SIP Inspector compared
How SIP Inspector 7 differs from other SIP test tools.
SIP Inspector and SIPp
SIPp is free, fast and widely used. SIP Inspector is for the people who want a GUI, readable scenarios, media and reports without writing XML.
| SIP Inspector 7 | SIPp | |
|---|---|---|
| Graphical scenario editor | ✓ Yes | ✕ No, command line only |
| Scenario files | Plain text that reads like a call flow | XML |
| Windows | ✓ Native program | Through Cygwin |
| Wireshark capture to scenario | ✓ Built in (GUI and -pcap2scen) | Not built in |
| Ladder diagram of the calls | ✓ Live and in the HTML report | Not built in |
| RFC checks of every message | ✓ RFC 3261, 4566 and 3264 | Not built in |
| Reports | HTML, CSV, JUnit XML, JSON | Statistics files and logs |
| Pass or fail on ASR, response time, MOS | ✓ -gate with limits | Exit code from failed calls |
| Remote control | REST API, browser page, Prometheus | Commands over a UDP socket |
| Media | RTP from pcap, live speech (G.711, G.729), SRTP, H.264 video decoded and shown | RTP from pcap, RTP echo, RTP streaming |
| Price and support | One-time license per computer, support from the author | Free and open source (GPL), community support |
From the public documentation of SIPp (github.com/SIPp/sipp and sipp.readthedocs.io), October 2026. Found something that is out of date? Let us know.
Choose SIP Inspector when
you want to build and debug a call flow by looking at it, test media (speech, SRTP, video), turn a capture into a test, or hand a CI server reports and a pass/fail decision on real numbers.
Choose SIPp when
you need a free tool, you are at home with XML and the command line, and you only run on Linux or macOS. It is a great tool, and many SIP Inspector users know it well.
Other commercial tools
Tools such as StarTrinity SIP Tester run on Windows only and use their own scripts (CallXML); its licenses are priced per server, from $200 up to $19,000. SIP Inspector runs on Windows, Linux and macOS with one license per computer.