Yes, both 8x8 and RingCentral Office offer a Free Trial.
8x8 is designed for Large Enterprises, Medium Business and Small Business.
RingCentral Office is designed for Large Enterprises, Medium Business and Small Business.
Pricing for 8x8 Starts at $12/User/Month whereas for RingCentral Office Starts at $19.99/User/Month when Billed Yearly.
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 RingCentral Office includes RingByName, VoIPstudio, Vonage Business, 3CX, 4PSA VoipNow, Infobip, Voxloud, MightyCall, Ringover, Voxbi and AT&T Office@Hand.