GNS3 is a graphical network simulator that allows simulation of complex networks.


GNS3 is the most popular Windows, Mac & Linux alternative to Kathara.
GNS3 is the most popular Open Source & free alternative to Kathara.
- GNS3 is Free and Open Source
Kathara is described as 'Kathará is an open source container-based network emulation system for showing interactive demos/lessons, testing production networks in a sandbox environment, or developing new network protocols' and is an app in the development category. There are four alternatives to Kathara for a variety of platforms, including Windows, Linux, Mac, Android and iPhone apps. The best Kathara alternative is GNS3, which is both free and Open Source. Other great apps like Kathara are Cisco Packet Tracer, Eve-NG and NetSim.
GNS3 is a graphical network simulator that allows simulation of complex networks.


GNS3 is the most popular Windows, Mac & Linux alternative to Kathara.
GNS3 is the most popular Open Source & free alternative to Kathara.
Packet Tracer is an essential learning tool used in these Cisco Networking Academy courses: IT Essentials, CCNA Routing and Switching, CCNA Security, Intro to Internet of Things (IoT), and Mobility Fundamentals.




Cisco Packet Tracer is the most popular Android, iPhone, iPad & Android Tablet alternative to Kathara.
The new EVE-NG platform is ready for todays requirements. It allows enterprises, e-learning providers/centres, individuals and group collaborators to create virtual proof of concepts, solutions and training environments.




NetSim for CCNP Network Simulator is now updated to support the new ROUTE, SWITCH and TSHOOT technologies. The improved interface of NetSim for CCNP makes completing labs, compiling new labs and designing network topologies easier than ever before.

NetSim is the most popular commercial alternative to Kathara.