--- title: "Castelli vs Lululemon: Which is searched more?" description: "Is Castelli or Lululemon more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Bike shorts brands set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time." canonical: "https://gobrandwave.com/demand/global-en/compare/castelli-vs-lululemon" publisher: "Brandwave" --- # Castelli vs Lululemon: Which is searched more? Is Castelli or Lululemon more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Bike shorts brands set worldwide. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time. ## Key facts - **Compared**: Castelli and Lululemon - **Competitive set**: Bike shorts brands - **Market**: Global - **Month measured**: Sep 2026 - **Castelli Share of Search**: 24.4% - **Lululemon Share of Search**: 0.8% ## Is Castelli or Lululemon more popular in search? - In September 2026, Castelli had more branded searches than Lululemon among bike shorts brands worldwide. Castelli had about 110,000 branded searches, while Lululemon had 3,600. Castelli made up 24.4% of all bike shorts brand searches we track, and Lululemon accounted for 0.8%. - Castelli was ahead of Lululemon in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, Castelli’s share of searches among bike shorts brands worldwide moved from 26.7% to 24.4%, and its estimated monthly branded searches moved from 135K to 110K. - Across the 12 months ending September 2026, Lululemon’s share of searches among bike shorts brands worldwide moved from 0.71% to 0.8%, and its estimated monthly branded searches held steady at 3.6K. ## Top bike shorts brands in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Castelli was mentioned in four out of five: in two of the three ChatGPT answers and in both Google AI Overviews. Lululemon was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Castelli and Lululemon were each listed first in two of the four answers. Brands get a higher AI rank if they are mentioned earlier in the answers that list options. | Brand | AI rank | ChatGPT answers that named it | Google AI Overviews that named it | All answers that named it | | --- | --- | --- | --- | --- | | Assos | 1st | 1 of 3 | 2 of 2 | 3 of 5 | | Castelli | 2nd | 2 of 3 | 2 of 2 | 4 of 5 | | Rapha | 3rd | 2 of 3 | 2 of 2 | 4 of 5 | | Lululemon | 4th | 2 of 3 | 0 of 2 | 2 of 5 | | Pearl Izumi | 5th | 2 of 3 | 1 of 2 | 3 of 5 | | Baleaf | 6th | 2 of 3 | 0 of 2 | 2 of 5 | ## Every AI answer about bike shorts brands - Asked ChatGPT "Which bike shorts brand should I buy?": 1. Lululemon, 2. Baleaf - Asked ChatGPT "What are the best bike shorts brands?": 1. Rapha, 2. Pearl Izumi, 3. Lululemon, 4. Castelli, 5. Baleaf - Asked ChatGPT "What's the best bike shorts brand for long distance comfort?": 1. Assos, 2. Castelli, 3. Rapha, 4. Pearl Izumi - Searched Google, AI Overview "best bike shorts": 1. Assos, 2. Rapha, 3. Castelli - Searched Google, AI Overview "bike shorts for men": 1. Assos, 2. Castelli, 3. Pearl Izumi, 4. Rapha Brands are listed in the order each answer named them. The answers were collected in the United States on October 20, 2026. ## How did search popularity change for bike shorts brands worldwide in September 2026? - In September 2026, Castelli lost share of searches among bike shorts brands worldwide, from 24.9% to 24.4%. ## Month by month | Month | Castelli estimated searches | Castelli Share of Search | Castelli rank | Lululemon estimated searches | Lululemon Share of Search | Lululemon rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 135K | 26.7% | 3 | 3.6K | 0.71% | 6 | | Nov 2025 | 135K | 23% | 3 | 3.6K | 0.61% | 6 | | Dec 2025 | 110K | 22.8% | 3 | 2.9K | 0.6% | 6 | | Jan 2026 | 135K | 26.6% | 3 | 3.6K | 0.71% | 6 | | Feb 2026 | 135K | 30.3% | 2 | 2.9K | 0.65% | 6 | | Mar 2026 | 135K | 24.6% | 3 | 3.6K | 0.65% | 6 | | Apr 2026 | 165K | 28.5% | 2 | 3.6K | 0.62% | 6 | | May 2026 | 165K | 26.4% | 3 | 4.4K | 0.71% | 6 | | Jun 2026 | 135K | 24.5% | 3 | 4.4K | 0.8% | 6 | | Jul 2026 | 135K | 21.4% | 3 | 4.4K | 0.7% | 6 | | Aug 2026 | 165K | 24.9% | 3 | 4.4K | 0.67% | 6 | | Sep 2026 | 110K | 24.4% | 3 | 3.6K | 0.8% | 6 | ## How each brand is measured Brandwave collects information about searches that people make online using Castelli’s and Lululemon’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. - **Castelli**: Measured on the search term “castelli”. - **Lululemon**: Measured on the search term “lululemon bike shorts”. - [Castelli profile](/demand/global-en/brands/castelli) - [Lululemon profile](/demand/global-en/brands/lululemon) - [All bike shorts brands worldwide](/demand/global-en/categories/bike-shorts-brands): The set both shares are measured inside, 6 brands. ## Methodology - [How is the Brand Demand Index measured?](/demand/methodology): Where the figures come from, what they compare, and how they may be reused. ## Frequently asked questions ### Is Castelli or Lululemon more popular in search? In September 2026, Castelli had more branded searches than Lululemon among bike shorts brands worldwide. Castelli had about 110,000 branded searches, while Lululemon had 3,600. Castelli made up 24.4% of all bike shorts brand searches we track, and Lululemon accounted for 0.8%. ## Cite this page Brandwave. "Castelli vs Lululemon: Which is searched more?". https://gobrandwave.com/demand/global-en/compare/castelli-vs-lululemon This page is also available as HTML at https://gobrandwave.com/demand/global-en/compare/castelli-vs-lululemon. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.