Google said in a blog post that it was extending free domestic calling through 2013.
It also touted its cheap rates for international calls, which start as low as two cents, CBS News reports. Googles Voice, which was officially launched in March 2009, allows users to make calls and send text messages via its online service.
The firm assigns a unique phone number to each member.
A Google Voice calling plugin was added to Gmail in August 2010 as an alternative to Skype.
The plugin lets people make calls to any mobile phone or landline via the Chat section in Gmail.
According to the report, the service is available for a slew of countries.