: Unlike subscription models, you own the license forever once purchased. You can always use the version you bought, even if you don't renew maintenance. Cloud & Network Licensing
If you just need to test the software, do not look for a key. Download the official trial from Labcenter. It is fully functional for 30 days. After that, you must purchase a key or uninstall it.
Proteus uses a proprietary licensing system that varies based on the user's needs:
Discounted versions available for students and academic institutions to aid in learning electronics and microcontroller programming. Lite/Trial Version: