Uber tops the list as the largest taxi and limousine company globally, with a 12.75% market share, according to the latest research from The Business Research Company.

While "number one" can be measured by revenue, fleet size, or brand recognition, Uber remains the undisputed global leader in the ride-hailing and taxi industry as of 2026. Operating in over 70 countries and 10,000 cities, Uber's platform handles billions of trips annually. However, in terms of traditional, regulated taxi fleets, ComfortDelGro (headquartered in Singapore) is often cited as one of the world's largest and most sophisticated operators, with a massive presence across Asia, Australia, and the UK. In specific markets, other giants dominate, such as Didi Chuxing in China, which actually handles more daily rides than Uber due to the sheer scale of the Chinese population. If we define "number one" by iconic status and reliability, the London Black Cab (licensed through Transport for London) is frequently voted the best by travelers due to the rigorous "Knowledge" testing drivers must pass. Ultimately, Uber is the tech king, but the title of "best" often depends on whether you value a digital app or a professional, highly-trained chauffeur.