Best GNS3 Alternatives & Competitors in 2025

Download Cisco Packet Tracer, an innovative network simulation and visualization tool used by Cisco Networking Academy students and instructors.

Key Cisco Packet Tracer features:

Free for Students Comprehensive Simulation Educational Tool Cross-Platform Compatibility

a discrete-event network simulator for internet systems.

Key ns-3 features:

Open Source Realistic Simulation Active Community Wide Range of Protocols

Open Source

Holistic service management: service, support + customer care. From Ticketing to Helpdesk, Service Desk, ITSM to Enterprise Service Management, Service Technician and Field Service Management (FSM)...

Key EcholoN features:

CMDB Offline App Workflow Engine

Try for free freemium €5000.0 / One-off (5 User)

NetSim software was created to simulate various Cisco systems. Cisco software is known around the world as being one of the best network, routing and switch systems for businesses and private use. Read more about NetSim.

Key NetSim features:

Comprehensive Lab Exercises Realistic Network Simulations Learning Mode and Skill Building Versatility

Paessler Multi Server Simulator is inexpensive and robust software that helps you power massive-scale testing.

Key Paessler Multi Server Simulator features:

Scalability Flexibility Ease of Use Cost-Effective

Mininet is a robust and inexpensive Instant Virtual Network designed to function on standard PCs like Laptops and Desktops.

Key Mininet features:

Ease of Use Cost-Effective Rapid Prototyping Scalability

Open Source

Simulation software to model, simulate, predict, and visualize systems in manufacturing, material handling, healthcare, warehousing, mining, etc.

Key FlexSim features:

User-Friendly Interface 3D Visualization Versatility Comprehensive Library

Verax Systems provides applications covering the entire IT & Telco service lifecycle from definition through provisioning and monitoring up to billing.

Key Free SNMP Agent Simulator features:

Cost Efficiency Ease of Use Network Testing

The new EVE-NG platform is ready for todays requirements.

Key Eve-NG features:

Multi-vendor Support Web-based GUI Scalability Collaboration

Dynamips is an emulator computer program that was written to emulate Cisco routers.

Key Dynamips features:

Open Source Cisco Hardware Emulation Integration with GNS3 Educational Tool

VNX is a simple, fast, and highly effective virtualization tool developed to assist you in creating virtual network testbeds automatically, resulting in time-saving.

Key VNX features:

Cost-effective virtualization Flexibility Educational Use Community Support

Cloonix is an open-source virtual network creation framework based on KVM licensed under the AGPLv3 license.

Key Cloonix features:

User-Friendly Interface Flexible Network Emulation Open Source Lightweight Solution

IMUNES is a cost-effective and efficient Integrated Multiprotocol Network Simulator/Emulator that functions as a tool for Linux and FreeBSD.

Key IMUNES features:

Versatile Network Emulation Real-time Operation Open Source Lightweight Virtualization

Cisco VIRL is a next-gen network virtualization and orchestration platform that enables you to accomplish multiple tasks like creating and customizing simulated networks with third-party and Cisco objects by means of a graphical utility.

Key Cisco VIRL features:

Realistic Network Simulations Comprehensive Device Support Scalability Educational Resources