What is Uber?
Uber Technologies Inc. is an American multinational online transportation network company headquartered in San Francisco, California. It develops, markets and operates the Uber mobile "app", which allows consumers with smart cell phones to submit a trip request, which the software program then automatically sends to the Uber driver nearest to the consumer, alerting the driver to the location of the customer. Uber drivers use their own personal cars. As of August 2016, the service was available in over 66 countries and 507 cities worldwide. The Uber app automatically calculates the fare and transfers the payment to the driver. Since Uber's launch, several other companies have replicated its business model, a trend that has come to be referred to as "Uberification."
What is a Taxi?
A taxicab, also known as a taxi or a cab, is a type of vehicle for hire or contract with a driver, used by a single passenger or small group of passengers. A taxicab transports passengers between locations of their choice. This differs from other modes of public transport where the pick-up and drop-off locations are determined by the provider, not by the passenger.
Taxi services are typically provided by automobiles, but in other countries various human-powered vehicles, such as the rickshaw or pedicab. Some countries also use animal-powered vehicles such as the Hansom cab or even boats, such as water taxis or gondolas. Often this decision is based upon the reliability of these vehicles.