Brandwave

100Green vs OVO:Which is more popular?

In September 2026, OVO had more branded searches than 100Green among energy suppliers in the United Kingdom. OVO had about 368,000 branded searches, while 100Green had 5,400. OVO made up 10.1% of all energy supplier searches we track, and 100Green accounted for 0.15%. When we asked ChatGPT and Google AI Overviews about energy suppliers, 100Green appeared in two of the five answers and OVO in one. 100Green was mentioned before OVO in two out of three answers that named either.

Among energy suppliers in the United Kingdom in September 2026

Who do people search for more?

OVO, about 68 searches for every 1 for 100Green

OVO 368K searches100Green 5.4K searches

Who does AI mention more?

100Green, mentioned in 2 of 5 answers, OVO in 1

100Green in 2 of 5OVO in 1 of 5

Who does AI recommend more?

100Green, named ahead of OVO in 2 of 3 answers

100Green first in 2OVO first in 1

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Top energy suppliers in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, 100Green was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. OVO was mentioned in one out of five: in one of the three ChatGPT answers, but not in either of the two Google AI Overviews. 100Green was listed before OVO in two out of three answers that named either.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Octopus Energy1st
  2. E.ON Next2nd
  3. Outfox Energy3rd
  4. British Gas4th
  5. 100Green5th
  6. EDF6th
  7. ScottishPower7th
  8. OVO8th
  9. Ecotricity9th
  10. Good Energy10th
  11. +1 more

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Octopus Energy5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • E.ON Next5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Outfox Energy4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • British Gas2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • EDF2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • ScottishPower2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • 100Green2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • OVO1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Ecotricity1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Good Energy1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers

+1 more

See every answer about energy suppliers

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in United Kingdom on October 22, 2026.

Is 100Green or OVO more popular in search?

This chart shows how often people search Google for 100Green and OVO by name. Each line represents a brand's share of searches for all 11 energy suppliers we track, month by month, from searches in United Kingdom.

100Green and OVO among energy suppliers in the United Kingdom, by month

Share of searches by month for OVO, 100Green. The figures are in the table below the chart.

View monthly share of searches table
MonthOctopus EnergyBritish GasE.ON NextOVOEDFSo EnergyOutfox EnergyEcotricityGood EnergyScottishPower100Green
Oct 202530.7%30.7%13.8%11.3%9.2%1.9%1.1%0.56%0.3%0.2%0.11%
Nov 202531.1%31.1%13.2%11.5%9.3%1.9%0.84%0.46%0.31%0.21%0.11%
Dec 202529.8%29.8%14.3%13.4%8.9%1.8%0.8%0.54%0.3%0.2%0.11%
Jan 202630%30%13.6%13.5%9%1.8%0.89%0.55%0.3%0.2%0.13%
Feb 202629.9%29.9%13.6%13.5%9%1.8%1.1%0.66%0.3%0.24%0.11%
Mar 202631.1%31.1%13.7%11.5%8.6%1.9%1%0.57%0.31%0.25%0.11%
Apr 202635%28.7%13.4%10.5%8.6%1.7%0.94%0.52%0.23%0.23%0.1%
May 202630.5%30.5%14.9%11.2%9.1%1.5%1%0.83%0.25%0.2%0.09%
Jun 202630.5%30.5%14.1%11.2%9.2%1.5%1.3%0.68%0.3%0.45%0.16%
Jul 202630.9%30.9%13.9%11.4%9.3%1.5%0.99%0.56%0.25%0.2%0.17%
Aug 202630.7%30.7%13.8%11.3%9.2%1.9%0.99%0.83%0.25%0.2%0.17%
Sep 202633.6%27.5%14.3%10.1%10.1%1.7%1.1%0.91%0.27%0.22%0.15%

How has the 100Green and OVO comparison changed over the last 12 months?

3 findings
  • OVO was ahead of 100Green in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, 100Green’s share of searches among energy suppliers in the United Kingdom moved from 0.11% to 0.15%, and its estimated monthly branded searches moved from 4.4K to 5.4K.
  • Across the 12 months ending September 2026, OVO’s share of searches among energy suppliers in the United Kingdom moved from 11.3% to 10.1%, and its estimated monthly branded searches moved from 450K to 368K.

How did search popularity change for United Kingdom energy suppliers in September 2026?

2 changes

  1. In September 2026, OVO lost share of searches among energy suppliers in the United Kingdom, from 11.3% to 10.1%.

  2. Estimated monthly branded searches for 100Green in the United Kingdom rose 22.7% over 12 measured months, from 4.4K to 5.4K in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using 100Green’s and OVO’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

100Green

1 branded search term

  • 100green

OVO

1 branded search term

  • ovo energy

How the Brand Demand Index is measured

Other head-to-heads among energy suppliers

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