A Vienna chauffeur service is a car and driver reserved in advance at a fixed euro price, operated by a company holding the Austrian taxi Konzession issued by the Magistrat der Stadt Wien under the Gelegenheitsverkehrs-Gesetz 1996, with a driver who holds a Taxilenkerausweis. In Austria a chauffeur car and a taxi hold the same licence; what differs is how the trip is booked and priced. A RYDES booking, whether a Vienna airport transfer, an hourly car service in Vienna or a black car to a Ringstrasse hotel, fixes the vehicle class, pickup, destination and price before the day.
That fixed price is something Austrian law specifically allows. For a journey ordered in advance through a booking service, the operator may agree a price with you that cannot be exceeded, with no taximeter running. Inside Vienna the city sets a band around its regulated comparison fare, and the run to the airport in Schwechat leaves the city tariff altogether. A reserved Vienna car service quote already carries the 10 percent VAT, the motorway vignette and any short-stay charge at the airport, so the figure on the confirmation is the figure you pay.
The same booking reaches well past the Gürtel: the Vienna International Centre for UN, IAEA and OPEC business, Schönbrunn, Grinzing and Klosterneuburg, the spa town of Baden bei Wien, and the Danube valley around Dürnstein. The Vienna taxi alternative page compares the two, and corporate travel in Vienna adds central invoicing for delegations.