It is possible to rent a car at some SIXT locations with a debit card and 2 forms of government-issued ID. It is best to check the payment policies with the branch before booking.
Add SIXT Connect to your rental and get Wi-Fi service for up to 5 devices. SIXT Connect Plus includes 60 minutes of local or international calling.
You can rent a car from the age of 21 at SIXT locations in the US. Drivers under 25 will be charged an underage driver fee. Some specialty and larger car categories require renters to be 25.