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Head-to-head · Network Simulation Software

ns-3 vs Common Open Research Emulator (CORE)

  • Updated Oct 2026
  • Both researched from official sources
  • 4 checks side by side
Higher score ns-3 #6 in Network Simulation Software 8.7/10 Free plan Free plan✓ 2 of 3 features Visit ns-3
Common Open Research Emulator (CORE) #8 in Network Simulation Software 8.5/10 Open source ✓ 3 of 3 features Visit CORE

ns-3 leads on 0 checks, Common Open Research Emulator (CORE) 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 scorens-3 · 8.7/10
  • Free planonly ns-3
  • Most featuresCommon Open Research Emulator (CORE) · 3 of 3

ns-3 scores higher on our rubric for network simulation software: 8.7 against 8.5 out of 10; our editors rank them #6 and #8.

On simulation model, Common Open Research Emulator (CORE) gives you Emulation where ns-3 offers Discrete-event.

ns-3 is the better fit for open-source discrete-event research. Common Open Research Emulator (CORE) is the better fit for linux-based real-time network emulation.

  • ns-3 fits best

    Open-source discrete-event research

  • Common Open Research Emulator (CORE) fits best

    Linux-based real-time network emulation

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 ns-3 8.7/10 Visit ↗ Common Open Research Emulator (CORE) 8.5/10 Visit ↗
At a glance
Editor score 8.7 8.5
Ranking #6 in Network Simulation Software #8 in Network Simulation Software
Best for Open-source discrete-event research Linux-based real-time network emulation
Pricing model Free Free
Starting price Free plan Open source
Free plan ✓ (best) Not checked yet
Free trial — —
Deployment Desktop Self-hosted
Platforms Windows, macOS, Linux Linux
Support Community, Docs Community, Docs
Features ns-3 2/3 · Common Open Research Emulator (CORE) 3/3
Real-time emulation ✓ ✓
Hardware-in-the-loop Not checked yet ✓ (best)
Automation API ✓ ✓
Specs
Simulation model Discrete-event Emulation
Deployment options Desktop Not checked yet
Documented node limit Not checked yet Not checked yet
Our review
Pros
  • Free and open source for research and education
  • Broad wireless, IP, routing, mobility, and device models
  • Real-time, tracing, visualization, and MPI support
  • Real-time emulation with lightweight virtual nodes and Linux namespaces
  • Connects physical networks and hardware through physical interfaces
  • Python and gRPC APIs support programmable automation and distributed execution
Cons
  • Desktop deployment without a web interface
  • Scenario development uses C++ or Python programs
  • Integrations are limited to a focused set of tools
  • Linux-only platform coverage
  • Self-hosted deployment requires managing the software environment
  • Emulation-focused design may not fit users seeking other simulation models
Our verdict

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 →

Common Open Research Emulator (CORE) is free, open-source software for building and running emulated computer networks on Linux. It is aimed at network and protocol researchers, application testers, security teams, educators, and users…

Read the review →
  1. ns-3Network Simulation Software 8.7Free plan
  2. Common Open Research Emulator (CORE)Network Simulation Software 8.5Open source

Strengths and trade-offs

  • 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

  • Common Open Research Emulator (CORE) — where it wins

    • Real-time emulation with lightweight virtual nodes and Linux namespaces
    • Connects physical networks and hardware through physical interfaces
    • Python and gRPC APIs support programmable automation and distributed execution

    Where it doesn't

    • Linux-only platform coverage
    • Self-hosted deployment requires managing the software environment
    • Emulation-focused design may not fit users seeking other simulation models
  • ns-38.7/10 · Free plan

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

    Visit ns-3Full verdict →
  • Common Open Research Emulator (CORE)8.5/10 · Open source

    A flexible Linux emulator for topology design, protocol research, and hardware-in-the-loop work.

    Visit COREFull 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