Best Free VoIP Monitoring Software of 2026

OpManager is the ideal end-to-end network monitoring tool for your organization's network. With OpManager, you can keep a close eye on health, performance, and availability levels of all network devices. This includes monitoring switches, routers, LANs, WLCs, IP addresses and firewalls. Insights into your hardware health and performance; monitor CPU, memory, temperature, disk usage, and more to improve efficiency. Seamlessly manage faults and alerts with instant notifications and detailed logs. Streamlined workflows facilitate easy set-up to execute quick diagnosis and corrective measures. The solution also comes with powerful visualization tools such as business views, 3d data center views, topology maps, heat maps, and customizable dashboards. Get proactive in capacity planning and decision-making with over 250 predefined reports covering all important metrics and areas in your network. Overall, OpManager's detailed management capabilities make it the ideal solution for IT administrators to achieve network resiliency and efficiency.

Paessler PRTG is an all-inclusive monitoring solution with an intuitive, user-friendly interface powered by a cutting-edge monitoring engine. It optimizes connections and workloads, reduces operational costs, and prevents outages. It also saves time and controls service level agreements (SLAs). This solution includes specialized monitoring features such as flexible alerting, cluster failover, distributed monitoring, maps, dashboards, and in-depth reporting.

Site24x7 provides unified cloud monitoring to support IT operations and DevOps within small and large organizations. The solution monitors real users' experiences on websites and apps from both desktop and mobile devices. DevOps teams can monitor and troubleshoot applications and servers, as well as network infrastructure, including private clouds and public clouds, with in-depth monitoring capabilities. Monitoring the end-user experience is done from more 100 locations around the globe and via various wireless carriers.

IT teams, MSPs, and network engineers use Obkio to gain complete visibility into network performance, whether it's happening in the office, across a hybrid workforce, or in the cloud. Obkio is a Network Performance Monitoring (NPM), observability, and diagnostics platform that works by deploying lightweight monitoring agents at any location, with no special hardware required. These agents continuously measure latency, jitter, packet loss, and bandwidth, while running Visual Traceroutes to map performance across the full network path. The platform covers SD-WAN, MPLS, and VoIP/UC monitoring, along with visibility into multi-site and distributed networks. Application performance monitoring (APM) rounds out the picture with HTTP, Web, and Teams-based synthetic tests. A standout feature, Obkio Insight, automates root-cause diagnostics, quickly showing whether a problem sits within the internal network, with an ISP, or with a third-party provider, backed by concrete performance data. Because it deploys in minutes, Obkio gives teams fast answers instead of raw data to sift through. The result: less time troubleshooting, stronger SLA validation, and clear proof of whether the network performance they're paying for matches what they're actually getting.

See exactly who's calling, who's answering, and how your phone system is performing — without wrestling with raw CDRs or clunky built-in tools. VoIP Detective turns the call data from Cisco CallManager (CUCM), Cisco CUBE, Webex Calling, and Microsoft Teams into clear, searchable reports that anyone on your team can use. Because it installs as a virtual machine inside your own environment, your call records stay on your infrastructure — nothing is shipped off to a vendor cloud. Most teams have it deployed and pulling reports within half an hour. Managers can run their own team and call-activity reports without help from IT, while administrators get the depth they need: inbound, outbound, and hunt-group reporting (including who answered and which calls were abandoned), busy-hour analysis for staffing, network-quality troubleshooting by jitter, latency, and packet loss, gateway capacity planning, and endpoint utilization to reclaim unused licenses. The free Lite edition never expires and places no limit on users or devices. VoIP Detective Pro unlocks unlimited data retention, scheduled report delivery, emergency-call alerts, GDPR phone-number masking, CUBE analytics, and a live UCCX wallboard — all at a single flat yearly rate that doesn't change with the size of your deployment.

Cisco ThousandEyes is an innovative platform for network intelligence that equips organizations with profound insights into digital interactions across various environments, including the internet, cloud, and enterprise networks. Utilizing sophisticated monitoring and analytics capabilities, ThousandEyes enables businesses to identify, troubleshoot, and rectify performance challenges that affect essential applications, websites, and services. Its extensive array of tools delivers valuable information regarding network performance, application delivery, and user engagement, allowing organizations to maintain uninterrupted connectivity and enhance user experiences. This platform is widely embraced by Fortune 500 companies and SaaS providers alike, establishing itself as a reliable solution for navigating the intricacies of contemporary hybrid and multi-cloud landscapes. Additionally, ThousandEyes empowers IT teams by equipping them with the tools needed to proactively manage, optimize, and refine their digital infrastructures for improved operational efficiency.

Wireshark stands as the leading and most widely utilized network protocol analyzer in the world. This tool allows users to observe the intricate details of their network activity and has become the standard reference point for various sectors, including commercial enterprises, non-profit organizations, government bodies, and academic institutions. The continued advancement of Wireshark is fueled by the voluntary efforts of networking specialists from around the world, originating from a project initiated by Gerald Combs in 1998. As a network protocol analyzer, Wireshark enables users to capture and explore the traffic traversing a computer network interactively. Known for its extensive and powerful capabilities, it is the most favored tool of its type globally. It operates seamlessly across a range of platforms, including Windows, macOS, Linux, and UNIX. Regularly employed by network professionals, security analysts, developers, and educators worldwide, it is accessible without cost as an open-source application and is distributed under the GNU General Public License version 2. Additionally, its community-driven development model ensures that it remains up-to-date with the latest networking technologies and trends.

SIP3 offers a comprehensive solution for the real-time oversight, analysis, and resolution of network performance issues, even under heavy traffic conditions. Enhance your customers' experience by providing flawless communication services regardless of your business's scale, as a positive customer experience significantly boosts your chances of achieving success. Keep an eye on live calls and address any issues promptly, ensuring you fulfill customer demands with immediate insights. With SIP3, you can expand your operations without compromising your data integrity, receiving critical information instantly regardless of your organization’s size. Maintain your focus and productivity through a streamlined, user-friendly interface that simplifies your tasks. The SIP3 OpenAPI allows for effortless integration with external platforms and solutions, ensuring that you remain at the forefront of your business while actively monitoring your VoIP network in real-time. Identify and rectify network issues before they escalate into service interruptions, safeguarding your operations. Additionally, track the essential KPIs that are vital for your business's growth, all while conserving your valuable time and resources. This innovative approach not only enhances efficiency but also positions your company for sustained success.

VoIP monitoring software that provides deep insight into WAN performance and critical call QoS metrics. SolarWinds®, VoIP & Network Quality Manager can help you monitor VoIP performance by analysing Call Detail Records generated from Cisco CallManager and Avaya Communication Manager. This will enable you to identify and eliminate distortions, latency and noise. VNQM allows you to easily analyze call detail files (CDRs) from Cisco and Avaya Communication Managers, and identify metrics such as latency and network jitter. You can also avoid packet delays in VoIP calls. SolarWinds VNQM offers a variety of powerful capabilities, including monitoring VoIP call quality of services (QoS), packet loss and latency, as well as monitoring site-tosite WAN performance with Cisco IP SLA technology. You can also correlate call issues with WAN performance to assist in troubleshooting.