NetSim

What NetSim is

NetSim is a browser-based network simulator for learning and practicing network configurations. It runs in the browser with WebAssembly and supports CLI practice for Cisco IOS, Huawei VRP, and Aruba AOS-CX. Its homepage lists 35+ labs from HCIA to HCIE levels. The Free plan costs $0.00 per free, billed at $0 forever, and includes 10 basic labs, up to 15 devices per topology, AI Copilot with your own key, and local storage only. Pro costs $15.00 per month, billed at $15 per month, and adds 35+ advanced labs, unlimited devices, included AI Copilot, cloud sync across devices, and priority support. Enterprise pricing is custom; listed features include SSO/SAML, an instructor dashboard, LTI-based LMS integration, custom lab creation, and dedicated support. NetSim Labs identifies itself as the maker. Configurations and lab progress stay local unless cloud sync is enabled. The core engine uses the AGPL v3 license, with commercial licenses available for organizations needing other terms.