Here's a riddle for you: how come CallVantage is regularly ranked as the best VOIP service provider (the latest kudos come from PC World) but it gets nowhere near the buzz and, for that matter, customers as Vonage? It's not like CallVantage was late to the game or its prices were not competitive with Vonage. Perhaps it was CallVantage's association with AT&T. For early-adopters, why leave the ILEC world for VOIP only to sign for service from an ILEC? Maybe CallVantage didn't get enough love from AT&T CEO David Dorman, who was trying to transform the company into a big data network player before SBC came on the scene. For whatever reason, CallVantage doesn't seem to have much mojo. Maybe that will change once/if SBC starts to pay some serious attention to the VOIP market and CallVantage after the deal is approved by later this year or early 2006. Until then, CallVantage will likely continue to score high marks but its subscriber base will pale in comparison to its stature.
For some more thoughts on CallVantage, check out Andy Abramson, who uses the service and Vonage.