VOIP phone software is a program which allows a user to log into a network or a service provider interface and then make and receive phone calls. This software in a sense acts as an interface between a user and his computer and guides the user towards achieving his needs.

There are various VOIP phone services that are available. Most of them are provided by the service providers and are typically programmed to be used on their particular platforms only and not across platforms.

One can compare VOIP phone software based on a large number of parameters. Some of these include basic product features offered by the service providers based on the features provided by the service providers.

Some of the service providers provide users with a 3 way calling and call waiting facility which a lot of other service providers do not provide. As such, the comparing product features gives us a prominent yardstick to compare the services.

As with any other service, the cost of acquiring the service plays an important role. When one goes on to compare the services provided, it is essential to compare the cost per feature. Many providers simply claim to provide a particular service and then provide some other service for free and charge exorbitant amounts for the features provided, which essentially means that they are overpricing their service. Therefore one should look into the services provided by such service providers and take an educated decision.

Apart from these factors, another important factor that needs to be taken into account is the facility provided by the service provider to keep your number as it is. This is of particular importance as you may feel the need to change your service provider and in that situation, if you are not allowed to retain your number, then you will have to undergo unnecessary troubles of informing family and friends your new address of your VOIP provider.