ChatPDF vs NotebookLM vs Open Notebook vs LightPDF

Which one fits you in 2026? Traffic, pricing, input → output, tasks and community side by side.

Your tool
ChatPDF
vs
Competitor 1
NotebookLM
Competitor 2
ONOpen Notebook
Competitor 3
LightPDF
Compare
4 tools · best value per row highlighted
Your tool ChatPDF
chatpdf.com
ChatPDF is a document question-answering app: upload a PDF, ask questions in plain language, and get answers with built-in citations that point back to the source passage.
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Competitor NotebookLM
notebooklm.google.com
Your docs, deeply understood
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Competitor ONOpen Notebook
open-notebook.ai
Open Notebook is an open-source AI note-taking and research platform built around privacy.
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Competitor LightPDF
lightpdf.com
LightPDF AI for Docs is an online tool that utilizes artificial intelligence to summarize and extract insights from uploaded PDF, Word, Excel, and PPT documents. With multi-platform availability and s
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Traffic estimated monthly website traffic
Monthly visits
—
159.8Mvisits/mo
—
1.8Mvisits/mo
MoM change
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▼ 26.8%
—
▲ 1.0%
6-month growth
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-14.7%
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-4.4%
Global rank web
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—
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#34,433
Avg. last 3 months
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210.3M
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1.7M
Bounce rate lower is better
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32%
—
51%
Pages / visit
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5.0
—
2.3
Visit duration
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6m 32s
—
1m 31s
Traffic sources
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● Direct 81% · ● Referral 17%
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● Direct 88% · ● Referral 10%
ChatPDFNotebookLMOpen NotebookLightPDF
063.2M126.5M189.7M253MNotebookLM · 121.9MNotebookLM · 141.5MNotebookLM · 177.5MNotebookLM · 187.3MNotebookLM · 222.2MNotebookLM · 247.4MNotebookLM · 253MNotebookLM · 218.2MNotebookLM · 159.8MLightPDF · 1.6MLightPDF · 1.6MLightPDF · 1.9MLightPDF · 1.7MLightPDF · 1.9MLightPDF · 1.9MLightPDF · 1.8MLightPDF · 1.5MLightPDF · 1.8MLightPDF · 1.8M1M10M100M1BNotebookLM · 121.9MNotebookLM · 141.5MNotebookLM · 177.5MNotebookLM · 187.3MNotebookLM · 222.2MNotebookLM · 247.4MNotebookLM · 253MNotebookLM · 218.2MNotebookLM · 159.8MLightPDF · 1.6MLightPDF · 1.6MLightPDF · 1.9MLightPDF · 1.7MLightPDF · 1.9MLightPDF · 1.9MLightPDF · 1.8MLightPDF · 1.5MLightPDF · 1.8MLightPDF · 1.8MNov '25DecJan '26FebMarAprMayJunJulAug
Pricing
Model
Free
Freemium
Free
Freemium
Starting price
Free
$4.99per month · free tier available
Free
$1.33per month · free tier available
Free tier
Free trial
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API access
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Plans
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Free FreeGoogle AI Plus $4.99/moNotebookLM Pro (Google AI Pro) $19.99/moVia Google AI Ultra $99.99/mo
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Free FreeMonthly $5.99/moYearly $15.99/yrLifetime $39.99
Capabilities input → output
Input
Web pagesTextDocuments
DocumentsTextWeb pagesAudio
Web pagesTextDocuments
Web pagesDocuments
Output
Text
AudioTextVideo
TextAudio
Text
Skill level
Beginner-friendly
Beginner-friendly
Beginner-friendly
Beginner-friendly
Categories
Education & LearningProductivity & OfficeResearch & AnalyticsWriting & Content+4 more
Productivity & OfficeResearch & AnalyticsVideo EditingVoice & Speech+5 more
Productivity & OfficeResearch & AnalyticsVoice & SpeechAI Note Taker+2 more
Productivity & OfficeWriting & ContentAI Document ExtractionAI PDF+1 more
Tasks what each tool can do · 1 shared · core   partial
Tasks covered
12
8
8
9
Summarizing
PDF analysis
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Research
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Document summarization
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PDFs
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Note taking
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Podcasts
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Video summaries
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Data extraction
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Document data extraction
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Interactive PDF processing
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OCR
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PDF summaries
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PDF translations
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Self hosted
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Text extraction
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Text to podcast
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Academic research
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Document processing
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Document reading
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Files
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Homework assistance
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Productivity
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Summaries
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Community on aitoolstime
Rating
no ratings yet
no ratings yet
no ratings yet
no ratings yet
Upvotes
▲ 0
▲ 1
▲ 0
▲ 0
Saves
0
0
0
0
Reviews
0
0
0
0
Prompts
0
2
0
0
Verified listing
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–
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Traffic figures are third-party estimates for the tool's own domain; tools sharing a domain with a bigger product are not counted. Pricing is captured from each tool's site and may lag.