Asterisk
An open source telephony switching and private branch exchange service. Allows peer-peer calling using a variety of voice over internet protocols.
Asylum Telecom
VoIP provider for business and residential customers. No service charges.
BroadVoice
VoIP provider offers full feature set with voice mail, caller ID, etc. Requires supplied broadband phone adapter.
CallDaddy
Pre-paid VOIP services. H.323 IP phone, gateway, gatekeeper, NetMeeting or any other H.323 compliant terminal necessary.
Calleveryone.com
A full featured VoIP/broadband phone to phone service primarily for calls within the US.
Callserve
PC-to-Phone service for outbound calls only. Software download required.
Calltower, Inc.
US-based B2B VoIP provider offers enterprise class hosted VOIP PBX Systems.
Dialpad Communications, Inc.
Offers monthly billing and pre-paid PC-to-Phone VoIP services. Also supports broadband telephone adapter for use without PC.
Dow Networks
Provides Voice over IP and telecom service to international clients.
Efonica
Prepaid system for PC-to-phone and web initiated phone-to-phone using VoIP.
Free World Dialup
Community network allowing calls to toll free numbers in the US, Japan, UK and Netherlands. Peer-peer calling to other members.
iConnectHere
Offers VoIP-based PC-to-Phone, Broadband Phone and Calling Card services.
IPCB.net
Softswitch services such as routing, billing as well as VoIP call termination.
My VoIP Store
Australian-based (Brisbane) VoIP consultant and B2C e-commerce site for VoIP hardware.
On Instant
PC-to-PC only isntant messaging service with VoIP features including live voice, voicemail and CRM tools.
One Unified Net
A communications infrastructure provider includes IP systems, services, softswitches, and phones.
Onramp Access
Provides business oriented VoIP services across fully managed T1 connections.
PingTone
Business VoIP provider geared toward companies deploying Cisco Systems IP Phones.
Redshift Networks
Operates and builds international carrier networks using VoIP and TDM circuit transmission technologies.
RhinoBell
PC to phone, phone to phone using device, voice over internet calls.
SCS Telecom GmbH
German-based B2B VOIP provider offers services to local call-shop owners and calling card telcos.
Skype
Peer to peer internet voice service. Mac, Windows and Linux versions available. Users may call landlines and cellphones for a fee; users may call each other for free.
Snaptel Communications
Offers pre-paid PC-to-Phone VoIP services worldwide. Uses Netmeeting.
Super Technologies, Inc
Offers flat-rate unlimited calling within USA & Canada. Uses analog telephone handsets via broadband telephone adapter.
Talafone
Canadian based provider of PC-to-phone and IP phone services and hardware.
Texas Instruments VoIP Solutions
B2B manufacturer of VoIP equipment including IP Phones, VoIP Gateways, High Density Gateways, voice-enabled Cable & DSL Modems.
Vinculum Communications
VoIP wholesale international termination services provider.
Vodawave
Residential and enterprise VoIP plans plus gateways, gatekeeper and billing software.
Voice over IP Calculator
Free VoIP resources, including online bandwidth calculators, white papers, books, a directory and a forum.
Voiceglo
VoIP service offering free and paid plans. Some plans require phone adapter or USB phone with an Internet-connected computer.
VoicePulse
VoIP service offering phone-to-phone with device. Various features and calling plans.
VoIP Providers List
Information exchange for VoIP partners offering minutes termination and origination, as well as hardware and software trade.
VoIPOnline
Voice-over-IP news, supplier directory and chatrooms for discussing related industry topics.
VoipXchange
B2B VoIP exchange platform for carriers to buy/sell excess capacity on VoIP networks covering call termination in 250+ countries. No-fee membership required.
Vonage
Provides voice over internet local dial-tone service. No PC required. Uses analog telephone with broadband telephone adapter.
WERCS Communications
US-based B2B VoIP telephony provider offering converged ip voice and data network services to customers in Wyoming and Rocky Mountain region.
WhistlerTel Inc.
US provider of broadband internet phone service and voice over IP (VoIP) solutions.
World On IP
Italy-based B2B VoIP provider offering hardware to set-up wireless VoIP networks.