Best Free VoIP Monitoring Software of 2025

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.

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.

ManageEngine OpManager acts as a dedicated monitoring solution for Voice over IP (VoIP) systems, delivering immediate insights into the effectiveness and quality of VoIP communications. It measures important performance indicators, including call clarity, delay, jitter, and packet loss, to maintain peak VoIP functionality. Offering proactive notifications and comprehensive reporting, OpManager empowers IT departments to swiftly detect and resolve VoIP-related challenges, ensuring uninterrupted communication. Its user-friendly dashboards and visualization tools facilitate the monitoring and evaluation of VoIP traffic, assisting organizations in sustaining superior voice communication standards.

Obkio is a simple Network Monitoring and Troubleshooting SaaS solution that allows users to continuously monitor the health of their network and core business applications to improve the end-user experience. Obkio identifies the cause of intermittent network problems, VoIP, video, and applications slowdown in seconds so you can troubleshoot before they affect your end-users. Deploy network monitoring Agents at strategic locations in a company's offices or network destinations such as data sites, remote sites, external client sites, or public or private clouds to continuously monitor performance using synthetic traffic exchanged every 500ms. Obkio continuously tests and measures network metrics, such as latency, jitter, packet loss, quality of service and customer experience via QoE (Quality of Experience). The app alerts you as soon as a problem occurs or even if there are signs that a failure is about to happen. Not only does it alert you and pinpoint the source of the issue, but it also allows you to go back in time to complete a diagnosis.

VoIP Detective is the most user-friendly Cisco Call Manager reporting tool. VoIP Detective is available in both a free and a paid version. It allows you to view calls to and fro extensions on your CUCM cluster as well as to perform detailed troubleshooting. VoIP Detective is a simple interface that allows you to send call information to Cisco Call Manager. VoIP Detective free and Pro can be quickly installed as virtual machines - it takes less than 30 minutes to get up and running.

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.