It is hard to look at Ribbit Mobile without comparing it to Google Voice. Just like Google Voice, Ribbit gives users a new phone number or they can use call forwarding to transfer calls from their mobile phones to Ribbit's platform. Ribbit Mobile also has quite a few features that Google doesn't offer, including the ability to make calls from within the browser.

More Features than Google Voice

As Ribbit Mobile is part of Ribbit's open VoIP platform, the service can even forward calls to your Skype, MSN or Google Talk account if you don't pick up your mobile phone. Whenever you miss a call or when a new voicemail arrives, Ribbit can also ping you by email, Skype, Google Talk or SMS. Through its partners, Ribbit offers widgets for popular start pages like iGoogle and social networks like Facebook and MySpace. Through these - as well as on the service's homepage - users can receive and place calls from their browsers. This is a feature that Google Voice doesn't offer yet.

GrandCentral, which Google bought and then transformed into Google Voice, offered some of the features that Ribbit Mobile now offers. Google dropped quite a few useful features like call chains from Google Voice's feature line-up, however.

Besides call chains, another nice feature of Ribbit Mobile is that you can choose which number will appear on your contacts' phones when you call, even if you are calling from your computer. Once you are on a call, you can also easily transfer calls from any device to another. Because of this, you can start a call in the web interface or iGoogle and then continue the call on your cell phone.

Just like Google Voice, Ribbit gives users the option to set up a new phone number for their Ribbit accounts. Users can search for a specific number and letter combination in these numbers. For now, Ribbit only offers numbers in select cities such as California and New York.

A service like Ribbit Mobile wouldn't be very useful as you couldn't easily import your contacts. Thankfully, users can import contacts from Plaxo and as an Outlook CSV file (Google Contacts can export an Outlook CSV file).

Caller ID 2.0

As Ribbit's CEO Ted Griggs and co-founder Crick Waters told us yesterday, the company wants users to look at Ribbit Mobile as a "personal customer relationship management (CRM) platform." To do so, Ribbit Mobile doesn't just display a caller's name and phone number. Users can also add notes to every call and connect their Ribbit address book with their Twitter, Facebook, LinkedIn and Flickr accounts. Through this, the Ribbit team noted, conversations can now take place within a context.

Voicemail Transcriptions

Ribbit offers two levels of voicemail transcriptions. Free accounts come with automated transcriptions. Users with professional accounts - which are free during the beta period - can also choose to have 'business-class' level transcriptions, where a human checks the computer-transcribed text and edits it.

Ribbit for Developers

Because Ribbit is an open platform, developers can use the service in their own applications. Ribbit already features five apps in its app store, including an SMS widget, an Adobe AIR app for checking voicemails and a conference widget. Ribbit also plans to launch its own mobile applications for the iPhone and Blackberry platforms soon. Developers are free to charge for their applications and Ribbit also offers a profit-sharing program where developers will be paid if users use their applications.

Joining the Beta

Ribbit will slowly scale the service up over the next few weeks. The company will hand out new accounts on a first come, first serve basis. You can sign up for an account here. All service levels are available for free during the beta period, though Ribbit plans to charge for the pro accounts later on.

After acquiring GrandCentral, Google continued to operate the old service, but didn't allow new users to sign up. Now, Google has announced that it will first port existing users over to Google Voice in the next couple of days, and will then open up Google Voice to new users.

Interface

The new interface will look a lot like Gmail, with your inbox, SMS messages, access to voicemail and other features in a sidebar on the left.

Making Calls

You can make calls directly from the Google Voice web interface. After you initiate the call, the service will actually first call your mobile phone or landline, and after that your call will be placed over Google's network.

Calls within the U.S. will remain free, and users can purchase credit to make international calls (we don't have information about the international rates yet, but we assume that they will be competitive with those that Skype currently offers).

Google Voice will also offer free conference calls.

Voicemail

The automated voicemail transcription feature looks like it will be one of the most useful functions of Google Voice. Transcriptions are fully automated and Google will mark passages in the text where the algorithm was not very confident about the transcription. Transcriptions will automatically appear in your inbox, but Google Voice can also email them to you, or even send you an SMS with the text.

Future Integration with Android?

We can't help but wonder if Google will integrate the voicemail and transcription service with Android as well. In this video, Google shows the mobile version of Google Voice in the browser on an Android phone, but we assume that Google will release a dedicated Google Voice app for Android in the future and maybe even make it an integral part of the Android experience (if the carriers allow Google to do so, that is).

Just What the Doctor Ordered

Google Voice looks like a clear winner to us. It takes the best features of GrandCentral and adds a number of important and interesting new features like SMS messaging and voicemail transcriptions. Clearly this is one of the most important products that Google has released in the last couple of months and we will post a more detailed review of the service once it becomes available to us.