Advances in electric motors, battery technology and autonomous software has triggered an explosion in the field of electric air taxis.
Larry Page, CEO of Google parent company Alphabet , has poured millions into aviation start-ups Zee Aero and Kitty Hawk, which are both striving to create all-electric flying cabs.
Kitty Hawk is believed to be developing a flying car and has already filed more than a dozen different aircraft registrations with the Federal Aviation Administration, or FAA.
Page, who co-founded Google with Sergey Brin back in 1998, has personally invested $100 million (£70 million) into the two companies, which have yet to publicly acknowledge or demonstrate their technology.
Secretive start-up Joby Aviation has come a step closer to making its flying taxi a reality.
The California-based company, which is building an all-electric flying taxi capable of vertical take-off, has received $100 million (£70 million) in funding from a group of investors led by Toyota and Intel.
The money will be used to develop the firm’s 'megadrone' which can reach speeds of 200mph (321kph) powered by lithium nickel cobalt manganese oxide batteries.
The Joby S2 prototype has 16 electric propellers, 12 of which are designed for vertical take-off and landing (VTOL), which means no runway is needed.
AirSpaceX unveiled its latest prototype, Mobi-One, at the North American International Auto Show in early 2018. Like its closest rivals, the electric aircraft is designed to carry two to four passengers and is capable of vertical take-off and landing
The aircraft takes off vertically, like a helicopter, before folding away 12 of its propellers so it can glide like a