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VoIPmonitor
What it is
VoIPmonitor is an open-source packet sniffer paired with a commercial web interface for monitoring, diagnosing, and recording VoIP and RTC calls. It reports MOS scores, jitter, packet loss, delay, and RTCP information. Recording covers calls and SIPREC sessions, with rules for retaining or deleting recordings. Diagnostic views include packet captures, SIP ladder diagrams, audio waveforms, spectral analysis, and TLS/SRTP decryption. Dashboards, OLAP analytics, scheduled reports, KPI alerts, and fraud-detection rules support ongoing analysis. Listed protocols include SIP, RTP, RTCP, SIPREC, SKINNY, MGCP, SS7, SCTP, WebRTC, Diameter, TCP, SSL, and TLS. The Linux sniffer is a static binary with x86, ARM 32-bit, and ARM 64-bit builds. Cloud CDR retention is 21 days, while PCAP remains on the customer server; the listed maximum is 2,000 channels. Cloud service starts at $22/mo for three channels, and on-premise service costs $45/mo for 10 channels.
For and against
For
- Reports MOS, jitter, packet loss, delay, and RTCP
- Includes packet captures and SIP ladder diagrams
- Provides dashboards, reports, alerts, and fraud rules
- Supports SIPREC recording and retention policies
- Support and deployment assistance are listed
Against
- No free plan
- Cloud CDR retention is 21 days
- Cloud plan is limited to 2,000 channels
- Runs as a Linux static binary
The verdict
VoIPmonitor combines detailed VoIP diagnostics, recording controls, analytics, and broad protocol support. Choose between cloud service from $22/mo and a $45/mo on-premise plan, according to deployment and retention needs.
Who it suits
It suits VoIP operators, call centres, enterprises, integrators, and managed service providers needing Linux-based call monitoring. Its tools also fit teams requiring recording controls, quality metrics, and protocol troubleshooting.
Plans and prices
Cloud 3 channels
3 channels · Full features · CDR retention 21 days · PCAP stays on your server
Read 3 Oct 2026 · voipmonitor.org
Cloud 3 channels
3 channels · Full features · CDR retention 21 days · PCAP stays on your server
Read 3 Oct 2026 · voipmonitor.org
On-Premise 10 channels
10 channels · Full features · 100% offline · Unlimited retention
Read 3 Oct 2026 · voipmonitor.org
On-Premise 10 channels
10 channels · Full features · 100% offline · Unlimited retention
Read 3 Oct 2026 · voipmonitor.org
On the record
- Analytics and alerts
- The GUI provides dashboards, OLAP analytics, scheduled reports, KPI alerts and fraud detection rules.voipmonitor.org · read 3 Oct 2026
- Call quality
- It reports call quality metrics including MOS, jitter, packet loss, delay and RTCP data.voipmonitor.org · read 3 Oct 2026
- Cloud data limits
- Cloud CDR retention is 21 days, PCAP stays on the customer server, and the listed maximum is 2,000 channels.voipmonitor.org · read 3 Oct 2026
- Company
- The maker says VoIPmonitor is developed and operated by Martin Vit as an independent software vendor based in the Czech Republic.voipmonitor.org · read 3 Oct 2026
- Compliance controls
- The site describes DTMF suppression and a pause/resume API to help prevent recording cardholder data, along with automated retention and deletion rules.voipmonitor.org · read 3 Oct 2026
- Deployment
- The sniffer is a static binary that runs on Linux, and the maker lists builds for x86, ARM 32-bit and ARM 64-bit.voipmonitor.org · read 3 Oct 2026
- Integrations
- The site lists compatibility with Kamailio, OpenSIPS, FreeSWITCH, Asterisk, Cisco, Avaya, Genesys, Mitel, AudioCodes, Ribbon and Oracle SBC.voipmonitor.org · read 3 Oct 2026
- Intended users
- The maker describes typical users as VoIP operators, call centres, enterprises, integrators and managed service providers.voipmonitor.org · read 3 Oct 2026
- Protocols
- Supported protocols listed include SIP, RTP, RTCP, SIPREC, SKINNY, MGCP, SS7, SCTP, WebRTC, Diameter, TCP, SSL and TLS.voipmonitor.org · read 3 Oct 2026
- Purpose
- VoIPmonitor is an open-source packet sniffer with a commercial web GUI for monitoring, troubleshooting and recording VoIP/RTC calls.voipmonitor.org · read 3 Oct 2026
- Recording
- The product supports call recording, SIPREC session recording and policy-based retention and deletion rules.voipmonitor.org · read 3 Oct 2026
- Support
- Support is included with the WEB GUI license, and the maker lists free deployment assistance.voipmonitor.org · read 3 Oct 2026
- Troubleshooting
- Its troubleshooting tools include packet captures, SIP ladder diagrams, audio waveforms, spectral analysis and TLS/SRTP decryption.voipmonitor.org · read 3 Oct 2026
