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OMNEST is the commercial version of OMNeT++, one of the most popular network simulation frameworks in academic and research communities. OMNeT++ is distributed under the Academic Public License that does not allow commercial use.

OMNEST and OMNeT++ are nearly identical, simulation models written for OMNeT++ are guaranteed to compile and run with OMNEST, and vice versa. Differences apply to licensing, packaging, and certain features only.

OMNeT++ OMNEST
License Academic Public License1 Commercial License
Commercial use not allowed1 allowed
Simulation kernel, tools, examples, documentation yes yes
Eclipse-based Simulation IDE yes yes
Support for all major operating systems2 yes yes
Windows installer no
(distributed as zip)
yes
Pre-compiled (and tested) simulation libraries for Windows no yes3
Support for Microsoft Visual C++ no yes
Support for the GCC Compiler4 yes yes
Documentation Generation
(example: INET)
yes
under Creative Commons5
yes
SVG Image Export6 no yes
SystemC Integration7 no yes
HLA Support8 no yes
Support informal, via the mailing list guaranteed 48-hour email support available
Service Releases informal guaranteed after significant fixes, but at least every 6 months
1 if you are unsure whether you need a commercial license, please check the Licensing FAQ
2 the IDE is supported on Linux, Mac OS X and Windows; the simulation kernel and models can be compiled on other platforms as well
3 for MinGW and recent versions of Visual C++
4 including MinGW on Windows
5 with OMNeT++, generated documentation is under the Creative Commons license. OMNEST does not contain this limitation.
6 for models and sequence charts
7 allows for mixing OMNEST and SystemC modules in the same simulation program
8 allows OMNEST simulations to join HLA (IEEE 1516) federates