Smaller UK energy suppliers
The Big 6 hold most accounts, but the smaller and challenger suppliers are where you often find the greenest generation, the keenest fixed deals or a specific bundle. Some are long-standing green pioneers; some are price-led newcomers with a short track record. This is where a lower profile can mean less public data, so a few of the scores below show a question mark rather than a guessed figure. Every card links to the full profile.
Utility Warehouse
Puts energy, broadband, mobile and insurance on one bill, sold through a partner network. Competes on the bundle and loyalty discounts, backed by a profitable listed parent, rather than on smart tariffs.
See profile & score →Good Energy
One of the original 100% renewable suppliers and a long-time backer of small-scale generators. Now expanding into heat pumps, solar and EV services. Premium pricing, but a genuine green record.
See profile & score →So Energy
A London challenger owned by Ireland's state electricity company ESB, known for competitive fixed deals and EV options with a digital-first approach.
See profile & score →Ecotricity
Britain's original green supplier, putting customer revenue into building new wind and solar ("bills into mills") and developing green gas from grass. Strong service scores; a dated app.
See profile & score →Fuse Energy
A recent, app-first entrant positioning as a price-led disruptor. Well funded for a newcomer, but with a short operating record and a narrow tariff range so far.
See profile & score →100Green
The only UK supplier selling both 100% green electricity and 100% green gas as standard. A small, premium, long-standing green supplier rather than a price-led one.
See profile & score →Outfox Energy
Trading as Outfox the Market, a price-led, app-first supplier that markets 100% renewable (REGO-backed) electricity. A keen headline price, with a service record that has moved around over the years.
See profile & score →TruEnergy
A smaller UK supplier with a limited public record. Several areas show a question mark for want of standardised data; verify current details before switching.
See profile & score →Home Energy
A small independent supplier on a straightforward tariff line-up. Limited public data, so parts of its score are left unscored rather than guessed.
See profile & score →E
A Yorkshire-based independent (E Gas & Electricity) serving households on standard variable and fixed tariffs. A simple, no-frills supplier with a limited public data footprint.
See profile & score →Is a smaller supplier safe?
If a supplier fails, you are not cut off and you do not lose credit. Ofgem's Supplier of Last Resort process moves you to another licensed supplier, who honours your outstanding balance and any credit is protected. The disruption is the hassle of a forced move and, sometimes, landing on that supplier's standard tariff. That is why our rankings score financial strength as one of six areas, and why a keen headline price is worth weighing against the record behind it. See how the score works on the calculations page.