Brandwave

How popular isK18?

In October 2026, people searched for K18 by name about 50,400 times worldwide, a 51.3% increase from the previous year. These searches made up 10.8% of all global purple shampoo brand searches, placing K18 fourth out of ten brands. When we asked both ChatGPT and Google AI Overviews about purple shampoo brands, K18 did not appear in any of the answers.

Search and AI answers in October 2026

K18 is the fourth most searched of 10 competitors and not named in the AI answers we collected.

  1. FanolaShare of searches 27%Mentioned in 1 of 5 AI answersPlace in AI recommendations 5th
  2. OlaplexShare of searches 16.2%Mentioned in 4 of 5 AI answersPlace in AI recommendations 2nd
  3. ClairolShare of searches 13.2%Mentioned in 0 of 5 AI answersPlace in AI recommendations –
  4. K18Share of searches 10.8%Mentioned in 0 of 5 AI answersPlace in AI recommendations –
  5. RedkenShare of searches 10.8%Mentioned in 2 of 5 AI answersPlace in AI recommendations 3rd

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Top purple shampoo brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, K18 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.

  1. Amika1st
  2. Olaplex2nd
  3. Redken3rd
  4. Pureology4th
  5. Fanola5th
  6. Matrix6th
  7. Clairol–
  8. K18–
  9. Joico–
  10. Kristin Ess–

Mentioned by AI

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

  • Olaplex4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Amika3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Redken2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Fanola1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Matrix1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Pureology1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Clairol0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • K180 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Joico0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Kristin Ess0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about purple shampoo brands

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 25, 2026.

How often do people search for K18 compared with other purple shampoo brands worldwide?

K18 against purple shampoo brands worldwide, by month

Share of searches by month for Fanola, Olaplex, Clairol, K18, Redken, Joico, Amika, Matrix, Kristin Ess, Pureology. The figures are in the table below the chart.

View monthly share of searches table
MonthFanolaOlaplexClairolK18RedkenJoicoAmikaMatrixKristin EssPureology
Nov 202535.9%14.4%14.4%0.31%11.8%6.4%5.2%5.2%2.8%3.5%
Dec 202536.1%14.5%14.5%0.31%11.8%6.4%5.3%5.3%2.3%3.5%
Jan 202634.5%14.9%14.9%0.39%12.2%6.6%5.4%5.4%2.9%2.9%
Feb 202635.7%15.4%15.4%0.33%10.3%6.9%5.6%4.5%3%3%
Mar 202635.4%15.3%12.5%3%10.3%6.8%5.6%5.6%2.4%3%
Apr 202629.9%12.9%10.6%15.8%8.7%5.8%4.7%3.8%5.8%2%
May 202626.7%14.1%11.6%21.2%9.5%5.2%3.4%4.2%1.8%2.3%
Jun 202630.6%13.2%10.8%16.2%10.8%5.9%3.9%3.9%2.1%2.6%
Jul 202629.7%12.8%10.5%19.2%10.5%5.7%3.8%3.8%2%2%
Aug 202629.7%13.7%13.7%13.7%9.2%6.1%5%4.1%2.2%2.7%
Sep 202627.5%15.6%12.7%12.7%10.4%6.9%4.6%4.6%2.4%2.4%
Oct 202627%16.2%13.2%10.8%10.8%7.2%4.8%4.8%2.6%2.6%

  1. 1.Fanola

    27%

    Held 1st. 24.7K estimated branded searches, +15.4% vs prior month. Share -0.5 points.

  2. 2.Olaplex

    16.2%

    Held 2nd. 14.8K estimated branded searches, +22.3% vs prior month. Share +0.6 points.

  3. 3.Clairol

    13.2%

    Held 3rd. 12.1K estimated branded searches, +22.2% vs prior month. Share +0.5 points.

  4. 4.K18

    10.8%

    Held 4th. 9.9K estimated branded searches, 0% vs prior month. Share -1.9 points.

  5. 5.Redken

    10.8%

    Held 5th. 9.9K estimated branded searches, +22.2% vs prior month. Share +0.4 points.

  6. 6.Joico

    7.2%

    Held 6th. 6.6K estimated branded searches, +22.2% vs prior month. Share +0.3 points.

  7. 7.Amika

    4.8%

    Held 7th. 4.4K estimated branded searches, +22.2% vs prior month. Share +0.2 points.

  8. 8.Matrix

    4.8%

    Held 8th. 4.4K estimated branded searches, +22.2% vs prior month. Share +0.2 points.

  9. 9.Kristin Ess

    2.6%

    Held 9th. 2.4K estimated branded searches, +26.3% vs prior month. Share +0.2 points.

  10. 10.Pureology

    2.6%

    Held 10th. 2.4K estimated branded searches, +26.3% vs prior month. Share +0.2 points.

Olaplex, Redken and Pureology sell other things too, so only their searches that name this product count here, like “olaplex purple shampoo”.

Compare popularity between K18 and its closest rivals

Every comparison with K18

15 comparisons

How has branded search demand for K18 changed worldwide over the last 12 months?

4 findings
  • Across the 12 months ending October 2026, estimated monthly branded searches for K18 worldwide rose from 33.3K to 50.4K.
  • Across the 12 months ending October 2026, K18’s share of searches among purple shampoo brands worldwide increased from 0.31% to 10.8%.
  • Across the 12 months ending October 2026, K18’s share of searches among purple shampoo brands worldwide peaked at 21.2% in May 2026 and was lowest at 0.31% in November 2025.
  • Across the 12 months ending October 2026, K18 rose from 10th to 4th among purple shampoo brands worldwide.

How did search popularity change for purple shampoo brands worldwide in October 2026?

6 changes

  1. In October 2026, Olaplex gained share of searches among purple shampoo brands worldwide, from 15.6% to 16.2%.

  2. In October 2026, K18 lost share of searches among purple shampoo brands worldwide, from 12.7% to 10.8%.

  3. In October 2026, Fanola lost share of searches among purple shampoo brands worldwide, from 27.5% to 27%.

  4. Joico’s share of searches among purple shampoo brands worldwide has gained ground for 3 months in a row, from 5.7% to 7.2% in October 2026.

  5. Matrix’s share of searches among purple shampoo brands worldwide has gained ground for 3 months in a row, from 3.8% to 4.8% in October 2026.

  6. Kristin Ess’ share of searches among purple shampoo brands worldwide has gained ground for 3 months in a row, from 2% to 2.6% in October 2026.

How are K18’s branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using K18’s name. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brand is growing, holding steady, or fading.

  • k18 hair
  • k18 purple shampoo

Do you work for K18? To request corrections or removal please contact us via our support page and we will be happy to assist.

How the Brand Demand Index is measured

Where does K18 compete?

K18 is ranked by how often people search for it in four competitor sets. Each share is worked out among that set's brands, so it differs from set to set.
Competitor setRankShare of searchesRanking
Professional haircare and styling brands9th of 91.1%Show ranking
Hair mask brands3rd of 72%Show ranking
Hair serum brands2nd of 516.3%Show ranking
Purple shampoo brands4th of 1010.8%Shown above
Creator with pink hair and a pink jacket

Is K18 your brand?

Put your own campaigns, spend and outcomes next to this demand line, so you can see which of your marketing lined up with the movements above.

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