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100Green has been recognized for exceptional customer service, earning a top ranking from Citizens Advice and a 'Recommended Provider' status from Which? for 2025. It offers 100% renewable electricity and biogas, although it is exempt from the Ofgem price cap and generally more expensive than other suppliers.

Fuse Energy, launched in July 2023, provides competitive electricity tariffs and has entered the domestic gas market. It aims to offer variable tariffs below the Ofgem price cap and is vertically integrated with its own renewable generation assets.

Good Energy, another premium supplier, sources 100% of its electricity from renewables and 10% biogas, but also operates outside the Ofgem price cap. It has strong environmental credentials and offers rewards for referrals. All three companies cater to consumers prioritizing sustainability, though they come at a higher cost.