| Feature | MagicJack | Vonage | Skype |
| Usable with your computer off | No | Yes | Yes (if you have a Skype phone) |
| Usable with a normal analog phone | Yes | Yes | No (unless you have an adapter; see comment #29 below) |
| Voicemail | Yes, will record a .wav file if your computer is on; you can’t call in for messages. | Yes | Yes (free with monthly plan, $20/year otherwise) |
| Video chat | No | No | Yes |
| Send & receive SMS text messages | No | No | Yes |
| Available to consumers outside the U.S.A. | No, but you can travel with the MagicJack and call into the U.S. and Canada | Can use it from anywhere but must have USA, UK or Canada billing & mailing address to sign up | Yes. Skype is the most international and travel-friendly of these three |
| Emergency 911 Calling | Yes | Yes | No |
| Keep your current land line phone number | No | Yes (usually) | No |
| Works with a dialup connection | Technically yes but dreadful quality | No | Yes, okay quality |
| Three way conference calling | Yes, but the 2 calls need to be inbound to you. | Yes | Yes (conference calls up to 9 people possible) |
| DTMF1 | Yes | Yes | Yes, through software 4.0 for the PC and 2.8 (beta) for the Mac |
| Automatic call forwarding (eg. to your cell phone) | No | Yes (free) | Yes (free with subscription) |
| Feature | MagicJack | Vonage | Skype |
1 DTMF is Dial Tone Multi-Frequency. This is what lets you type in numbers to an automated service, when you are asked to push “1″ for one option, “2″ for another, for example.