Brandwave

ChatPDF vs PDF.ai:Which is more popular?

In September 2026, ChatPDF had more branded searches than PDF.ai among AI PDF tools worldwide. ChatPDF had about 246,000 branded searches, while PDF.ai had 14,800. ChatPDF made up 0.87% of all AI PDF tool searches we track, and PDF.ai accounted for 0.05%. When we asked ChatGPT and Google AI Overviews about AI PDF tools, ChatPDF appeared in all five answers and PDF.ai in none.

Among AI PDF tools worldwide in September 2026

Who do people search for more?

ChatPDF, about 17 searches for every 1 for PDF.ai

ChatPDF 246K searchesPDF.ai 14.8K searches

Who does AI mention more?

ChatPDF, mentioned in every answer we collected

ChatPDF in 5 of 5PDF.ai in 0 of 5

Who does AI recommend more?

ChatPDF, the only one of the two named

ChatPDF first in 5PDF.ai never named

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Top AI PDF tools in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, ChatPDF appeared in all five answers. PDF.ai 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.

  1. Adobe Acrobat1st
  2. NotebookLM2nd
  3. ChatPDF3rd
  4. Humata–
  5. PDF.ai–
  6. AskYourPDF–
  7. Documind–

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • Adobe Acrobat5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • ChatPDF5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • NotebookLM3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Humata0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • PDF.ai0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • AskYourPDF0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
  • Documind0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers

See every answer about AI PDF tools

5 answers

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 20, 2026.

Is ChatPDF or PDF.ai more popular in search?

This chart shows how often people search Google for ChatPDF and PDF.ai by name. Each line represents a brand's share of searches for all seven AI PDF tools we track, month by month, from English-language searches worldwide.

ChatPDF and PDF.ai among AI PDF tools worldwide, by month

Share of searches by month for ChatPDF, PDF.ai. The figures are in the table below the chart.

View monthly share of searches table
MonthNotebookLMAdobe AcrobatChatPDFHumataPDF.aiAskYourPDFDocumind
Oct 202567.1%27.6%4.7%0.23%0.28%0.08%<0.01%
Nov 202573.4%21.7%4.4%0.18%0.21%0.08%<0.01%
Dec 202579.8%17.7%2.2%0.11%0.16%0.05%<0.01%
Jan 202681.1%17.2%1.5%0.07%0.11%0.04%<0.01%
Feb 202679.6%18.7%1.5%0.09%0.11%0.03%<0.01%
Mar 202683.8%14.4%1.5%0.08%0.11%0.03%<0.01%
Apr 202687%11.2%1.6%0.08%0.1%0.03%<0.01%
May 202686.9%11.6%1.3%0.05%0.08%0.02%<0.01%
Jun 202685.3%13.5%1%0.05%0.08%0.02%<0.01%
Jul 202682.7%16.3%0.86%0.04%0.08%0.02%<0.01%
Aug 202685.1%13.9%0.86%0.05%0.06%0.01%<0.01%
Sep 202686.2%12.8%0.87%0.05%0.05%0.01%<0.01%

How has the ChatPDF and PDF.ai comparison changed over the last 12 months?

3 findings
  • ChatPDF was ahead of PDF.ai in every measured month of the 12 months ending September 2026.
  • Across the 12 months ending September 2026, ChatPDF’s share of searches among AI PDF tools worldwide moved from 4.7% to 0.87%, and its estimated monthly branded searches moved from 823K to 246K.
  • Across the 12 months ending September 2026, PDF.ai’s share of searches among AI PDF tools worldwide moved from 0.28% to 0.05%, and its estimated monthly branded searches moved from 49.5K to 14.8K.

How did search popularity change for AI PDF tools worldwide in September 2026?

2 changes

  1. In September 2026, PDF.ai fell from 4th to 5th among AI PDF tools worldwide.

  2. Estimated monthly branded searches for ChatPDF worldwide fell 70.1% over 12 measured months, from 823K to 246K in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using ChatPDF’s and PDF.ai’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.

ChatPDF

1 branded search term

  • chatpdf

PDF.ai

1 branded search term

  • pdfai

How the Brand Demand Index is measured

Other head-to-heads among AI PDF tools

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