Brandwave

Kester Black vs NSI:Which is more popular?

In September 2026, Kester Black had more branded searches than NSI among nail polish brands in New Zealand. Kester Black had about 220 branded searches, while NSI had 10. Kester Black made up 2.1% of all nail polish brand searches we track, and NSI accounted for 0.1%. When we asked ChatGPT and Google AI Overviews about nail polish brands, neither Kester Black nor NSI appeared in any of the four answers.

Among nail polish brands in New Zealand in September 2026

Who do people search for more?

Kester Black, about 22 searches for every 1 for NSI

Kester Black 220 searchesNSI 10 searches

Who does AI mention more?

Both were mentioned in 0 of 4 answers.

Kester Black in 0 of 4NSI in 0 of 4

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Top nail polish brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and one Google AI Overview, neither Kester Black nor NSI showed up in any of the four answers.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. OPI1st
  2. Sally Hansen2nd
  3. Essie3rd
  4. Essence4th
  5. Gelish–
  6. Kester Black–
  7. Hanami–
  8. NSI–

Mentioned by AI

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

  • OPI4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Sally Hansen4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Essie3 of 4Named in 3 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Essence2 of 4Named in 1 of 3 ChatGPT answersNamed in 1 of 1 Google answers
  • Gelish0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Kester Black0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • Hanami0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers
  • NSI0 of 4Named in 0 of 3 ChatGPT answersNamed in 0 of 1 Google answers

See every answer about nail polish brands

4 answers

  • Asked ChatGPT

    “Which nail polish brand should I buy in New Zealand?”

    1. 1OPI
    2. 2Sally Hansen
    3. 3Essie
    4. 4Essence

  • Asked ChatGPT

    “What are the best nail polish brands in New Zealand?”

    1. 1OPI
    2. 2Essie
    3. 3Sally Hansen

  • Asked ChatGPT

    “What's the best nail polish brand in New Zealand for everyday wear?”

    1. 1Essie
    2. 2Sally Hansen
    3. 3OPI

  • Searched Google, AI Overview

    “best nail polish nz”

    1. 1OPI
    2. 2Sally Hansen
    3. 3Essence

  • Searched Google, AI Overview

    “gel nail polish nz”

    Google showed no AI Overview for this search.

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in New Zealand on October 21, 2026.

Is Kester Black or NSI more popular in search?

This chart shows how often people search Google for Kester Black and NSI by name. Each line represents a brand's share of searches for all eight nail polish brands we track, month by month, from searches in New Zealand.

Kester Black and NSI among nail polish brands in New Zealand, by month

Share of searches by month for Kester Black, NSI. The figures are in the table below the chart.

View monthly share of searches table
MonthGelishOPIEssieEssenceSally HansenKester BlackHanamiNSI
Oct 202545.2%22.2%12.8%9.8%3.9%4.9%1.1%0.1%
Nov 202542.6%21.6%14.9%8.9%4.2%6.6%1.2%0.09%
Dec 202546.8%20.3%12.7%5.3%3.3%10.7%0.73%0.07%
Jan 202646.6%21%14%6.3%3.9%7.1%1%0.08%
Feb 202646.4%25.1%13.2%7.1%3.9%3.4%0.72%0.1%
Mar 202643.1%25.2%13.5%9%3.6%4.9%0.69%0.1%
Apr 202641.8%27.1%16.3%8.8%3.8%1.7%0.39%0.1%
May 202637.7%29.7%16.6%9.1%4.2%2%0.65%0.09%
Jun 202638.9%30%14.6%10.1%3.9%1.7%0.66%0.09%
Jul 202639%26.5%17.3%11.7%3.1%1.6%0.63%0.09%
Aug 202640.4%22.8%17.9%12.5%4%1.7%0.64%0.09%
Sep 202643%21%16%13%4.1%2.1%0.67%0.1%

How has the Kester Black and NSI comparison changed over the last 12 months?

3 findings
  • Kester Black was ahead of NSI in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, Kester Black’s share of searches among nail polish brands in New Zealand moved from 4.9% to 2.1%, and its estimated monthly branded searches moved from 490 to 220.
  • Across the 12 months ending September 2026, NSI’s share of searches among nail polish brands in New Zealand held steady at 0.1%, and its estimated monthly branded searches held steady at 10.

How did search popularity change for New Zealand nail polish brands in September 2026?

1 change

  1. Estimated monthly branded searches for Kester Black in New Zealand fell 55.1% over 12 measured months, from 490 to 220 in September 2026.

How are branded searches counted?

4 search terms

Brandwave collects information about searches that people make online using Kester Black’s and NSI’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.

Kester Black

3 branded search terms

  • kester black
  • kester black nails
  • kesterblack

NSI

1 branded search term

  • nsi gel polish

How the Brand Demand Index is measured

Other head-to-heads among nail polish brands

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