--- title: "Castor vs IQVIA: Which is searched more?" description: "Is Castor or IQVIA more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Clinical trial software 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/castor-edc-vs-iqvia" publisher: "Brandwave" --- # Castor vs IQVIA: Which is searched more? Is Castor or IQVIA more popular in search? Compare estimated monthly branded-search demand and Share of Search inside the Clinical trial software 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**: Castor and IQVIA - **Competitive set**: Clinical trial software - **Market**: Global - **Month measured**: Sep 2026 - **Castor Share of Search**: 1% - **IQVIA Share of Search**: 57% ## Is Castor or IQVIA more popular in search? - In September 2026, IQVIA had more branded searches than Castor among clinical trial software worldwide. IQVIA had about 246,000 branded searches, while Castor had 4,400. IQVIA made up 57% of all clinical trial software searches we track, and Castor accounted for 1%. - IQVIA was ahead of Castor in every measured month of the 12 months ending September 2026. - Across the 12 months ending September 2026, Castor’s share of searches among clinical trial software worldwide moved from 1.2% to 1%, and its estimated monthly branded searches moved from 5.4K to 4.4K. - Across the 12 months ending September 2026, IQVIA’s share of searches among clinical trial software worldwide moved from 56.2% to 57%, and its estimated monthly branded searches held steady at 246K. ## Top clinical trial software in ChatGPT and Google AI Overviews In three ChatGPT questions and two Google AI Overviews, Castor was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. IQVIA did not appear in any of the five 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 | | --- | --- | --- | --- | --- | | Medidata | 1st | 3 of 3 | 2 of 2 | 5 of 5 | | Veeva | 2nd | 2 of 3 | 2 of 2 | 4 of 5 | | REDCap | 3rd | 2 of 3 | 0 of 2 | 2 of 5 | | Castor | 4th | 2 of 3 | 0 of 2 | 2 of 5 | | Oracle Health | 5th | 1 of 3 | 0 of 2 | 1 of 5 | | IQVIA | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | | Clario | Not ranked | 0 of 3 | 0 of 2 | 0 of 5 | ## Every AI answer about clinical trial software - Asked ChatGPT "Which clinical trial platform should I use?": 1. REDCap, 2. Medidata, 3. Castor - Asked ChatGPT "What are the best clinical trial platforms?": 1. Medidata, 2. Veeva, 3. Castor, 4. REDCap, 5. Oracle Health - Asked ChatGPT "What's the best clinical trial platform for a clinical research team?": 1. Veeva, 2. Medidata - Searched Google, AI Overview "clinical trial software": 1. Medidata, 2. Veeva - Searched Google, AI Overview "clinical research software": 1. Medidata, 2. Veeva Not named in any answer: IQVIA and Clario. 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 clinical trial software worldwide in September 2026? - In September 2026, IQVIA gained share of searches among clinical trial software worldwide, from 53.6% to 57%. - Estimated monthly branded searches for Castor worldwide fell 18.5% over 12 measured months, from 5.4K to 4.4K in September 2026. ## Month by month | Month | Castor estimated searches | Castor Share of Search | Castor rank | IQVIA estimated searches | IQVIA Share of Search | IQVIA rank | | --- | --- | --- | --- | --- | --- | --- | | Oct 2025 | 5.4K | 1.2% | 7 | 246K | 56.2% | 1 | | Nov 2025 | 5.4K | 1.3% | 7 | 246K | 60.9% | 1 | | Dec 2025 | 4.4K | 1.3% | 7 | 201K | 57.6% | 1 | | Jan 2026 | 5.4K | 1.3% | 7 | 246K | 57.7% | 1 | | Feb 2026 | 4.4K | 1.1% | 7 | 246K | 59% | 1 | | Mar 2026 | 5.4K | 1.2% | 7 | 246K | 56.9% | 1 | | Apr 2026 | 5.4K | 1.3% | 7 | 246K | 58.4% | 1 | | May 2026 | 4.4K | 1.2% | 7 | 201K | 55.5% | 1 | | Jun 2026 | 4.4K | 1.1% | 7 | 201K | 52% | 1 | | Jul 2026 | 4.4K | 1.1% | 7 | 201K | 52% | 1 | | Aug 2026 | 3.6K | 0.96% | 7 | 201K | 53.6% | 1 | | Sep 2026 | 4.4K | 1% | 7 | 246K | 57% | 1 | ## How each brand is measured Brandwave collects information about searches that people make online using Castor’s and IQVIA’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. - **Castor**: Measured on the search term “castor edc”. - **IQVIA**: Measured on the search term “iqvia”. - [Castor profile](/demand/global-en/brands/castor-edc) - [IQVIA profile](/demand/global-en/brands/iqvia) - [All clinical trial software worldwide](/demand/global-en/categories/clinical-trial-software): The set both shares are measured inside, 7 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 Castor or IQVIA more popular in search? In September 2026, IQVIA had more branded searches than Castor among clinical trial software worldwide. IQVIA had about 246,000 branded searches, while Castor had 4,400. IQVIA made up 57% of all clinical trial software searches we track, and Castor accounted for 1%. ## Cite this page Brandwave. "Castor vs IQVIA: Which is searched more?". https://gobrandwave.com/demand/global-en/compare/castor-edc-vs-iqvia This page is also available as HTML at https://gobrandwave.com/demand/global-en/compare/castor-edc-vs-iqvia. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.