TL;DR

Magic AI, a London maker of smart fitness mirrors driven by AI, came first in Deloitte’s UK Technology Fast 50 for 2026, with three-year revenue up 19,774%. Deloitte presented the awards on Thursday 5 November. Two more AI-based businesses feature near the top: warehouse robotics firm Dexory in second and Cardiff’s Finalrentals in 14th.

The AI companies in the ranking

Founded in 2022, Magic AI combines its own computer vision with live tracking of the user’s body to coach people through workouts at home, acting as a virtual personal trainer. Co-founder and chief executive Varun Bhanot said the company has served more than 30,000 people in 43 countries, and that more than half a million AI-coached sessions have been completed.

Dexory, based in the South East, grew revenue by 17,687%. It deploys autonomous robots and real-time data capture so logistics operators can track stock and see inside their warehouses more accurately. It also won the ranking’s Women in Leadership category.

Finalrentals, 14th on 2,865% growth, runs BLADE, an AI booking platform for car hire worldwide.

The wider picture

The 50 companies recorded average three-year growth of 2,824% and together took £727 million in revenue in the 2025/26 year. Kiren Asad, who leads the programme at Deloitte, said the 50th-placed firm grew 708%, the highest entry threshold since 2021.

London dominates, with two-thirds of the 50 headquartered in the capital. Three regions had three companies apiece: the South East, Cambridgeshire and East, and a combined South West and Wales region. Glasgow’s Phlo, a digital healthcare company, placed ninth.

Asad argued that strong companies “can and do emerge across the UK” but need the right conditions to start and scale in every region.

What it means

The ranking is a general technology league table, not an AI one, and the release does not give the revenue base behind each growth percentage. In our view, the useful signal is where AI is showing up: in consumer hardware, warehouse robotics and booking software, rather than in model building. For UK investors and founders, the top two places going to companies that apply AI to physical products shows that companies applying AI, not only those building models, can lead UK tech growth tables.