A Copenhagen chauffeur service is private transport booked ahead at a price agreed before the trip, driven by an operator holding a Danish taxi licence (taxitilladelse) from Færdselsstyrelsen and sold through a licensed booking office. Denmark has had one licence for all paid car transport for up to nine people since the Taxiloven took effect on 1 January 2018, which means every legal chauffeur car here is, in law, a taxi. What makes it a chauffeur booking is that the car, the class and the fare are fixed in advance, whether it is a CPH airport transfer, an hourly car service in Copenhagen or a black car to a meeting in Indre By.
The practical difference is predictability. A metered taxi from the rank at Terminal 3 is honest and well regulated, but the number moves with traffic and the car is whichever one is next. A reserved Copenhagen car service booking fixes the vehicle class and the total before you land, and that total already counts any Øresund or Great Belt Bridge toll on the route plus the airport's charges. Danish passenger transport carries no VAT, so there is no tax line to add either. RYDES quotes in euros; your card is charged in euros.
The same booking reaches well past the city. Cruise port transfers from Oceankaj and Langelinie, Bella Center transfers during trade fairs, a Malmö transfer over the bridge, and the coast road north to North Zealand, Louisiana and Kronborg. For teams in Copenhagen every month, corporate travel in Copenhagen adds central invoicing on the same operators, and the full comparison with a metered fare sits on the Copenhagen taxi alternative page.