- Empirix http://www.empirix.com
- GL Communications http://www.gl.com
- Inet Technologies http://www.inet.com
- Ixia
- Spirent Communications http://www.spirentcom.com
- PROTOS Test-Suite
- SIPP SIP test: Open Source SIP test tool
- SIP Forum Test Framework Open source
- Testing Technologies http://www.testingtech.com - SIP Test Suite
- Touchstone Technologies Powerful and Affordable VoIP Testing Solutions
- WinSIP - SIP Load/Feature/Function tester
- Win323 - H.323 Load/Feature/Function tester
- WinEyeQ - Voice and video monitoring and analysis tool
- VoIP TraceBuster (FREE and Professional Versions) - Protocol and media debug and analysis tool
- Ultralite Versions - Call Generation/Monitoring and Analysis from $495
- Valid8.com - the leading provider of SIP, Megaco, SIGTRAN conformance test solutions.
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