A Ljubljana chauffeur service is private ground transport booked ahead at a fixed price in euros, carried out by an operator licensed for passenger transport in Slovenia under the Road Transport Act (Zakon o prevozih v cestnem prometu). You do not hail it and it does not run on a taximeter. Car, chauffeur and fare are agreed before the journey, whether that is a LJU airport transfer from Brnik, an hourly car service for a day at the lakes, or a black car to a meeting near the BTC.
What separates it from a taxi is predictability. A metered cab from the airport into town tends to come to about €35 to €45, and the figure only settles when the meter stops. A reserved Ljubljana car service fare is fixed when you book, and it already contains the 9.5 percent VAT on passenger transport and the Slovenian e-vignette needed on the motorways. For anyone weighing the two, the taxi alternative in Ljubljana page sets the costs side by side.
Most bookings here leave the city. LJU to Bled and LJU to Bohinj for the lakes, Ljubljana to Postojna for the caves, LJU to Piran for the Adriatic, and Julian Alps day trips through Kranjska Gora. For organisations sending people to Slovenia regularly, corporate travel adds central invoicing on the same vehicles, and the full list of private transfers and routes sits at the foot of this page.