Jaxtr announces that its registered user base has reached 2,000,000 – up from 1,000,000 just 30 days ago. As a result, jaxtr has taken only a third of the time it took Skype in late 2003 to double its user base from one to two million. Unlike Skype, where phone calls are placed from a computer and require a download, jaxtr allows its users to enjoy the cost savings of VoIP from the convenience of any ordinary mobile or landline phone.

The company also announced receiving a $10 million round of financing led by August Capital and three of the early Skype investors – Draper Richards, Draper Fisher Jurvetson and Mangrove Capital. This investment underscores the belief among knowledgeable investors that the next generation of VoIP will be driven by the rapid adoption of mobile phones and that users generally prefer making calls from their mobile phone over initiating calls from their computer – and without any download.

Jaxtr has doubled its membership each month since the launch of its public service in March. Over 40,000 users now register per day to call friends and family overseas at the same cost and with the same convenience as calling a friend down the street. Jaxtr works with any phone in 220 countries, and no download is required.

1,300,000 of the 2,000,000 jaxtr users are in their 20’s. One of the attractions for users in this demographic is the ability to hear from people visiting their MySpace and Facebook profile even when they are off-online. From www.jaxtr.com, users simply click to add their jaxtr widget to their social networking pages. People visiting their profile can then click on their jaxtr widget and initiate a phone call – and the jaxtr user can receive this call without having to be online or needing to share their actual phone number.

“Business professionals can add their jaxtr link to their LinkedIn profile and receive phone calls in the same manner,” said jaxtr CEO Konstantin Guericke. Guericke was a co-founder of LinkedIn prior to joining jaxtr. “In addition to being able to receive phone calls without having to reveal one’s number, users gain greater control over incoming calls by posting their jaxtr link instead of their phone numbers online.”

For example, jaxtr users select which of their phones should ring when receiving a call. In addition, they control, on a caller-by-caller basis, whether a caller rings through to their phone, is only allowed to leave a voicemail message, or is blocked entirely. Jaxtr users can review voicemails they receive just like they check email messages in web-based email systems like Yahoo! Mail, Hotmail or Gmail.

In addition to providing extensive call-control services, jaxtr also enables people to call friends and family abroad without incurring international charges, even if placing the call from a mobile phone. Callers don’t need to register with jaxtr to call their friends, so in addition to jaxtr’s two million registered users, there are over a million more people who have made calls without registering for jaxtr.

Anyone can click on the jaxtr link of their friend and enter their number. Then, their phone rings, their friend's phone rings and jaxtr connects the call. By saving the local direct-dial number that jaxtr displays on their mobile and dialing it the next time they call their friend abroad, people can place calls directly from their mobile phone and bypass expensive international phone charges. No download or special phone is required. Users simply pick the person they want to call from the contact list on their mobile phone and hit the green call button to place a call.

There are more than three billion mobile phones in use today compared to fewer than one billion computers, of which only a fraction are voice-enabled and have high-bandwidth Internet connections. Jaxtr designed its communications service, so that calls can be initiated even from ordinary landline phones in order to build a service that can be far more broadly adopted than those relying on computers or proprietary telephony hardware.