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Tessabyte Throughput Test: Same Spirit, New Muscles

  • Writer: Dan LANCaster
    Dan LANCaster
  • Aug 9
  • 5 min read

Updated: Sep 2

A network link is an opaque, multi-hop beast. We add transparency.

If you’ve been around networks long enough, you know the feeling: You set up your test gear, run your favorite throughput tool, stare at the chart, and think… “Well, that’s… something.”


For years, one of the best ways to measure that “something” was TamoSoft Throughput Test. It was dependable, straightforward, and it told you exactly what your network could (or couldn’t) deliver. It became the Swiss Army knife in countless engineers’ toolkits.


But here’s the thing: technology moves on, networks get faster, QoS policies get fancier, and our performance expectations climb higher than your neighbor’s Wi-Fi antenna. So when Netmantics LLC acquired the product in late 2024 and re-introduced it as Tessabyte Throughput Test, the goal wasn’t just a fresh coat of paint. It was about giving that trusted Swiss Army knife a few extra blades — and maybe a built-in laser pointer.


The Short Version


Tessabyte Throughput Test takes everything you liked about TamoSoft’s tool and adds new metrics, more control, smarter automation, and sharper reporting — all wrapped in a modern, cross-platform package.


Yes, it’s not free anymore (there’s a full 30-day trial to kick the tires), but if you care about accurate, repeatable, and insightful performance testing, it’s worth every penny.


Old Friend, New Tricks


Let’s be clear: the predecessor wasn’t broken. If you needed to test TCP or UDP throughput, measure packet loss, and see how your LAN or WLAN behaved under load, TamoSoft Throughput Test was great. Many of us relied on it for everything from basic Wi-Fi troubleshooting to validating big WAN upgrades.


What Tessabyte does is build on that solid base with features that respond to today’s networking challenges — jitter-sensitive applications, service-level agreements, QoS-aware networks, and, most importantly, faster networks. Yes, TamoSoft Throughput Test was not particularly good at testing fast networks with bandwidth exceeding 1 Gbps due to certain problems with its architecture and code. Anyway, let's see what Tessabyte has to offer.



1. Multi-Client Server Mode: More Clients, More Insight


Here’s something the old TamoSoft Throughput Test didn’t do: the Tessabyte server can accept multiple concurrent client connections.


Tessabyte server accepting multiple client connections over IPv4 and IPv6

That means you can:


  • Stress-test your network by simulating multiple endpoints sending and receiving data at the same time

  • See how bandwidth is divided when everyone jumps in at once

  • Observe how latency, jitter, and loss behave under shared load

  • Recreate real-world scenarios like conference-room Wi-Fi, office WAN usage, or a branch site hitting the ERP system all at once


Because the clients’ test cycles aren’t synchronized, you’ll see natural peaks and dips in throughput as different streams overlap — giving you a more realistic picture of network performance under contention.


And since all clients’ results are still collected individually, you can spot which segments or access points start struggling first.


2. Jitter: The Missing Puzzle Piece


Throughput and packet loss tell you a lot, but they don’t tell the whole story — especially for real-time applications like VoIP, video calls, or online gaming. That’s where jitter comes in: the variation in packet arrival times.


Tessabyte now measures jitter using the RFC 3550 method (yes, the “gold standard” way) and gives you real-time jitter charts alongside throughput, RTT, and loss:

Measuring jitter in a Wi-Fi network
Tessabyte measuring jitter in a Wi-Fi network


3. QoS/DSCP Tagging: Now with More Control


TamoSoft let you test with certain QoS types, but Tessabyte:


  • Lets you set any DSCP value (1–63), not just pre-defined ones

  • Shows platform-specific DSCP mappings for Windows, macOS, and Linux

  • Keeps all the familiar presets: Best Effort, Background, Excellent Effort, Audio/Video, Voice, Control


That means you can send packets that look exactly like the traffic you want to simulate — whether that’s a voice call tagged for AC-VO or a custom data stream tagged for a specific SLA.


4. Bitrate Limiting: Testing Without Flooding


Sometimes you don’t want to max out the link — you want to verify a Committed Information Rate or test at a certain ceiling to avoid disrupting other users.


Tessabyte’s new Limit rate option does exactly that:


  • Set the target rate

  • The app keeps throughput close to that target (within ~5%)

  • Perfect for SLA testing and polite in-office experiments


Set a rate limit to test SLA/CIR

5. Scheduling: Because Engineers Like to Sleep


Manually clicking “Start” at 3 a.m. is a young person’s game. Tessabyte lets you:


  • Create scheduled tasks with their own protocol, QoS, and bitrate settings

  • Run them daily, weekly, or in custom patterns

  • Generate HTML or CSV reports automatically


6. Payload Customization: Fine-Tuning Your Tests


Ever seen a TCP test spike above your link’s theoretical maximum? That’s often OS-level buffering. Tessabyte lets you fix that by:


  • Manually setting TCP chunk sizes large enough for accurate readings

  • Controlling UDP datagram size to test and avoid fragmentation


7. Reports That Don’t Look Like 2009


Tessabyte’s reports can now:

  • Use a dark theme (for both aesthetics and reduced glare during late-night troubleshooting)

  • Split tables by hour for easier reading

  • Show timestamps in local time, UTC, or any time zone you choose


8. Modern Platform Support & Deployment


We’re talking:


  • Windows 10/11, Server 2019/2022/2025

  • macOS Monterey through Sequoia/Tahoe

  • Linux Ubuntu, Debian, Fedora, Red Hat (server component)


Plus, for the server component:


  • Windows Service mode for unattended operation

  • Linux system daemon mode for unattended operation


In other words: run it anywhere, in almost any role, without having to babysit it.


Now, for the sake of fairness and clarity... TamoSoft Throughput Test used to offer client apps for iOS and Android, and that was awesome. At the time of writing (August 2025), Tessabyte for iOS and Tessabyte for Android are not yet available. Our aim is to launch them by the end of 2025.


It’s Not Free… But Here’s Why That’s OK


Yes, Tessabyte is a paid product. But you get:


  • A free 30-day trial — full-feature, no artificial limits

  • Engineering-grade accuracy and repeatability

  • Features that let you go beyond “speed tests” into actual performance validation


If your time is worth more than a few dollars an hour (and let’s face it, it is), Tessabyte pays for itself the first time it saves you from a mis-configured QoS policy, a broken SLA, or a finger-pointing war between network teams.


When to Use Tessabyte (and When Not To)


Use it when you need to:


  • Verify throughput and jitter for voice/video applications

  • Test QoS tags end-to-end in LAN/WLAN environments

  • Check SLA compliance with controlled bitrate

  • Run repeatable, scheduled tests for trend analysis

  • Simulate real-world traffic under controlled conditions


Don’t use it when you just want to:


  • See if your Netflix stream is “fast enough”

  • Compare ISPs for fun over your lunch break

  • Show off a gigabit speed on social media (unless you also want to graph it, timestamp it, and export it to CSV… in which case, welcome aboard)


Final Thoughts


Tessabyte Throughput Test isn’t a reinvention of the wheel — it’s a wheel with better tread, more grip, and a dashboard that tells you not just your speed, but how straight you’re rolling.

It keeps the simplicity that made TamoSoft Throughput Test a favorite, but layers on:


  • Jitter analysis

  • Advanced QoS/DSCP tagging

  • Bitrate limiting

  • Scheduling

  • Payload customization

  • Modern reporting

  • Cross-platform support


For network engineers, IT managers, and even curious sysadmins, that’s the difference between a quick snapshot and a full diagnostic toolkit.


So if you liked the old tool, you’ll love this one. And if you’ve never used either… well, the free trial is sitting right there.


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