NetSim by Tetcos vs Common Open Research Emulator (CORE)

NetSim by Tetcos8.9Visit COCommon Open Research Emulator (CORE)8.5Visit

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

vs

CO Common Open Research Emulator (CORE) #8 in Network Simulation Software 8.5/10 Open source ✓ 3 of 3 features Visit CORE

• NetSim by Tetcos fits best

  Research-grade protocol and wireless simulation

• Common Open Research Emulator (CORE) fits best

  Linux-based real-time network emulation

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Side by side

Feature	NetSim by Tetcos 8.9/10 Visit ↗	COCommon Open Research Emulator (CORE) 8.5/10 Visit ↗
At a glance
Editor score	8.9	8.5
Ranking	#4 in Network Simulation Software	#8 in Network Simulation Software
Best for	Research-grade protocol and wireless simulation	Linux-based real-time network emulation
Pricing model	Free plan + paid	Free
Starting price	Free plan · pricing on request	Open source
Free plan	✓ (best)	Not checked yet
Free trial	—	—
Deployment	Desktop, Self-hosted	Self-hosted
Platforms	Windows	Linux
Support	Email, Phone, Tickets, Docs	Community, Docs
Features NetSim by Tetcos 3/3 · Common Open Research Emulator (CORE) 3/3
Real-time emulation	✓	✓
Hardware-in-the-loop	✓	✓
Automation API	✓	✓
Specs
Simulation model	Discrete-event	Emulation
Deployment options	Desktop	Not checked yet
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	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	Windows-based deployment limits platform flexibility Paid editions use contact-sales pricing Protocol source access applies to supported editions rather than the whole product	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	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 →	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 →

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

• 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

• 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 →
• COCommon 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 →