Knix vs Stayfree:Which is more popular?
In September 2026, Knix had more branded searches than Stayfree among period care brands worldwide. Knix had about 172,000 branded searches, while Stayfree had 90,500. Knix made up 39.1% of all period care brand searches we track, and Stayfree accounted for 20.6%. When we asked ChatGPT and Google AI Overviews about period care brands, Knix appeared in two of the five answers and Stayfree in none.
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Top period care brands in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Knix was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Stayfree 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.
Rael5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
Cora4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
L.3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Always3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
Knix2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Saalt2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Stayfree0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Modibodi0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Thinx0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
Libra0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about period care brands
5 answers
Asked ChatGPT
“Which period care brand should I buy?”
Asked ChatGPT
“What are the best period care brands?”
Asked ChatGPT
“What's the best period care brand for monthly protection?”
Searched Google, AI Overview
“tampon brands”
Searched Google, AI Overview
“pad brands”
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is Knix or Stayfree more popular in search?
This chart shows how often people search Google for Knix and Stayfree by name. Each line represents a brand's share of searches for all ten period care brands we track, month by month, from English-language searches worldwide.
Share of searches by month for Knix, Stayfree. The figures are in the table below the chart.
View monthly share of searches table
| Month | Knix | Stayfree | Modibodi | Saalt | Cora | Thinx | Rael | L. | Libra | Always |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 33.8% | 22.6% | 17.6% | 5.8% | 4.6% | 7.8% | 5.6% | 1.9% | 0.17% | 0.15% |
| Nov 2025 | 44.3% | 17.5% | 16.8% | 5.3% | 3.5% | 7.5% | 3.5% | 1.4% | 0.07% | 0.09% |
| Dec 2025 | 36.9% | 20.1% | 16.6% | 7.2% | 4.1% | 10% | 3.3% | 1.6% | 0.08% | 0.11% |
| Jan 2026 | 38.9% | 17.3% | 16.5% | 5.9% | 3.5% | 12.3% | 3.5% | 1.9% | 0.08% | 0.11% |
| Feb 2026 | 37.9% | 16.7% | 13.2% | 5.6% | 3.4% | 18% | 3.4% | 1.6% | 0.09% | 0.11% |
| Mar 2026 | 37.7% | 19.5% | 12.5% | 6.8% | 3.9% | 13.1% | 4.8% | 1.5% | 0.09% | 0.1% |
| Apr 2026 | 42.3% | 17.1% | 12.1% | 6.3% | 3.5% | 13% | 4.2% | 1.3% | 0.07% | 0.09% |
| May 2026 | 36.2% | 16.3% | 17.9% | 6.8% | 4% | 14.4% | 2.7% | 1.5% | 0.07% | 0.11% |
| Jun 2026 | 38.4% | 15.1% | 18.1% | 6.8% | 3.7% | 13.2% | 3.1% | 1.4% | 0.05% | 0.08% |
| Jul 2026 | 41.5% | 14.3% | 15.6% | 7.3% | 4.3% | 12.2% | 2.9% | 1.7% | 0.06% | 0.08% |
| Aug 2026 | 41.8% | 17.5% | 14.2% | 7.7% | 5.3% | 7.9% | 2.9% | 2.5% | 0.1% | 0.11% |
| Sep 2026 | 39.1% | 20.6% | 13.8% | 7.2% | 6.2% | 5.7% | 4.1% | 2.8% | 0.23% | 0.13% |
How has the Knix and Stayfree comparison changed over the last 12 months?
3 findings
- Knix was ahead of Stayfree in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Knix’s share of searches among period care brands worldwide moved from 33.8% to 39.1%, and its estimated monthly branded searches moved from 135K to 172K.
- Across the 12 months ending September 2026, Stayfree’s share of searches among period care brands worldwide moved from 22.6% to 20.6%, and its estimated monthly branded searches held steady at 90.5K.
How did search popularity change for period care brands worldwide in September 2026?
2 changes
In September 2026, Stayfree gained share of searches among period care brands worldwide, from 17.5% to 20.6%.
In September 2026, Knix lost share of searches among period care brands worldwide, from 41.8% to 39.1%.
How are branded searches counted?
6 search terms
Brandwave collects information about searches that people make online using Knix’s and Stayfree’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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