- Active Voice Corporation
 - Provides IP-based messaging products. - Ahserver Technology
- Offers Linux-based unified messaging and communications systems and support services.
- American Voice Mail
- Nationwide provider of voice mail service, auto attendant, unified messaging, follow-me, and email delivery of voice and fax messages.
- American Voicemail Network (AVN)
- Offers voicemail retrieval via the Internet, fax on demand, and fax back services.
- Avail Networks, Inc.
- Designs, develops, and markets next-generation multi-service access (MSA) systems delivering integrated data, voice, and video services over unified access networks.
- BuzMe
- Free Internet call waiting and voicemail.
- CallWave
- Receive faxes online or use the "Internet Answering Machine" software.
- CANBOX Technologies
- Developing communications technologies and services, including unified messaging and automated customer service systems.
- Canbox, Inc.
- Offers a web-based unified messaging platform allowing business to provide messaging from their site.
- Captaris, Inc.
- Provides business to business unified messaging through its CallXpress product line.
- Centrinity
- Provides FirstClass, which consists of tools for electronic collaboration and unified communictaions.
- Cisco Unity
- Offers information, technical documentation, and tools for Cisco Unity Unified Messaging system.
- Digital Mail Limited
- One number for Voice, Fax, EMail, and Web Pages. For travellers and small businesses.
- EasyLink Services
- Provider of services that power the exchange of information between enterprises, their trading communities, and their customers.
- Free Internet Answering Machines
- Offers online Internet answering and fax services.
- GadgetShack.com
- Distributors of gadgets such as wireless intercoms, wireless alarms, home intercoms, headsets, speaker phones, and remote car starters.
- Global Connect
- Provides web-based voice messaging and notification services throughout United States, Canada, and Puerto Rico.
- Grand Central
- One number for life. GrandCentral is a phone number tied to you, not to a device or a location.
- Greensboro Telecom Ltd.
- Distributor specialising in messaging and networking services, providing unified messaging, network, and enhancement solutions to workgroup, divisional, and corporate environments.
- Hotvoice Communications International
- Web-based unified communications and messaging service and network.
- innoport.com
- Allows faxes and voicemails to be converted to files and sent as attachments to email accounts.
- Instant Email Pagers
- Service that allows email to be instantly delivered to your existing pager or fax.
- iPost
- Universal messaging.
- iTelco Communications, Inc.
- Messaging, fax, conference call, and notifying features.
- j2 Global Communications
- Offers services for sending and receiving faxes and voice mail via email. Also provides email by phone, fax broadcasting, and conference calling.
- MJL Technology, Ltd.
- Manufactures multimedia messaging systems that support voice, data, and interactive voice response service.
- Mobius 1
- Offers unified messaging from e-mail, voice mail, and fax storage into one web-based Internet account. Includes personal 1-800 number with voice-to-text email retrieval and more.
- Navinmail.com
- Global voice messaging service that allows members to exchange voice messages globally by placing a local telephone call.
- NetNotify
- Telephony package functions as a personal notification and event reminder system for Internet Service Providers.
- onebox.com
- Users can send and retrieve voicemail from a computer or phone, and check email and fax by phone.
- OneCall
- Provider of enhanced unified messaging services for the real estate community, telecommuters, and other mobile professionals.
- Openwave Systems
- Provides wireless and wireline carriers, ISPs, portals, and broadband providers with software and services needed to build multi-network communications services for subscribers.
- Portico
- Speech-driven virtual assistant that acts as a single point of integration for critical information and communications.
- PrivCom
- Specialises in encrypted unified messaging.
- Segway Communications
- Nationwide provider of voice mail service, auto attendant, unified messaging, follow-me, and email delivery of voice and fax messages.
- Smart 800 Telephone Number
- Offers multiple voice mailboxes with forwarding, email, fax, and other functions. From Harcom Corporation.
- Smartvia
- Offering web-based services to individuals.
- Speedia Wireless
- Offers unified messaging and personalised content on web-enabled mobile phones, pagers, and PDAs.
- SuperOffices.com
- Collects voicemail, fax, and email messages into one inbox as well as conference calls, call forwarding, contact manager, and more.
- TeleBot
- Offers free unified messaging service.
- Telecox Limited
- Offers product with the capability to receive faxes and voice messages via email attachments.
- TeleMessage
- TeleMessage offers universal messaging products and services that enable service providers and enterprises to send, receive, and forward voice, text, and multimedia messages from any communication medium.
- TOPCALL Australia Pty Limited
- Offering Fax server and unified messaging solutions for SAP, GroupWise, Exchange, Notes, and broadcast. Also SMS, IVR, CTI, text-to-speech and all messaging applications.
- Tornado Electronic Messaging System
- Integrates e-mail, voice mail, faxing and paging into an inbox that can be accessed from a web-enabled computer, Web TV browser, or touch-tone telephone.
- uReach
- Provides unified communications solutions to wireless, wireline, and broadband service providers.
- Virtel
- Provides personal communication services designed for business professionals; includes unified messaging, cellular, calling card, and teleconferencing services.
- Virtual Office System
- Toll free unified messaging service featuring voicemail and email. Accessible by Web or phone.
- VoicemailOffice.com
- Offers a variety of voicemail services and local numbers for most major cities, as well as toll-free numbers.
- VoiceNation
- Provides local voice mail, unified messaging, virtual PBX, and related answering services for communities throughout the United States.
- Webley Systems
- Provides advanced technology through IP and SIP enabled, hosted, and premise based unified communications, unified messaging, conferencing, and voice portal technology.
- worldaddress.com
- Offers unified messaging service.
- XOIP
- Access to voice, fax, SMS, and email messages via GSM phones, the web, or email.
 Xpedite Singapore
- Services include email, fax, Internet, electronic bill presentment, email lists, and direct marketing.- Yac.com
- Provides managed and branded web based call management, conferencing, and fax to email to resellers without installing onsite equipment.
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