COSRX vs Isntree:Which is more popular?
In October 2026, COSRX had more branded searches than Isntree among Korean sunscreen brands worldwide. COSRX had about 27,100 branded searches, while Isntree had 18,100. COSRX made up 3.9% of all Korean sunscreen brand searches we track, and Isntree accounted for 2.6%. When we asked ChatGPT and Google AI Overviews about Korean sunscreen brands, Isntree appeared in three of the five answers and COSRX in two. Isntree was mentioned before COSRX in three out of five answers.
Who do people search for more?
COSRX, about 50% more searches than Isntree
Who does AI mention more?
Isntree, mentioned in 3 of 5 answers, COSRX in 2
Who does AI recommend more?
Isntree, named ahead of COSRX in 3 of 5 answers
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Top Korean sunscreen brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Isntree was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. COSRX was mentioned in two out of five: not in any of the three ChatGPT answers, but in both Google AI Overviews. Isntree was listed before COSRX in three out of 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.
Beauty of Joseon5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
SKIN10044 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Round Lab3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers- Isntree3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- COSRX2 of 5Named in 0 of 3 ChatGPT answersNamed in 2 of 2 Google answers
haruharu wonder1 of 5Named in 0 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Torriden1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Anua0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Purito Seoul0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
MISSHA0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about Korean sunscreen brands
5 answers
Asked ChatGPT
“Which Korean sunscreen should I buy?”
Asked ChatGPT
“What are the best Korean sunscreen brands?”
Asked ChatGPT
“What's the best Korean sunscreen for oily skin?”
Searched Google, AI Overview
“korean sunscreen”
Searched Google, AI Overview
“best korean sunscreen”
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.
Is COSRX or Isntree more popular in search?
This chart shows how often people search Google for COSRX and Isntree by name. Each line represents a brand's share of searches for all 11 Korean sunscreen brands we track, month by month, from English-language searches worldwide.
Share of searches by month for COSRX, Isntree. The figures are in the table below the chart.
View monthly share of searches table
| Month | Beauty of Joseon | Round Lab | SKIN1004 | Anua | COSRX | haruharu wonder | Isntree | Purito Seoul | MISSHA | AXIS-Y | Torriden |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 2025 | 64.1% | 8.6% | 10.5% | 2.6% | 3.9% | 2.6% | 3.2% | 1.7% | 1.4% | 0.94% | 0.51% |
| Dec 2025 | 60.9% | 10% | 10% | 3% | 4.5% | 3% | 3.7% | 1.6% | 1.6% | 1.1% | 0.59% |
| Jan 2026 | 62.8% | 8.4% | 10.3% | 3.1% | 4.6% | 3.1% | 3.1% | 1.7% | 1.4% | 0.92% | 0.6% |
| Feb 2026 | 62.6% | 10.3% | 8.4% | 3.1% | 4.6% | 3.1% | 3.1% | 1.7% | 1.7% | 0.91% | 0.6% |
| Mar 2026 | 60.2% | 9.9% | 9.9% | 3.6% | 4.4% | 3% | 3.6% | 2% | 1.6% | 1.1% | 0.72% |
| Apr 2026 | 60% | 9.9% | 9.9% | 3.6% | 4.4% | 3% | 3.6% | 2% | 1.6% | 1.1% | 1.1% |
| May 2026 | 59% | 9.7% | 9.7% | 4.3% | 5.3% | 2.9% | 2.9% | 1.9% | 1.6% | 1.1% | 1.6% |
| Jun 2026 | 60.2% | 9.9% | 9.9% | 4.4% | 4.4% | 3% | 2.4% | 2% | 1.3% | 1.1% | 1.3% |
| Jul 2026 | 57.3% | 11.5% | 9.4% | 5.2% | 4.2% | 3.5% | 2.8% | 2.3% | 1.5% | 1.3% | 1% |
| Aug 2026 | 59.3% | 9.7% | 9.7% | 4.4% | 5.3% | 2.9% | 2.9% | 1.9% | 1.6% | 1.1% | 1.1% |
| Sep 2026 | 62.7% | 10.3% | 8.4% | 3.8% | 4.6% | 2.5% | 2.5% | 1.7% | 1.4% | 0.92% | 1.1% |
| Oct 2026 | 64.4% | 8.7% | 8.7% | 3.9% | 3.9% | 3.2% | 2.6% | 1.7% | 1.2% | 0.94% | 0.94% |
COSRX sells other things too, so only its searches that name this product count here, like “cosrx sunscreen”.
How has branded search for COSRX and Isntree changed worldwide over the last 12 months?
3 findings
- COSRX was ahead of Isntree in every measured month of the 12 months ending October 2026.
- Across the 12 months ending October 2026, COSRX’s share of searches among Korean sunscreen brands worldwide held steady at 3.9%, and its estimated monthly branded searches moved from 18.1K to 27.1K.
- Across the 12 months ending October 2026, Isntree’s share of searches among Korean sunscreen brands worldwide moved from 3.2% to 2.6%, and its estimated monthly branded searches moved from 14.8K to 18.1K.
How did search popularity change for Korean sunscreen brands worldwide in October 2026?
2 changes
In October 2026, COSRX lost share of searches among Korean sunscreen brands worldwide, from 4.6% to 3.9%.
Estimated monthly branded searches for Isntree worldwide rose 22.3% over 12 measured months, from 14.8K to 18.1K in October 2026.
How are COSRX’s and Isntree’s branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using COSRX’s and Isntree’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.
Other head-to-heads among Korean sunscreen brands
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