OK Taxi is the official taxi operator for Sofia Airport, with offices in Arrivals at both terminals. Book your taxi from the office as there are still far too many rogue taxi drivers waiting for unsuspecting foreigners. With 1600 cars they have the best coverage in Sofia and have been around for over 25 years but they are also the most copied brand by unscrupulous drivers that will rip you off, leaving you under the impression that it was OK Taxi that cheated you. To be on the safe side ALWAYS use the OK desk at the airport and elsewhere use the phone to order your cab or ask the hotel reception. If your taxi has OK on it but the number is not 973 2121 - it is a fake cab whose sole purpose is to cheat YOU! Sadly the company does not yet have an app.