2024-03-28 00:00:00 Holler only works with fully registered taxi companies and private hire drivers. With our integrated services into some of the UK's and Europes largest taxi booking software providers, it provides us with the ability to access over 100,000 professional full time licensed taxi drivers as we roll out across England. Our driver app (launching 2021) enables smaller fleets and hackney cars (UK) to bid and receive work, giving the user the widest choice of any app previously on the market, bringing major fleets, single driver and hackney to one place. Giving YOU, the user, the widest choice possible.