--- title: "AI PDF tools: Which are searched most?" description: "Compare the tools used to question and summarise PDFs. Share of Search among NotebookLM, Adobe Acrobat, ChatPDF, Humata, PDF.ai, AskYourPDF and Documind, the AI PDF tools Brandwave compares worldwide, using the same methodology, market, and reporting period. 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/categories/ai-pdf-tools" publisher: "Brandwave" --- # AI PDF tools: Which are searched most? Compare the tools used to question and summarise PDFs. Share of Search among NotebookLM, Adobe Acrobat, ChatPDF, Humata, PDF.ai, AskYourPDF and Documind, the AI PDF tools Brandwave compares worldwide, using the same methodology, market, and reporting period. 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 - **Competitive set**: AI PDF tools - **Market**: Global - **Brands compared**: 7 - **Month measured**: Sep 2026 - **Highest Share of Search**: NotebookLM, 86.2% ## Which brand is most popular in search among AI PDF tools worldwide? - In September 2026, NotebookLM was the most searched among AI PDF tools worldwide, with an estimated 24.5M branded searches, 86.2% of all searches for the seven we track. - Adobe Acrobat is in 2nd place, 73.4 percentage points behind at 12.8%. - Across the 12 months ending September 2026, NotebookLM’s share of searches among AI PDF tools worldwide increased from 67.1% to 86.2%. - Across the 12 months ending September 2026, Adobe Acrobat’s share of searches among AI PDF tools worldwide decreased from 27.6% to 12.8%. - Across the 12 months ending September 2026, ChatPDF’s share of searches among AI PDF tools worldwide decreased from 4.7% to 0.87%. - Across the 12 months ending September 2026, NotebookLM’s share of searches among AI PDF tools worldwide peaked at 87% in April 2026 and was lowest at 67.1% in October 2025. - Across the 12 months ending September 2026, Adobe Acrobat’s share of searches among AI PDF tools worldwide peaked at 27.6% in October 2025 and was lowest at 11.2% in April 2026. - Across the 12 months ending September 2026, ChatPDF’s share of searches among AI PDF tools worldwide peaked at 4.7% in October 2025 and was lowest at 0.86% in August 2026. - Across the 12 months ending September 2026, Humata rose from 5th to 4th among AI PDF tools worldwide. - Across the 12 months ending September 2026, PDF.ai fell from 4th to 5th among AI PDF tools worldwide. - Across the 12 months ending September 2026, AskYourPDF and Documind held steady: their share of searches among AI PDF tools worldwide each moved less than 0.5 percentage points. ## Compare search popularity between leading brands - [NotebookLM vs Adobe Acrobat: compare search popularity](/demand/global-en/compare/adobe-acrobat-vs-notebooklm): 86.2% against 12.8% Share of Search. ## How did search popularity change for AI PDF tools worldwide in September 2026? - In September 2026, NotebookLM gained share of searches among AI PDF tools worldwide, from 85.1% to 86.2%. - In September 2026, Adobe Acrobat lost share of searches among AI PDF tools worldwide, from 13.9% to 12.8%. - In September 2026, Humata rose from 5th to 4th among AI PDF tools worldwide. - In September 2026, PDF.ai fell from 4th to 5th among AI PDF tools worldwide. - Estimated monthly branded searches for AskYourPDF worldwide fell 80.4% over 12 measured months, from 14.8K to 2.9K in September 2026. - Estimated monthly branded searches for ChatPDF worldwide fell 70.1% over 12 measured months, from 823K to 246K in September 2026. - Estimated monthly branded searches for Documind worldwide fell 28% over 12 measured months, from 1K to 720 in September 2026. ## Share of Search ranking | Rank | Brand | Share of Search | Estimated monthly branded searches | Change vs prior month | Owned by | | --- | --- | --- | --- | --- | --- | | 1 | NotebookLM | 86.2% | 24.5M | +22.8% | Google | | 2 | Adobe Acrobat | 12.8% | 3.6M | +11.6% | Adobe | | 3 | ChatPDF | 0.87% | 246K | +22.4% | ChatPDF | | 4 | Humata | 0.05% | 14.8K | +22.3% | Humata | | 5 | PDF.ai | 0.05% | 14.8K | 0.0% | PDF.ai | | 6 | AskYourPDF | 0.01% | 2.9K | +20.8% | AskYourPDF | | 7 | Documind | <0.01% | 720 | 0.0% | Documind | ## Historical estimated branded-search demand | Month | Brand | Estimated monthly branded searches | Share of Search | Rank | | --- | --- | --- | --- | --- | | Oct 2025 | NotebookLM | 11.9M | 67.1% | 1 | | Oct 2025 | Adobe Acrobat | 4.9M | 27.6% | 2 | | Oct 2025 | ChatPDF | 823K | 4.7% | 3 | | Oct 2025 | PDF.ai | 49.5K | 0.28% | 4 | | Oct 2025 | Humata | 40.5K | 0.23% | 5 | | Oct 2025 | AskYourPDF | 14.8K | 0.08% | 6 | | Oct 2025 | Documind | 1K | <0.01% | 7 | | Nov 2025 | NotebookLM | 13.8M | 73.4% | 1 | | Nov 2025 | Adobe Acrobat | 4.1M | 21.7% | 2 | | Nov 2025 | ChatPDF | 823K | 4.4% | 3 | | Nov 2025 | PDF.ai | 40.5K | 0.21% | 4 | | Nov 2025 | Humata | 33.1K | 0.18% | 5 | | Nov 2025 | AskYourPDF | 14.8K | 0.08% | 6 | | Nov 2025 | Documind | 880 | <0.01% | 7 | | Dec 2025 | NotebookLM | 16.3M | 79.8% | 1 | | Dec 2025 | Adobe Acrobat | 3.6M | 17.7% | 2 | | Dec 2025 | ChatPDF | 450K | 2.2% | 3 | | Dec 2025 | PDF.ai | 33.1K | 0.16% | 4 | | Dec 2025 | Humata | 22.2K | 0.11% | 5 | | Dec 2025 | AskYourPDF | 9.9K | 0.05% | 6 | | Dec 2025 | Documind | 720 | <0.01% | 7 | | Jan 2026 | NotebookLM | 19.9M | 81.1% | 1 | | Jan 2026 | Adobe Acrobat | 4.2M | 17.2% | 2 | | Jan 2026 | ChatPDF | 368K | 1.5% | 3 | | Jan 2026 | PDF.ai | 27.1K | 0.11% | 4 | | Jan 2026 | Humata | 18.1K | 0.07% | 5 | | Jan 2026 | AskYourPDF | 9.9K | 0.04% | 6 | | Jan 2026 | Documind | 880 | <0.01% | 7 | | Feb 2026 | NotebookLM | 19.9M | 79.6% | 1 | | Feb 2026 | Adobe Acrobat | 4.7M | 18.7% | 2 | | Feb 2026 | ChatPDF | 368K | 1.5% | 3 | | Feb 2026 | PDF.ai | 27.1K | 0.11% | 4 | | Feb 2026 | Humata | 22.2K | 0.09% | 5 | | Feb 2026 | AskYourPDF | 8.1K | 0.03% | 6 | | Feb 2026 | Documind | 720 | <0.01% | 7 | | Mar 2026 | NotebookLM | 24.5M | 83.8% | 1 | | Mar 2026 | Adobe Acrobat | 4.2M | 14.4% | 2 | | Mar 2026 | ChatPDF | 450K | 1.5% | 3 | | Mar 2026 | PDF.ai | 33.1K | 0.11% | 4 | | Mar 2026 | Humata | 22.2K | 0.08% | 5 | | Mar 2026 | AskYourPDF | 8.1K | 0.03% | 6 | | Mar 2026 | Documind | 1K | <0.01% | 7 | | Apr 2026 | NotebookLM | 29.9M | 87% | 1 | | Apr 2026 | Adobe Acrobat | 3.8M | 11.2% | 2 | | Apr 2026 | ChatPDF | 550K | 1.6% | 3 | | Apr 2026 | PDF.ai | 33.1K | 0.1% | 4 | | Apr 2026 | Humata | 27.1K | 0.08% | 5 | | Apr 2026 | AskYourPDF | 9.9K | 0.03% | 6 | | Apr 2026 | Documind | 1K | <0.01% | 7 | | May 2026 | NotebookLM | 29.9M | 86.9% | 1 | | May 2026 | Adobe Acrobat | 4M | 11.6% | 2 | | May 2026 | ChatPDF | 450K | 1.3% | 3 | | May 2026 | PDF.ai | 27.1K | 0.08% | 4 | | May 2026 | Humata | 18.1K | 0.05% | 5 | | May 2026 | AskYourPDF | 6.6K | 0.02% | 6 | | May 2026 | Documind | 880 | <0.01% | 7 | | Jun 2026 | NotebookLM | 24.5M | 85.3% | 1 | | Jun 2026 | Adobe Acrobat | 3.9M | 13.5% | 2 | | Jun 2026 | ChatPDF | 301K | 1% | 3 | | Jun 2026 | PDF.ai | 22.2K | 0.08% | 4 | | Jun 2026 | Humata | 14.8K | 0.05% | 5 | | Jun 2026 | AskYourPDF | 4.4K | 0.02% | 6 | | Jun 2026 | Documind | 880 | <0.01% | 7 | | Jul 2026 | NotebookLM | 19.3M | 82.7% | 1 | | Jul 2026 | Adobe Acrobat | 3.8M | 16.3% | 2 | | Jul 2026 | ChatPDF | 201K | 0.86% | 3 | | Jul 2026 | PDF.ai | 18.1K | 0.08% | 4 | | Jul 2026 | Humata | 9.9K | 0.04% | 5 | | Jul 2026 | AskYourPDF | 3.6K | 0.02% | 6 | | Jul 2026 | Documind | 720 | <0.01% | 7 | | Aug 2026 | NotebookLM | 19.9M | 85.1% | 1 | | Aug 2026 | Adobe Acrobat | 3.3M | 13.9% | 2 | | Aug 2026 | ChatPDF | 201K | 0.86% | 3 | | Aug 2026 | PDF.ai | 14.8K | 0.06% | 4 | | Aug 2026 | Humata | 12.1K | 0.05% | 5 | | Aug 2026 | AskYourPDF | 2.4K | 0.01% | 6 | | Aug 2026 | Documind | 720 | <0.01% | 7 | | Sep 2026 | NotebookLM | 24.5M | 86.2% | 1 | | Sep 2026 | Adobe Acrobat | 3.6M | 12.8% | 2 | | Sep 2026 | ChatPDF | 246K | 0.87% | 3 | | Sep 2026 | Humata | 14.8K | 0.05% | 4 | | Sep 2026 | PDF.ai | 14.8K | 0.05% | 5 | | Sep 2026 | AskYourPDF | 2.9K | 0.01% | 6 | | Sep 2026 | Documind | 720 | <0.01% | 7 | ## What is being compared - **Adobe Acrobat**: Measured on the search terms “acrobat reader”, “adobe acrobat”, “adobe acrobat reader” and “adobe reader”, summed into one figure. - **AskYourPDF**: Measured on the search term “askyourpdf”. - **ChatPDF**: Measured on the search term “chatpdf”. - **Documind**: Measured on the search term “documind”. - **Humata**: Measured on the search term “humata”. - **NotebookLM**: Measured on the search terms “notebook lm” and “notebooklm”, summed into one figure. - **PDF.ai**: Measured on the search term “pdfai”. - [Adobe Acrobat](/demand/global-en/brands/adobe-acrobat) - [AskYourPDF](/demand/global-en/brands/askyourpdf) - [ChatPDF](/demand/global-en/brands/chatpdf) - [Documind](/demand/global-en/brands/documind) - [Humata](/demand/global-en/brands/humata) - [NotebookLM](/demand/global-en/brands/notebooklm) - [PDF.ai](/demand/global-en/brands/pdf-ai) ## 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 ### Which brand is most popular in search among AI PDF tools worldwide? In September 2026, NotebookLM was the most searched among AI PDF tools worldwide, with an estimated 24.5M branded searches, 86.2% of all searches for the seven we track. These are worldwide searches for English-language branded terms. ## Cite this page Brandwave. "AI PDF tools: Which are searched most?". https://gobrandwave.com/demand/global-en/categories/ai-pdf-tools This page is also available as HTML at https://gobrandwave.com/demand/global-en/categories/ai-pdf-tools. Brandwave publishes an index of its Markdown pages at https://gobrandwave.com/llms.txt.