You only need to sign in the first time, just after installation – you’ll also need connection to download the image. After that, it will work without an active internet connection . So, in other words, set it up with an working internet connection, and then you will be able to work even offline.
Read moreHow do I use Genymotion for personal use?
How to Run Android Apps on Windows 10 with Genymotion
Read moreIs Genymotion open source?
The best alternative is Android-x86, which is both free and Open Source . Other great apps like Genymotion are BlueStacks (Freemium), Anbox (Free, Open Source), Nox App Player (Free) and MEmu (Free).
Read more