With the largest fleet of cars they have the best coverage in Sofia, OK taxi have been around for over 25 years, but unfortunately 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 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!