question

I am trying to make an informed decision on which eFax product is the best for Google. I am down to Ring Central and HelloFax. Though I like all the details of Ring Central, I cannot locate anywhere in which it is compatible with Google email (only find Outlook). I would prefer not to do HelloFax but it seems like it is the only eFax that allows some of the flexibility of RC but offers less features. However, it is compatible with Gmail. Any suggestions? Thanks!