Nextiva offers Free Trial, but Who's Calling does not.
Who's Calling is designed for Large Enterprises, Medium Business and Small Business.
Nextiva is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Nextiva begins at $18.95/User/Month when Billed Yearly, while pricing details for Who's Calling are unavailable.
Some top alternatives to Who's Calling includes Nextiva, Call Metrics and Tracking Sales Calls.
Some top alternatives to Nextiva includes uContact, Call Center Studio and OmniOMS Customer Communication Management Suite.