Hilton
Yes, both Zello and Voxer Business offer a Free Trial.
Zello is designed for Large Enterprises, Medium Business and Small Business.
Voxer Business is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zello Starts at $6.80/Month when Billed Yearly whereas for Voxer Business Starts at $6/User/Month.
Some top alternatives to Zello includes Dialog, Speakap, Talkie, Voiser, Let's Talk, Qualified, Voxer Business, Workvivo, ZEGOCLOUD, Distributed and TapTalk.io.
Some top alternatives to Voxer Business includes Voximplant, Talkie, Voxloud, Biptt, Qualified, VoiceLine, Zello, Workvivo, ZEGOCLOUD, Vox, TapTalk.io and IFTTT.