Coway vs iSpring:Which is more popular?
In September 2026, Coway had more branded searches than iSpring among water purifier brands worldwide. Coway had about 165,000 branded searches, while iSpring had 16,200. Coway made up 52.3% of all water purifier brand searches we track, and iSpring accounted for 5.1%. When we asked ChatGPT and Google AI Overviews about water purifier brands, iSpring appeared in three of the five answers and Coway in none.
Who do people search for more?
Coway, about 10 searches for every 1 for iSpring
Who does AI mention more?
iSpring, mentioned in 3 of 5 answers, Coway in 0
Who does AI recommend more?
iSpring, the only one of the two named
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Top water purifier brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, iSpring was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Coway did not appear in any of the five 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.
- AquaTru5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Ro5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers- Aquasana4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- iSpring3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- APEC Water Systems3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Brita3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Coway0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
LG0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about water purifier brands
5 answers
Asked ChatGPT
“Which water purifier brand should I buy?”
Asked ChatGPT
“What are the best water purifier brands?”
Asked ChatGPT
“What's the best water purifier brand for clean drinking water?”
Searched Google, AI Overview
“best water purifier”
Searched Google, AI Overview
“home water purifier”
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is Coway or iSpring more popular in search?
This chart shows how often people search Google for Coway and iSpring by name. Each line represents a brand's share of searches for all eight water purifier brands we track, month by month, from English-language searches worldwide.
Share of searches by month for Coway, iSpring. The figures are in the table below the chart.
View monthly share of searches table
| Month | Coway | AquaTru | LG | Aquasana | Ro | iSpring | APEC Water Systems | Brita |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 52.5% | 10.5% | 10.5% | 10.5% | 7.1% | 5.2% | 3.2% | 0.51% |
| Nov 2025 | 51.5% | 15.5% | 8.5% | 10.3% | 5.7% | 5.1% | 3.1% | 0.41% |
| Dec 2025 | 48% | 14.4% | 9.6% | 11.8% | 6.4% | 5.8% | 3.5% | 0.46% |
| Jan 2026 | 49.7% | 12.2% | 8.2% | 12.2% | 8.2% | 6% | 3% | 0.57% |
| Feb 2026 | 47.1% | 14.1% | 9.4% | 11.5% | 7.7% | 5.6% | 3.5% | 1% |
| Mar 2026 | 49.4% | 12.1% | 9.9% | 9.9% | 8.1% | 5.9% | 3% | 1.6% |
| Apr 2026 | 48.6% | 14.6% | 9.8% | 9.8% | 8% | 5.8% | 2.9% | 0.56% |
| May 2026 | 49.4% | 14.8% | 9.9% | 9.9% | 6.6% | 5.9% | 3% | 0.39% |
| Jun 2026 | 52.3% | 12.8% | 10.5% | 8.6% | 7% | 5.1% | 3.1% | 0.41% |
| Jul 2026 | 52.3% | 12.8% | 10.5% | 8.6% | 7% | 5.1% | 3.1% | 0.51% |
| Aug 2026 | 49.2% | 14.8% | 9.9% | 9.9% | 8.1% | 4.8% | 3% | 0.48% |
| Sep 2026 | 52.3% | 12.8% | 10.5% | 8.6% | 7% | 5.1% | 3.1% | 0.41% |
How has the Coway and iSpring comparison changed over the last 12 months?
3 findings
- Coway was ahead of iSpring in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Coway’s share of searches among water purifier brands worldwide moved from 52.5% to 52.3%, and its estimated monthly branded searches held steady at 165K.
- Across the 12 months ending September 2026, iSpring’s share of searches among water purifier brands worldwide moved from 5.2% to 5.1%, and its estimated monthly branded searches held steady at 16.2K.
How did search popularity change for water purifier brands worldwide in September 2026?
1 change
In September 2026, Coway gained share of searches among water purifier brands worldwide, from 49.2% to 52.3%.
How are branded searches counted?
3 search terms
Brandwave collects information about searches that people make online using Coway’s and iSpring’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.
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