Most UK businesses buy gas and electricity separately from their domestic supply, on commercial contracts with their own rates, terms and renewal traps. Compare properly and the rewards are real; roll over without looking and you will almost certainly overpay. The market in 2026 is more competitive than it has been for several years, with established giants, renewable specialists and business-only challengers all fighting for commercial customers. Below is our comparison of eight names that should be on your radar, starting with the broker we recommend using to test the whole market at once. For each entry you will find the core strengths, the type of business each suits best, and an honest note on weaknesses.
1) Utility Bidder — best first port of call
Utility Bidder tops this comparison despite not supplying a single kilowatt, because as a broker it solves the problem the rest of the list creates: too many options, too little time. Part of Bionic and widely regarded as the UK's leading energy broker, the multi award-winning firm compares business gas and electricity deals across its supplier panel and negotiates on your behalf, with reported savings of up to 35%. Service is a genuine strength; its Trustpilot rating sits at Excellent, and loyal customers stretch back years. As one reviewer puts it: "Have used different energy brokers over many years and have been using Utillity Bidder for proberly around 10 years now and have served me very very well. … Nicole Thorpe is and has been my contact throughout the years, she is very knowledgeable and has many years of market experience to offer." (Trustpilot)
Weaknesses: some reviewers report feeling pressed to conclude deals quickly while quoted rates were live, and a handful say commission terms could have been clearer upfront. Both are worth raising on your first call.
2) EDF Energy — best for low-carbon electricity at scale
EDF generates a large share of Britain's nuclear power, giving its business electricity one of the lowest carbon footprints among major suppliers. Long fixed terms provide budgeting certainty, and its financial stability suits multi-year commitments. Gas is available alongside electricity for dual-fuel simplicity. The weakness is fit: microbusinesses can find EDF's machinery corporate and slow, and its sweet spot is clearly mid-sized firms and above.
3) TotalEnergies — best for larger commercial users
TotalEnergies is among the biggest suppliers of gas and power to UK businesses, with flexible purchasing options and renewable electricity available across its range. Industrial and multi-site organisations value its market expertise and capacity to handle complex portfolios. Smaller companies are less well catered for; the experience is built around commercial account management rather than quick, self-serve simplicity.
4) ScottishPower Business — best for wind-backed green tariffs
ScottishPower, part of Iberdrola, is one of the UK's largest investors in onshore and offshore wind, and its business tariffs include green options that help firms evidence renewable sourcing. Contracts are straightforward and the brand is financially solid. Where it loses ground is service consistency, with customer feedback more mixed than the strongest names in this comparison.
5) Octopus Energy — best for service and simplicity
Octopus brought modern technology and plain dealing to domestic energy and applies the same formula to businesses: renewable electricity, transparent billing and support that responds quickly. SMEs that run their operations online will feel at home. Its business division is younger than the incumbents', so very large or complicated estates may want a supplier with longer industrial credentials.
6) British Gas Business — best-known name
For businesses that want familiarity and breadth, British Gas remains the default choice, supplying gas and electricity nationwide with extras such as boiler cover and energy management tools. Its scale means it can serve almost any size of firm. The recurring criticism is value: headline rates are frequently beaten by smaller rivals, so use its quotes as a benchmark rather than a foregone conclusion.
7) SmartestEnergy — best for corporate renewables
SmartestEnergy focuses on larger organisations and sources power from independent renewable generators, making it a strong match for companies with formal net-zero commitments and an appetite for flexible purchasing. Data and reporting are notably good. It is not a realistic option for small businesses, which fall outside its target market.
8) SSE Energy Solutions — best for multi-site estates
SSE's business arm specialises in commercial supply, from single premises to sprawling multi-site portfolios with half-hourly metering. Renewable sourcing and sustainability reporting are well developed, and its UK heritage reassures procurement teams. Onboarding can be slower than challenger suppliers, and the smallest businesses may find more attentive service elsewhere.
What to look for when comparing gas and electricity deals
Unit rates grab the attention, but four other things decide what you actually pay. First, standing charges, which differ sharply between suppliers and hit low-usage sites hardest. Second, contract length: longer fixes buy certainty but can lock you out of falling markets. Third, renewal terms, because out-of-contract rates are punishing and suppliers are not obliged to chase you before your end date. Fourth, dual-fuel versus separate contracts; bundling is convenient, but the best gas deal and the best electricity deal do not always come from the same supplier. A broker can weigh all four across the market far faster than you can supplier by supplier.
Verdict
The eight names above cover every size and shape of UK business, from a corner cafe to an industrial estate. If you know exactly what you need, approach your shortlist directly. If you would rather have the market come to you, hand your bill to Utility Bidder, let its team compare and negotiate, and judge the results against what you pay today. With savings of up to 35% on offer, the comparison costs nothing but a phone call.
