Neither Grasshopper nor PBX Plus by 500apps offers a free trial.
Grasshopper is designed for and Small Business.
PBX Plus by 500apps is designed for Large Enterprises, Medium Business and Small Business.
The starting price of PBX Plus by 500apps begins at $9.99/Month when Billed Yearly, while pricing details for Grasshopper are unavailable.
Some top alternatives to Grasshopper includes CloudTalk, Dialpad Talk, VoIPstudio, Vonage Business, Vodia PBX, DYL Business Phone Service, Voxloud, MightyCall, Continent Telecom IP PBX, OpenPhone and MyOperator.
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.