Yes, both Zingtree and Aircall offer a Free Trial.
Zingtree is designed for Medium Business and Small Business.
Aircall is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Zingtree Starts at $8/Month whereas for Aircall Starts at $30/User/Month.
Some top alternatives to Zingtree includes Nextiva, Dialer360, Call Center Studio, TelebuHub, Truly, Aircall, Ozonetel CloudAgent, ice Contact Center, ipSCAPE and LeadDesk.
Some top alternatives to Aircall includes Novanet Cloud Contact Center, CloudTalk, HoduCC, Call Center Studio, Dialpad Contact Center, 3CX, Vonage Contact Center and RingCentral Contact Center.