Like many cities, taxis play a major role in getting people around Paris. However getting a taxi in Paris can be quite a challenge. And with only 4000 cabs added since 1937, from 14k to 18K, if you’ve ever been standing on a deserted street at 2am, then you don’t need me to tell you what a relief it is to find a taxi when you need it.
Also, as far as I know, Paris is one of the only European cities where the meters start when you call the cab. So be aware that if calling in advance, there will already be a higher fare on the meter than what is normally there if you just hail one yourself. (The Lyria train has a service where they will have a cab waiting for you at the Gare de Lyon, which I once used and when I got in, I saw the meter already had €17 on it. The total fare was €24 so most of it was “waiting time. I do recommend using a driver or making arrangements to be picked up by a service or taxi if arriving at the Gare du Nord via the Eurostar as there can be huge lines for taxis there. But at the other stations, it’s usually not a problem.)
A couple of new services have started in Paris. One are shared cabs, where you split the fare with someone. I’m not sure if you’ll save all that much on a trip within the city, but going to the airport can cut the far almost by half. Another development are véhicules de tourisme avec chauffeur (VTC), or taxi-like vehicles with private drivers. The government is trying to impose a rule that if you use a non taxi chauffeur, they have to wait 15 minutes before picking you up. Here are a few other caveats to know about taking a taxi in Paris: