6 |
| 🇦🇷 Argentina | 5 |
| 🇿🇦 South Africa | 5 |
| 🇧🇪 Belgium | 4 |
| 🇹🇷 Turkey | 4 |
| 🇬🇷 Greece | 4 |
| 🇱🇻 Latvia | 4 |
| 🇪🇪 Estonia | 4 |
| 🇬🇪 Georgia | 4 |
| 🇮🇷 Iran | 4 |
| 🇷🇸 Serbia | 3 |
| 🇳🇿 New Zealand | 3 |
| 🇮🇪 Ireland | 3 |
| 🇲🇽 Mexico | 3 |
| 🇳🇴 Norway | 3 |
| 🇵🇹 Portugal | 3 |
| ðŸ‡ðŸ‡· Croatia | 3 |
| 🇷🇴 Romania | 3 |
| 🇮🇩 Indonesia | 3 |
| 🇦🇺 Australia | 3 |
| 🇸🇾 Syria | 2 |
| 🇺🇦 Ukraine | 2 |
| 🇦🇲 Armenia | 2 |
| 🇮🇱 Israel | 2 |
| 🇺🇿 Uzbekistan | 2 |
| 🇵🇰 Pakistan | 2 |
| 🇧🇬 Bulgaria | 2 |
| 🇱🇹 Lithuania | 2 |
| 🇦🇿 Azerbaijan | 1 |
| 🇧🇦 Bosnia and Herzegovina | 1 |
| 🇵🇪 Peru | 1 |
| 🇧🇴 Bolivia | 1 |
| 🇸🇨 Seychelles | 1 |
| 🇲🇾 Malaysia | 1 |
| 🇱🇮 Liechtenstein | 1 |
| 🇰🇠Cambodia | 1 |
| 🇲🇩 Moldova | 1 |
| 🇧🇩 Bangladesh | 1 |