Castle Water vs Source for Business:Which is more popular?
In September 2026, Castle Water had more branded searches than Source for Business among business water suppliers in the United Kingdom. Castle Water had about 18,100 branded searches, while Source for Business had 1,600. Castle Water made up 28.4% of all business water supplier searches we track, and Source for Business accounted for 2.5%. When we asked ChatGPT and Google AI Overviews about business water suppliers, Castle Water appeared in three of the five answers and Source for Business in two. Castle Water and Source for Business were each mentioned first in two of the four answers.
Who do people search for more?
Castle Water, about 11 searches for every 1 for Source for Business
Who does AI mention more?
Castle Water, mentioned in 3 of 5 answers, Source for Business in 2
Who does AI recommend more?
Each is named first in 2 of 4 answers.
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Top business water suppliers in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Castle Water was mentioned in three out of five: in one of the three ChatGPT answers and in both Google AI Overviews. Source for Business was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Castle Water and Source for Business were each listed first in two of the four answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Castle Water3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Water Plus2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Business Stream2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Wave2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Everflow2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers- Source for Business2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Waterscan0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about business water suppliers
5 answers
Asked ChatGPT
“What's the best business water supplier in the UK?”
Asked ChatGPT
“Can a small business switch water supplier in England, and is it worth it?”
Asked ChatGPT
“Which business water retailers have the best customer service?”
Searched Google, AI Overview
“business water suppliers”
Searched Google, AI Overview
“business water”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in United Kingdom on October 28, 2026.
Is Castle Water or Source for Business more popular in search?
This chart shows how often people search Google for Castle Water and Source for Business by name. Each line represents a brand's share of searches for all seven business water suppliers we track, month by month, from searches in United Kingdom.
Share of searches by month for Castle Water, Source for Business. The figures are in the table below the chart.
View monthly share of searches table
| Month | Water Plus | Castle Water | Business Stream | Wave | Everflow | Source for Business | Waterscan |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 42.3% | 28.3% | 18.9% | 5.6% | 2% | 2.5% | 0.33% |
| Nov 2025 | 44.1% | 29.4% | 16.1% | 5.9% | 2.1% | 2.1% | 0.34% |
| Dec 2025 | 43.1% | 28.8% | 19.2% | 4.7% | 1.9% | 1.9% | 0.33% |
| Jan 2026 | 42.3% | 28.3% | 18.9% | 5.6% | 2% | 2.5% | 0.41% |
| Feb 2026 | 42.3% | 28.3% | 18.9% | 5.6% | 2% | 2.5% | 0.41% |
| Mar 2026 | 42.9% | 28.7% | 19.2% | 4.7% | 2.1% | 2.1% | 0.41% |
| Apr 2026 | 42.8% | 28.6% | 19.1% | 4.6% | 2.1% | 2.5% | 0.33% |
| May 2026 | 43% | 28.7% | 19.2% | 4.6% | 2.1% | 2.1% | 0.33% |
| Jun 2026 | 42.6% | 28.4% | 19% | 4.6% | 2.5% | 2.5% | 0.41% |
| Jul 2026 | 42.6% | 28.4% | 19% | 4.6% | 2.5% | 2.5% | 0.41% |
| Aug 2026 | 40.4% | 27% | 22% | 4.4% | 2.9% | 2.9% | 0.38% |
| Sep 2026 | 42.5% | 28.4% | 19% | 4.6% | 2.5% | 2.5% | 0.5% |
How has the Castle Water and Source for Business comparison changed over the last 12 months?
3 findings
- Castle Water was ahead of Source for Business in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Castle Water’s share of searches among business water suppliers in the United Kingdom moved from 28.3% to 28.4%, and its estimated monthly branded searches held steady at 18.1K.
- Across the 12 months ending September 2026, Source for Business’ share of searches among business water suppliers in the United Kingdom held steady at 2.5%, and its estimated monthly branded searches held steady at 1.6K.
How did search popularity change for United Kingdom business water suppliers in September 2026?
1 change
In September 2026, Castle Water gained share of searches among business water suppliers in the United Kingdom, from 27% to 28.4%.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Castle Water’s and Source for Business’ 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.
Castle Water
1 branded search term
- castle water
Source for Business
1 branded search term
- source for business
Other head-to-heads among business water suppliers
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