K18 vs TRESemmé:Which is more popular?
In September 2026, K18 had more branded searches than TRESemmé among shampoo brands in the United States. K18 had about 110,000 branded searches, while TRESemmé had 33,100. K18 made up 11.7% of all shampoo brand searches we track, and TRESemmé accounted for 3.5%. When we asked ChatGPT and Google AI Overviews about shampoo brands, neither K18 nor TRESemmé appeared in any of the five answers.
Who do people search for more?
K18, about 3 searches for every 1 for TRESemmé
Who does AI mention more?
Both were mentioned in 0 of 5 answers.
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Top shampoo brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, neither K18 nor TRESemmé showed up 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.
Olaplex3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Pureology3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Redken2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Dove2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Kérastase1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Amika1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Herbal Essences1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers- K180 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Moroccanoil0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
TRESemmé0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about shampoo brands
5 answers
Asked ChatGPT
“Which shampoo should I use?”
Asked ChatGPT
“What are the best shampoo brands?”
Asked ChatGPT
“What is the best shampoo for hair loss?”
Searched Google, AI Overview
“shampoo”
Searched Google, AI Overview
“best shampoo”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in United States on October 26, 2026.
Is K18 or TRESemmé more popular in search?
This chart shows how often people search Google for K18 and TRESemmé by name. Each line represents a brand's share of searches for all 15 shampoo brands we track, month by month, from searches in United States.
Share of searches by month for K18, TRESemmé. The figures are in the table below the chart.
View monthly share of searches table
| Month | Kérastase | Olaplex | K18 | Moroccanoil | Redken | Native | Head & Shoulders | Amika | Herbal Essences | Pureology | TRESemmé | Dove | Garnier | Pantene | Briogeo |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 21.1% | 14.2% | 9.5% | 9.5% | 7.8% | 5.2% | 5.2% | 4.3% | 3.5% | 4.3% | 2.8% | 3.5% | 3.5% | 2.8% | 2.8% |
| Nov 2025 | 23.1% | 18.9% | 10.4% | 10.4% | 8.4% | 3.1% | 3.8% | 3.8% | 2.5% | 4.6% | 1.7% | 2.1% | 2.1% | 2.1% | 3.1% |
| Dec 2025 | 21.6% | 17.7% | 9.7% | 11.9% | 8% | 3.6% | 3.6% | 4.3% | 2.9% | 4.3% | 2% | 2.4% | 2.4% | 2.9% | 2.9% |
| Jan 2026 | 22.6% | 15.2% | 10.1% | 10.1% | 8.3% | 3.7% | 4.6% | 3.7% | 3.7% | 3.7% | 2.5% | 2.5% | 3% | 3% | 3% |
| Feb 2026 | 21.5% | 14.4% | 11.7% | 9.7% | 7.9% | 4.3% | 4.3% | 4.3% | 3.5% | 4.3% | 2.4% | 2.9% | 2.9% | 2.9% | 2.9% |
| Mar 2026 | 19.8% | 16.2% | 10.8% | 8.9% | 8.9% | 4.9% | 4% | 4% | 4% | 4% | 2.7% | 2.7% | 3.3% | 3.3% | 2.7% |
| Apr 2026 | 25.1% | 13.8% | 11.2% | 9.2% | 7.5% | 4.1% | 4.1% | 4.1% | 4.1% | 3.4% | 2.3% | 2.8% | 2.8% | 2.8% | 2.8% |
| May 2026 | 21.3% | 14.3% | 11.7% | 9.6% | 7.9% | 4.3% | 4.3% | 4.3% | 3.5% | 4.3% | 2.4% | 2.9% | 2.9% | 3.5% | 2.9% |
| Jun 2026 | 23% | 12.6% | 10.3% | 10.3% | 8.5% | 4.6% | 4.6% | 3.8% | 3.8% | 4.6% | 2.5% | 2.5% | 3.1% | 3.1% | 2.5% |
| Jul 2026 | 21.3% | 14.3% | 11.6% | 9.6% | 7.8% | 5.2% | 4.3% | 4.3% | 3.5% | 4.3% | 2.9% | 2.9% | 2.9% | 2.9% | 2.3% |
| Aug 2026 | 20.2% | 13.6% | 13.6% | 9.1% | 7.4% | 5% | 4.1% | 4.1% | 4.1% | 4.1% | 3.3% | 2.7% | 3.3% | 3.3% | 2.2% |
| Sep 2026 | 21.5% | 14.4% | 11.7% | 9.7% | 7.9% | 5.3% | 4.3% | 3.5% | 3.5% | 3.5% | 3.5% | 2.9% | 2.9% | 2.9% | 2.4% |
How has the K18 and TRESemmé comparison changed over the last 12 months?
3 findings
- K18 was ahead of TRESemmé in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, K18’s share of searches among shampoo brands in the United States moved from 9.5% to 11.7%, and its estimated monthly branded searches moved from 90.5K to 110K.
- Across the 12 months ending September 2026, TRESemmé’s share of searches among shampoo brands in the United States moved from 2.8% to 3.5%, and its estimated monthly branded searches moved from 27.1K to 33.1K.
How did search popularity change for United States shampoo brands in September 2026?
3 changes
In September 2026, Olaplex overtook K18 to rank 2nd among shampoo brands in the United States, with 14.4% of the searches.
In September 2026, K18 lost share of searches among shampoo brands in the United States, from 13.6% to 11.7%.
TRESemmé’s share of searches among shampoo brands in the United States has gained ground for 3 months in a row, from 2.5% to 3.5% in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using K18’s and TRESemmé’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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