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Nextiva offers Free Trial, but Sharpen does not.
Sharpen is designed for Large Enterprises, Medium Business and Small Business.
Nextiva is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Sharpen Starts at $5 whereas for Nextiva Starts at $18.95/User/Month when Billed Yearly.
Some top alternatives to Sharpen includes Nextiva, Claritysoft, Knowlarity, XCALLY, contactSPACE, uContact, HoduCC and Call Center Studio.
Some top alternatives to Nextiva includes uContact, Call Center Studio and OmniOMS Customer Communication Management Suite.