FREEDOM251

Freedom251 › IT & Infrastructure

Free and open first

Best Network Troubleshooting Software in 2026

Network troubleshooting software helps inspect network traffic, analyze paths, and check network conditions. Tools in this category run on Windows, Linux, macOS, the web, self-hosted deployments, or through an API.

  1. 1

    Wireshark

    Free plan Open source APILinuxMac+2

    Wireshark provides broad protocol inspection and analysis tools at no license fee, with both graphical and terminal interfaces.

    8.5 Free plan Visit site
  2. 2

    Fing Security

    Free plan AndroidAPIiPhone+5

    Fing combines device identification with router checks and camera scanning. The free tier is limited, and scheduled scans and continuous threat detection require a subscription.

    7.6 Free plan Visit site
  3. 3

    Colasoft Capsa

    Free plan Windows

    Capsa combines packet inspection, network diagnosis, security analysis, and reporting in a Windows desktop tool.

    7.3 Free plan · paid from $695 · 30-day trial Visit site
  4. 4

    Nmap

    Free plan LinuxMacSelf-hosted+1

    Nmap combines discovery and scanning functions with scripting and companion tools. It is free for end users, while commercial redistribution requires separate OEM licensing.

    7.3 Free plan Visit site
  5. 5

    PingPlotter

    Free plan APIiPhoneLinux+3

    PingPlotter provides desktop monitoring and a centralized Cloud option, with alerts and analysis for troubleshooting.

    7.1 Free plan · paid from $6.99/mo Visit site
  6. 6

    perfSONAR

    Free plan APILinuxSelf-hosted

    perfSONAR provides coordinated network measurement and data access for operators managing their own deployment. It is free to use, but maintaining nodes and test configuration is part of running it.

    7.0 Open source Visit site
  7. 7

    tcpdump

    Free plan LinuxMacWindows

    tcpdump offers free packet capture across a broad set of listed systems, with source builds available.

    6.9 Free plan Visit site
  8. 8

    SystemTrayMenu

    Free plan Windows

    Pick SystemTrayMenu if you want a free Windows launcher with nested menus, configurable search hotkeys, and portable use.

    6.6 Free plan Visit site
  9. 9

    CommView

    Free trial Windows

    CommView provides extensive packet and protocol analysis for Windows, including session reconstruction, alarms, decryption, and remote capture.

    6.1 30-day trial Visit site
  10. 10

    NetWatch

    Free plan LinuxMacWindows
    6.1 Free plan Visit site
  11. 11

    Network Doctor

    Free plan LinuxMacWindows
    6.1 Free plan Visit site
  12. 12

    NetScanTools Pro

    Free trial Windows

    NetScanTools Pro offers a wide set of diagnostic and security checks in a Windows application. Buyers should account for its desktop-only design, lack of CLI, and paid licensing.

    5.9 From $299 · 14-day trial Visit site
  13. 13

    Omnipeek

    Free trial WebWindows

    Consider Omnipeek if you need detailed packet analysis on Windows, including real-time alerts and tools for voice, video, and remote network troubleshooting.

    5.8 Pricing on request Visit site
  14. 14

    Glean Packets

    Paid Self-hostedWeb

    Glean Packets combines browser-based capture inspection with multi-node capture and analysis tools.

    5.7 Pricing on request Visit site
  15. 15

    VisualRoute

    Free trial WebWindows

    VisualRoute offers layered route visualization and diagnostics, from core traceroute views to distributed testing features.

    5.5 15-day trial Visit site
  16. 16

    NetAlly EtherScope nXG

    Paid Web
    4.4 Visit site
  17. 17

    GNV@AI

    Paid
    4.2 Pricing on request Visit site
  18. 18

    ThousandEyes Network Monitoring

    Paid Web
    3.9 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

Compare free plans, trial periods, open-source availability, and paid pricing. Also check packet capture, path analysis, deployment method, supported platforms, and device limits before choosing.

Questions

Which network troubleshooting tools have free plans?

Nmap, NetWatch, Network Doctor, and perfSONAR are listed as free. Fing Security and Colasoft Capsa list free plans.

Which products offer trials?

Colasoft Capsa and CommView list 30-day trials. NetScanTools Pro lists a 14-day trial.

Is open-source network troubleshooting software available?

Yes. Open-source code is offered by tools on this list; perfSONAR is listed as open source. Check licence terms before modifying or redistributing code.

What platforms are supported?

The category includes tools for Windows, Linux, macOS, and the web, plus self-hosted and API deployments. Check the platform field for the product you are considering.

What comparison factors matter besides price?

The list compares free plan, paid-from price, packet capture, path analysis, deployment, supported platforms, and device limit.

More in IT & Infrastructure