| Feature | OnlineVoIPSolutions | Skype | Google Talk | Cisco | Dlink |
| Protocol /build | SIP / Open Protocol | Proprietary / Closed Protocol | Proprietary / Closed Protocol | Proprietary / Closed Protocol | SIP / Open Protocol |
| Architecture | Peer to peer | Not Peer to peer | Not Peer to peer | Peer to peer | Peer to peer |
| Capacity | Million Users | Million Users | Million Users | Limited | 100 |
| Security | Secure | Not secure (Because RTP Media traverse through their POP) | Not secure | Secure | Limited |
| Interception | Can be intercepted on Request | Can be intercepted on Request | Cannot intercepted | Cannot intercepted | Cannot intercepted |
| SIP Support | Yes | No | No | No | Yes |
| Bandwidth Utilization | Minimum | Maximum – Computers on Open Network, might be used as Super Nodes, consumes lot of B/W. | Moderate | Heavy bandwidth utilization | Moderate |
| Quality | Excellent | Good | Very good | Excellent | Good |
| IP-to-PSTN calling | Supported but legally Not allowed | Illegally supported | Not supported | Not Supported | Supported but legally Not Allowed |
| PSTN-to-IP calling | Supported but legally Not Allowed | Illegally supported | Not supported | Not Supported | Supported but legally Not Allowed |
| End Device | TE / Computer | Computer | Computer | TE / Computer | TE / Computer |
| Class 5 Feature | Supported | No feature | No feature | Supported | Supported |
| Video Conference | Supported | Not Supported | Not Supported | Supported | Supported |
| Video Multicasting | Supported | Not Supported | Not Supported | Not Supported | Not Supported |
| OutGoing Caller ID | Shown | Something like 0012432 | Shown | Shown | Shown |
| Emergency Dialing | Not Allowed | Not supported | Not supported | Not supported | Not Allowed |
| Power Dependant | Yes | Yes | Yes | Yes | Yes |
| Video On Demand | Yes | No | No | No | No |
| Tele Medicines | Yes | No | No | Yes | No |
| Monthly Charges apart from B/W | Monthly charges | Call out Monthly charges | Free | Free | Free |
| Installation Cost | Cost of TE / Free | Free | Free | Heavy (Uncomparable) | Hardware cost |