OpenPhone offers Free Trial, but Ring4 does not.
Ring4 is designed for Large Enterprises, Medium Business and Small Business.
OpenPhone is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Ring4 Starts at $9.99/Month whereas for OpenPhone Starts at $10/User/Month.
Some top alternatives to Ring4 includes RingByName, VoIPstudio, Vonage Business, PBX Plus by 500apps, Voxloud, iTeleCenter, MightyCall, Ringover, CloudPhone, OpenPhone and MyOperator.
Some top alternatives to OpenPhone includes Dialpad Talk, RingCentral Office, Vonage Business, Grasshopper, Dialpad Sell, Voxloud, Ringover, Qualified, VoiceLine, Workvivo and Simple Phones.