Netmantics Tessabyte is worth a look if you need more than a basic internet speed test. Designed for network engineers and IT professionals, Tessabyte provides detailed performance testing for both wired and wireless networks. It measures important metrics such as TCP and UDP throughput, packet loss, jitter and round-trip time, giving you a much better picture of what is actually happening on the network. It was formerly known as TamoSoft Throughput Test before being acquired by Netmantics in 2024.
One of the biggest benefits of Tessabyte is that it can help turn a vague complaint like “the network is slow” into something you can actually troubleshoot. You can test individual links, measure network capacity, examine Wi-Fi performance and introduce traffic loads to see how the network behaves under congestion. That makes it useful for everything from troubleshooting an office LAN to validating a new wireless deployment or multi-gigabit network.
Tessabyte also goes beyond simply measuring bandwidth. Because it supports both TCP and UDP, network engineers can examine different aspects of network behavior, including packet loss and jitter. That can be particularly useful when troubleshooting applications such as VoIP, video conferencing and other latency-sensitive services. It also supports IPv4 and IPv6, along with configurable payloads and QoS testing, giving engineers more flexibility when building realistic test scenarios.
Another nice feature is the simple client-server architecture. Install the server on one system and the client on another, establish the connection and start testing. Tessabyte can also handle multiple clients, which opens the door to more realistic capacity and stress testing. It is available across Windows, macOS, iOS/iPadOS and Linux, while a Docker-based Tessabyte server is also available. That makes it relatively easy to drop into an existing network lab or troubleshooting toolkit.
For network professionals, perhaps the biggest advantage is having measurable evidence instead of relying on assumptions. Tessabyte can be used to benchmark equipment, validate firmware and hardware upgrades, test load balancing, verify QoS policies and help confirm SLA performance. It can also generate reports, making it easier to document test results and compare network performance before and after a change. And unlike many subscription-based tools, Netmantics offers a perpetual license model for the Windows and macOS clients, with the server available free of charge.
Bottom line: if you're already using tools such as iPerf3 but want a more polished, visual and multi-platform network performance testing experience, Tessabyte is definitely worth adding to your toolbox. It gives network engineers the ability to measure what the network is actually delivering rather than simply trusting link speeds or a browser-based speed test.
