| Adomo | | Offer voicemail, applications, and unified communications solutions that enable organizations to migrate to VoIP and wireless technologies. |
| Advanced Computer Software | | Produce Internet e-mail, fax and telex communications software, for all variants of Unix, Linux and Microsoft Windows 95/98. |
| Artix BroadsWord | | Voice, fax, email, pager, and SMS message broadcasting system for any type of users notification. |
| Avanquest UK | | Supplier of communication software solutions, offering expert advice and client support in the field of server based enterprise messaging. |
| Black Ice Software | | Messaging products, including voice and fax application development tools |
| blue-silicon | | Provides SunONE (iPlanet) based hosted email, voice mail, fax mail, SMS, calendar, and unified messaging solutions. |
| CenterSpan Communications Corporation | | Develops and markets internet software products based on three cutting-edge technologies developed for instant voice and text messaging and collaborative information sharing between users on different computers. (Nasdaq: CSCC). |
| CGI Systems | | Windows based fax, telex, email, IATA refiler server and client. Formerly known as Message Director. |
| CityComm | | Legally recognized method of sending an electronic message by either fax or electronic. |
| CorTec Europe | | Unifying all areas of business and communications in a simple zero-maintenance package. |
| Coteng | | Messaging solutions and software development |
| Despatches | | E-mail solutions from co-located and on-site mail servers to outsourced mail provision and feature rich hosted e-mail with webmail, SMS and fax options. |
| Esnatech | | Unified messaging solution provider |
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