Neither PBX Plus by 500apps nor 3CX offers a free trial.
PBX Plus by 500apps is designed for Large Enterprises, Medium Business and Small Business.
3CX is designed for Large Enterprises, Medium Business and Small Business.
Pricing for PBX Plus by 500apps Starts at $9.99/Month when Billed Yearly whereas for 3CX Starts at $175/Year.
Some top alternatives to PBX Plus by 500apps includes CloudTalk, VoIPstudio, Vonage Business, Vodia PBX, 3CX, VoiceIQ, Voxloud, TR Cloud VoIP, MightyCall, Continent Telecom IP PBX and Comcast Business VoiceEdge.
Some top alternatives to 3CX includes uContact, Call Center Studio, RingCentral Office, Dialpad Contact Center, VCC Live, Avaya Aura, ice Contact Center, Vonage Contact Center, RingCentral Contact Center and RingCentral Engage Digital.