These are the brands named when we asked the engines this market’s real buyer questions, repeatedly, on 2026-07-24. 94 measured answers across 12 questions. Share = the proportion of an engine’s answers naming each brand, counted once per answer. This is a measurement of what the AI says, not a quality ranking, and it changes: that is rather the point.
ChatGPT · Search
| Names surfaced | Share of repeated answers |
|---|---|
| Bristol Renewable Heat Ltd | 32% of answers |
| Heat Geek | 24% of answers |
| Energy Saving Trust | 24% of answers |
| Invictus Mechanical Ltd | 20% of answers |
4 names on this board changed between repeated runs. Positions are held, not owned.
Google · AI Overview
| Names surfaced | Share of repeated answers |
|---|---|
| Octopus Energy | 36% of answers |
| Vaillant | 36% of answers |
| Heat Geek | 27% of answers |
| Daikin | 27% of answers |
0 names on this board changed between repeated runs. Positions are held, not owned.
Perplexity
| Names surfaced | Share of repeated answers |
|---|---|
| Octopus Energy | 31% of answers |
| British Gas | 28% of answers |
| Dwellow | 25% of answers |
| Elite Renewables | 25% of answers |
3 names on this board changed between repeated runs. Positions are held, not owned.
Some surfaced names are advisory bodies, manufacturers, schemes or certification marks rather than local providers; the boards report what the engines said, not what a buyer should conclude. Method in full, shown on a real measurement: how we measure. The live version of this board, including the engines disagreeing with each other, runs on the home page. If your business belongs in this market and isn’t on these boards: that can be investigated, worked on, and measured.
Sampled 2026-07-24 · re-measured with each monthly refresh