In-depth guides to every major UK energy supplier — tariffs, reviews, switching tips, and how they compare.
The UK's largest and most innovative supplier
Read guide →The UK's oldest and best-known energy brand
Read guide →French-owned nuclear and renewables giant
Read guide →The modern face of E.ON in Great Britain
Read guide →Iberdrola-owned supplier with a green focus
Read guide →Renewable energy from Scotland
Read guide →Carbon-neutral supplier with a digital focus
Read guide →Acquired by Octopus Energy in December 2023
Read guide →The UK's leading prepayment meter specialist
Read guide →Straightforward, affordable green energy
Read guide →Pioneer of 100% renewable energy in the UK
Read guide →Green energy company and EV charging pioneer
Read guide →Low-cost challenger with transparent pricing
Read guide →Ceased trading April 2025 — customers moved to British Gas
Read guide →The green challenger absorbed by Octopus Energy
Read guide →Enter your postcode to compare live tariffs from all major suppliers.
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