Updated: July 14, 2020 (September 12, 2005)
Charts & IllustrationsVoIP Services at a Glance
This chart compares some services that offer Voice over IP (VoIP) features to consumers in North America. User statistics are as reported by the companies except where noted.
| Service Name | Endpoints | Features | Price | Estimated Users |
| AOL Instant Messenger (AIM) | Client software (Windows, Mac, Linux) | Computer-to-computer voice and IM within the same network; testing video chat | Free | 53 million monthly users (ComScore) |
| AOL Internet Phone Service | Regular phone via cable/DSL adapter, PC client software | Incoming and outgoing PSTN, related services | $30/month plus $10/month AOL subscription (does not include broadband access) | Unknown but probably fewintroduced in Apr. 2005 |
| AT&T CallVantage | Regular phone via cable/DSL adapter | Incoming and outgoing PSTN, related services | $20 to $50/month plus per-minute charges for outgoing calls | 53,000 at end of 2004 |
| Cablevision Optimum Voice | Regular |
Atlas Members have full access
Get access to this and thousands of other unbiased analyses, roadmaps, decision kits, infographics, reference guides, and more, all included with membership. Comprehensive access to the most in-depth and unbiased expertise for Microsoft enterprise decision-making is waiting.
Membership OptionsAlready have an account? Login Now