A Zagreb chauffeur service is a private car and driver reserved in advance at a fixed price, with the journey carried out by an operator licensed for passenger transport in Croatia under the Road Transport Act, the Zakon o prijevozu u cestovnom prometu. RYDES takes the booking and agrees the price; the licensed operator supplies the vehicle and the chauffeur. Nothing is metered and nothing is hailed. A ZAG airport transfer, an hourly car service in Zagreb and a black car for a ministry meeting all work the same way: class, time and total are settled first.
That matters most on the days when the city does not behave. A pre-booked car service in Zagreb does not change its number when the Slavonska avenue jams, when Advent fills the Lower Town in December, or when a concert empties Arena Zagreb at eleven at night. The quote you accept already contains VAT and any motorway toll on the route, and it is charged in euros. If you are weighing it against a cab or an app ride, the line-by-line comparison is on Zagreb taxi alternative.
The same booking reaches well beyond the city limits. Zagreb sits where the motorways to Slovenia, the Kvarner coast and Dalmatia meet, so a chauffeur here often drives the first leg of a longer trip: ZAG to Plitvice, ZAG to Ljubljana, Zagreb to Rijeka or the full run to Split by road. Companies with regular visitors use corporate travel in Zagreb for one invoice and traveller profiles across every one of those routes.