Hullo is the latest addition to Voip competitors. Where the american voip market is dominated by Vonage, the european market knows a different nr 1 : Skype. Where Skype works through a native client installed on your computer or portable device, Hullo is more like Jajah. On the website, you key in your number and the number of the person you want to call. Your phone starts ringing and voila, there's your call.
So what's the big difference that will make Hullo a true competitor ?

You can make a call from any normal phone or directly from your computer with speakers/headset and a microphone. You can also do group calling by dragging contacts into the call or adding a new phone number. If you need to switch phones, you can drop off the call and add your other number.

Hullo is also useful as a call forwarding device. They issue every user an extension on a normal phone number. When that number is called, Hullo will call your saved phone numbers in the order you tell it to, until it tracks you down.

That's nice. But will it beat the competition ? I don't think so. Where Hullo will track you down, you can take Skype with you using your mobile device. Where Skype is available for most platforms, Hullo is only available for Windows. So I can't give them a big chance. But hey, surprise me !