Yes, both 8x8 and Aircall offer a Free Trial.
8x8 is designed for Large Enterprises, Medium Business and Small Business.
Aircall is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for 8x8 Starts at $12/User/Month whereas for Aircall Starts at $30/User/Month.
Some top alternatives to 8x8 includes XCALLY, RingCentral Office, 3CX, ice Contact Center, VoiceIQ, RingCentral Contact Center, Vocantas Communicate, Squaretalk, i2x and RingCentral Engage Digital.
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.