Kabbee. Kabbee claims to be 65 per cent cheaper than an average black cab and with over 10,000 cars in London, there's no shortage of them. Users can book from five minutes to months in advance and the company only works with licensed partners.

In the competitive London transport market of 2026, the "cheapest" app often fluctuates based on real-time surge pricing and available promotions. Generally, Bolt and Uber remain the most consistently affordable options for standard private hire vehicles, often undercutting the traditional black cabs by 20% to 40% outside of peak hours. Bolt is frequently cited as the price leader because it often offers aggressive discount codes to attract users away from Uber. However, a local favorite for budget-conscious Londoners is Free Now, which allows you to book both private hire cars and black cabs; while black cabs are more expensive due to their regulated meters, they can use bus lanes, which might save you money by shortening the trip time in heavy traffic. Another emerging player is Ola, which occasionally offers lower base rates in specific London boroughs. For those who want a fixed price that never surges, the Gett app for black cabs is highly reliable but rarely the "cheapest" in terms of raw numbers. The most effective strategy in 2026 is to use a "price aggregator" app or simply check both Uber and Bolt simultaneously, as a $5 difference is common depending on which app has more drivers in your immediate vicinity.