Suggestions appear as you type. Use the up and down arrows to choose one and Enter to open it.

This page's audience our own tag's counts — open to see them
–Visits
–Page views
–Clicks to vendors
–Time on page
–Reading now
Clicks to vendors, by tool
  • –
Top countries
  • –
Devices
  • –

– · visits, page views and clicks counted by our own tag, which counts more than our checked analytics; every figure rounded down · how we count

Head-to-head · Network Simulation Software

NetSim by Tetcos vs ns-3

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score NetSim by Tetcos #4 in Network Simulation Software 8.9/10 Free plan · pricing on request Free plan✓ 3 of 3 features Visit NetSim
ns-3 #6 in Network Simulation Software 8.7/10 Free plan Free plan✓ 2 of 3 features Visit ns-3

NetSim by Tetcos leads on 0 checks, ns-3 on 0, and 4 are even. Who comes out ahead on the 4 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreNetSim by Tetcos · 8.9/10
  • Free planboth
  • Most featuresNetSim by Tetcos · 3 of 3

NetSim by Tetcos scores higher on our rubric for network simulation software: 8.9 against 8.7 out of 10; our editors rank them #4 and #6.

NetSim by Tetcos is the better fit for research-grade protocol and wireless simulation. ns-3 is the better fit for open-source discrete-event research.

  • NetSim by Tetcos fits best

    Research-grade protocol and wireless simulation

  • ns-3 fits best

    Open-source discrete-event research

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature NetSim by Tetcos 8.9/10 Visit ↗ ns-3 8.7/10 Visit ↗
At a glance
Editor score 8.9 8.7
Ranking #4 in Network Simulation Software #6 in Network Simulation Software
Best for Research-grade protocol and wireless simulation Open-source discrete-event research
Pricing model Free plan + paid Free
Starting price Free plan · pricing on request Free plan
Free plan ✓ ✓
Free trial — —
Deployment Desktop, Self-hosted Desktop
Platforms Windows Windows, macOS, Linux
Support Email, Phone, Tickets, Docs Community, Docs
Integrations 4 integrations 4 integrations
Built for Small business, Mid-market, Enterprise Solo, Small business, Mid-market, Enterprise
Features NetSim by Tetcos 3/3 · ns-3 2/3
Real-time emulation ✓ ✓
Hardware-in-the-loop ✓ (best) Not checked yet
Automation API ✓ ✓
Specs
Simulation model Discrete-event Discrete-event
Deployment options Desktop Desktop
Documented node limit 100 nodes Not checked yet
Our review
Pros
  • Models 5G/6G, satellite, NTN, MANET, Wi-Fi, IoT, VANET, and SDN
  • Combines real-time emulation with hardware-in-the-loop integration
  • Supports Python, MATLAB, C source access, traces, dashboards, and batch automation
  • Free and open source for research and education
  • Broad wireless, IP, routing, mobility, and device models
  • Real-time, tracing, visualization, and MPI support
Cons
  • Windows-based deployment limits platform flexibility
  • Paid editions use contact-sales pricing
  • Protocol source access applies to supported editions rather than the whole product
  • Desktop deployment without a web interface
  • Scenario development uses C++ or Python programs
  • Integrations are limited to a focused set of tools
Our verdict

NetSim by Tetcos is a Windows-based packet-level, discrete-event network simulator and emulator for research, teaching, commercial industry, and defence work. It is suited to teams studying wired and wireless communication networks,…

Read the review →

ns-3 is a free, open-source discrete-event network simulator for Internet systems. It is aimed primarily at networking research and education, supporting models for IP and non-IP networks, wireless technologies, routing, applications,…

Read the review →
  1. NetSim by TetcosNetwork Simulation Software 8.9Free plan · pricing on request
  2. ns-3Network Simulation Software 8.7Free plan

Strengths and trade-offs

  • NetSim by Tetcos — where it wins

    • Models 5G/6G, satellite, NTN, MANET, Wi-Fi, IoT, VANET, and SDN
    • Combines real-time emulation with hardware-in-the-loop integration
    • Supports Python, MATLAB, C source access, traces, dashboards, and batch automation

    Where it doesn't

    • Windows-based deployment limits platform flexibility
    • Paid editions use contact-sales pricing
    • Protocol source access applies to supported editions rather than the whole product

  • ns-3 — where it wins

    • Free and open source for research and education
    • Broad wireless, IP, routing, mobility, and device models
    • Real-time, tracing, visualization, and MPI support

    Where it doesn't

    • Desktop deployment without a web interface
    • Scenario development uses C++ or Python programs
    • Integrations are limited to a focused set of tools
  • NetSim by Tetcos8.9/10 · Free plan · pricing on request

    A research-focused simulator for detailed wired, wireless, and emulated network studies.

    Visit NetSimFull verdict →
  • ns-38.7/10 · Free plan

    A free, research-focused simulator with broad network models and desktop-based workflows.

    Visit ns-3Full verdict →

More comparisons

All network simulation software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update