OMNeT++

At a glance

• Editor score
  8.8 / 10
• Pricing
  Free plan · pricing on request
• Best for
  Mature academic and engineering simulation
• Free plan
  Yes
• Real-time emulation
  Yes
• Founded
  1997 · Budapest, Hungary
• Facts checked
  20 Sep 2026

• Where it wins

  • NED and C++ support hierarchical, modular network modeling
  • Desktop IDE plus graphical and command-line execution
  • Distributed, real-time, emulation and Python automation support

• Where it doesn't

  • Commercial use requires a commercial license
  • Commercial licensing is handled through OMNEST
  • The framework is more technical than narrow-purpose simulation tools

Our verdict on OMNeT++

OMNeT++ is an open-source, modular C++ simulation library and framework for building network simulators. Its discrete-event model supports wired and wireless networks, on-chip networks, queueing networks and other distributed systems. Academic and nonprofit users can work under the Academic Public License, while commercial use requires a commercial license. With Windows, macOS and Linux support, OMNeT++ fits universities, research groups and engineering teams that need a flexible foundation rather than a single-purpose modeling application.

The framework’s depth is its main strength. NED provides hierarchical network definitions, while C++ supports simulation module development. The Eclipse-based Simulation IDE brings modeling and analysis into a desktop environment, and users can also run simulations graphically or from the command line. Parallel distributed simulation extends the framework for larger or distributed workloads. Result analysis and visualization are included, alongside real-time simulation and network emulation extensions, including hardware-in-the-loop support. Python APIs and chart scripting add an automation path for analysis workflows.

Pricing and licensing deserve attention before adoption. Academic and nonprofit use has a defined licensing route, but commercial licensing is handled through the related OMNEST product and requires direct commercial licensing. That makes OMNeT++ a strong fit for mature academic and engineering simulation programs with the technical capacity to work in NED and C++, especially when broad modeling, distributed execution or real-time extensions matter. Teams seeking a simpler, narrowly focused simulator or a publicly posted commercial price may prefer a different option.

Your product? Our editors can test OMNeT++ in depth and publish a review, labelled as paid · from $149/mo →

OMNeT++ pricing

OMNeT++ fact sheet

Alternatives to OMNeT++

• GGNS3A free, broad multivendor lab for simulating, emulating, and connecting real networks.9.4
• CMCisco Modeling LabsA Cisco-focused virtual lab with broad automation, integration, and deployment options.9.2
• EVE-NGA broad emulation platform for large, collaborative multivendor network labs.9.0

See all OMNeT++ alternatives →

OMNeT++ vs the competition

• OGOMNeT++ vs GNS3
• OCMOMNeT++ vs Cisco Modeling Labs
• OOMNeT++ vs EVE-NG
• OOMNeT++ vs NetSim by Tetcos
• ONOMNeT++ vs ns-3
• OOMNeT++ vs Containerlab

Compare OMNeT++ with any tool side by side →

Featured on iTechGuides

OMNeT++ is listed in our Network Simulation Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update