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Ease-of-use
4.6
Customer Support
4.6
Value for money
4.6
Functionality
4.6
"We enjoy great call quality with SIP.US and have the flexibility to add and remove phone numbers and trunks at will. We can respond to market conditions instantly scaling up or down at will."
"We have utilized a number of providers and this provider is the most stable, responsive and reliable we have found."
"The service level has been outstanding, availability being something we take for granted. Their customer service and support are refreshingly effective, which can be rare with traditional telecom."
"When we had an 800 number, we had to pre-pay blocks of dollars for those calls. It was awkward from an accounting standpoint."
"Some providers in these countries seem to detect that our calls are Voip calls and block them. And we have raised this issue with SIP.us, but received no feedback."
"The servers were not kept up to date by provider as I was told they would be, so our software has fallen too far behind the current available branches to update."
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