Noleggiare is a fairly new Italian rental car company (founded in 2006). They have over 40 locations in Italy. I don’t know if they have ventured outside of Italy yet, They probably have lower price because they are trying to establish themselves in the market.
I looked at the reviews and they are mixed bag. 60% of them great, a bit less than 30% horrible, however I noticed that nearly all bad reviews are about charging people huge amounts for minor scratches after the rental return. Given these facts I would definitely rent through AutoEurope but with the zero deductible insurance clause (aka refundable excess), assuming it is offered if you select the Noleggiare.it deal. Many other bad reviews relate to the company charging people an admin fee for communicating the driver info to the police after receiving a fine. That is actually stsmdard practice with all rental companies in Italy and in Europe in general. If you incur into a violation, the police sends the ticket to the rental company owning the vehicle first and the company communicates the driver’s name to the police which then sends the ticket to the renter’s home. Rental companies charge 30€ to 60€ admin fee for that communication to the authorities.
Rental car company reviews here.
https://www.trustpilot.com/review/noleggiare.it