--- title: "Billi vs Doulton: Which is searched more in New Zealand?" description: "Is Billi or Doulton more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Water filter brands set in New Zealand. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/nz/compare/billi-vs-doulton" publisher: "Brandwave" --- # Billi vs Doulton: Which is searched more in New Zealand? Is Billi or Doulton more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Water filter brands set in New Zealand. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: Billi and Doulton - **Competitive set**: Water filter brands - **Market**: New Zealand - **Month measured**: Sep 2026 - **Billi Share of Search**: 1.6% - **Doulton Share of Search**: 4.4% ## Is Billi or Doulton more popular in search? - In September 2026, Doulton had more branded searches than Billi among water filter brands in New Zealand. Doulton had about 720 branded searches, while Billi had 260. Doulton made up 4.4% of all water filter brand searches we track, and Billi accounted for 1.6%. - Doulton was ahead of Billi in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, Billi’s share of searches among water filter brands in New Zealand moved from 1.7% to 1.6%, and its estimated monthly branded searches held steady at 260. - Across the 12 months ending September 2026, Doulton’s share of searches among water filter brands in New Zealand moved from 4.7% to 4.4%, and its estimated monthly branded searches held steady at 720. ## Top water filter brands in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Doulton was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Billi did not appear in any of the five answers. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | Brita | 1st | 3 of 3 | 1 of 2 | 4 of 5 | | Puretec | 2nd | 3 of 3 | 1 of 2 | 4 of 5 | | Doulton | 3rd | 3 of 3 | 1 of 2 | 4 of 5 | | Philips | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Hydroflow | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Waters Co | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Billi | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Zip Water | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about water filter brands - Asked ChatGPT "Which water filter brand should I buy in New Zealand?": 1. Brita, 2. Puretec, 3. Doulton - Asked ChatGPT "What are the best water filter brands in New Zealand?": 1. Puretec, 2. Brita, 3. Doulton - Asked ChatGPT "What's the best water filter brand in New Zealand for clean drinking water?": 1. Puretec, 2. Brita, 3. Doulton - Searched Google, AI Overview "best water filter": 1. Brita, 2. Doulton - Searched Google, AI Overview "home water filter nz": 1. Puretec Not named in any answer: Philips, Hydroflow, Waters Co, Billi and Zip Water. Brands are listed in the order each answer named them. The answers were collected in New Zealand on October 21, 2026. ## How did search popularity change for New Zealand water filter brands in September 2026? - In September 2026, Doulton gained share of searches among water filter brands in New Zealand, from 3.6% to 4.4%. ## Month by month | Month | Billi estimated searches | Billi Share of Search | Billi rank | Doulton estimated searches | Doulton Share of Search | Doulton rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 260 | 1.7% | 7 | 720 | 4.7% | 5 | | Nov 2025 | 250 | 1.5% | 7 | 720 | 4.3% | 5 | | Dec 2025 | 180 | 1.1% | 7 | 880 | 5.5% | 4 | | Jan 2026 | 230 | 1.4% | 7 | 880 | 5.3% | 5 | | Feb 2026 | 220 | 1.5% | 7 | 590 | 3.9% | 5 | | Mar 2026 | 260 | 1.7% | 7 | 590 | 3.8% | 5 | | Apr 2026 | 260 | 1.6% | 7 | 720 | 4.4% | 5 | | May 2026 | 260 | 1.6% | 7 | 720 | 4.3% | 5 | | Jun 2026 | 250 | 1.4% | 7 | 720 | 4.1% | 5 | | Jul 2026 | 200 | 1.2% | 7 | 590 | 3.5% | 5 | | Aug 2026 | 250 | 1.5% | 7 | 590 | 3.6% | 5 | | Sep 2026 | 260 | 1.6% | 7 | 720 | 4.4% | 5 | ## How each brand is measured Brandwave collects information about searches that people make online using Billi’s and Doulton’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. - **Billi**: Measured on the search terms “billi tap”, “billi water” and “billi water filter”, summed into one figure. - **Doulton**: Measured on the search term “doulton”. - [Billi profile](/demand/nz/brands/billi) - [Doulton profile](/demand/nz/brands/doulton) - [All water filter brands in New Zealand](/demand/nz/categories/nz-water-filter-brands): The set both shares are measured inside, 8 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is Billi or Doulton more popular in search? In September 2026, Doulton had more branded searches than Billi among water filter brands in New Zealand. Doulton had about 720 branded searches, while Billi had 260. Doulton made up 4.4% of all water filter brand searches we track, and Billi accounted for 1.6%. ## Cite this page Brandwave. "Billi vs Doulton: Which is searched more in New Zealand?". https://gobrandwave.com/demand/nz/compare/billi-vs-doulton This page is also available as HTML at https://gobrandwave.com/demand/nz/compare/billi-vs-doulton. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.