CallingVault is described as 'Your personal number is not for everyone'. There are four alternatives to CallingVault, not only websites but also apps for Android and iPhone. The best alternative is Google Voice, which is free. Other great sites and apps similar to CallingVault are MightyCall (Paid), Phonebooth (Paid) and Globfone (Freemium).
Google Voice gives you one number for all your phones, voicemail organized in an email format, free US long distance calls, low rates on international calls, and many free calling features, including transcripts, call blocking, call screening, conference calling, SMS, and more.
MIGHTYCALL is the VoIP system designed for entrepreneurs and small business owners. With MightyCall small businesses can stay connected anywhere, as they are able to field calls on a range of devices, from cell phones to a desktop or desk phone.