I had same issue around 10 months ago and decides to register normal LLC.
FIZ zones in Georgia do not work as smooth as they advertise. Georgian Law on FIZ is very ambiguous and does not state whether certain service is allowed to be provided by a FIZ company, there is a risk that Georgian Tax Authorities may require you to pay corporate income tax of 15%. Plus, you shall also take into consideration social income tax of 20% and social insurance tax of 4%
TBC Bank and Bank of Georgia does not provide its services to the companies registered in any FIZ of Georgia. I was told that Estonian or Armenian banks could be a solution, but you never know.
There is a risk you may end up with incorporating at FIZ without getting any bank account or tax benefits you need and you still have to pay incorporation fee plus license fee. So it’s s**t.
And whatever is said in previous post about Iranian control it’s true.