What are some alternatives?
When comparing Call Me Private and Grasshopper, you can also consider the following products
Line2 - Line2 adds a second phone number or complete cloud business phone system to smartphones & computers that's robust yet affordable. Buy online or get a custom quote.
RingCentral - RingCentral is the leading provider of cloud-based communications and collaboration solutions for small business and enterprise companies
YouMail - YouMail turns visual voicemail into a personal assistant for handling all your missed calls.
Nextiva - Business VoIP, cloud phone systems trusted by more than 150,000 companies. Powered by the leading cloud PBX VoIP platform, Nextiva is rated the best business VoIP service provider.
Truly Wireless - Wireless business phone system built for sales and support team.
Dialpad - Switch is a cloud-based phone system built for Google Apps users.