TOP 10 – UTILITY COMPANIES IN THE UK

Octopus

FOUNDED: 2015 BASED IN: LONDON, ENGLAND CEO: GREG JACKSON

CONSUMER BASE: 7.7 + MILLION UK HOUSEHOLDS WATCH NOW

Zero bills homes explained

Energy’ s ascent from start-up to the UK’ s largest energy supplier in under a decade is without a doubt the most dramatic disruption in the history of UK utilities. Founded by entrepreneur Greg Jackson, Octopus has maximised technology, customer service and sustainability to challenge the entrenched hierarchy of the country’ s power suppliers. The company’ s Kraken platform, which is powered by AI, enables sophisticated dynamic pricing and delivers customer service that has earned Which? Recommended Provider status for eight years running. Octopus’ 100 % renewable electricity supply has positioned the firm perfectly for the transition, while its Kraken platform now powers more than 60 million customer accounts globally through licensing deals with giants including EDF and E. ON. It is now valued at US $ 9bn and operates across 32 countries, proving that technology and a focus on customers can topple even the most established energy empires.

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48 March 2026