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Best AI PDF Assistants in 2026

When you want help working through PDFs, document limits and ways to use the answers are key comparison points. Anara, AskYourPDF, and Audeus are among the options. Check maximum file size and maximum PDF pages against the documents you use, and see whether scanned PDFs and multiple PDFs in one chat are supported. Source citations can help you trace answers back to a document; export formats and access platforms matter for carrying results into your workflow. Free-plan availability and the paid-from price round out the listed criteria, so you can compare practical fit as well as cost.

27 apps
Research read 23 Sept 2026
How the order is worked out

1

Anara

Free plan ExtensioniPhoneMac+1

Anara combines academic search, source-linked answers, and scientific writing tools.

7.7 Free plan · paid from $10/user/mo (annual) Visit site
2

AI PDF Reader

Free plan iPhoneMacWindows

AI PDF Reader combines question answering with page-level citations and a broad set of reading and annotation tools.

7.6 Free plan · paid from $0.99/mo Visit site
3

AskYourPDF

Free plan AndroidAPIExtension+2

AskYourPDF combines document chat, website agents, PDF form completion and API functions. The Free plan has defined daily and upload limits; Premium lists higher limits and is billed yearly.

7.6 Free plan · paid from $11.99/mo (annual) Visit site
4

Audeus

Free plan AndroidExtensioniPhone+1

Audeus combines text-to-speech with scanning and document annotation across web and mobile platforms. Review the free-plan limits and trial terms, including automatic plan start, before choosing Pro.

7.6 Free plan · paid from $9.92/mo (annual) · 3-day trial Visit site
5

ChatPDF

Free plan AndroidAPIExtension+5

ChatPDF combines document summaries, questions, citations, and file sharing, with support for several document formats and languages.

7.5 Free plan Visit site
6

ChatDOC

Free plan APIWeb

ChatDOC combines document conversations with citations and multi-file queries, and it offers APIs for integration.

7.3 Free plan · paid from $8.99/mo Visit site
7

DeinPDF

Free plan AndroidiPhoneWeb

DeinPDF brings document chat, citations, summaries, and translation together, with usage-based billing rather than a forced subscription.

7.3 From €10 Visit site
8

Paperpal
by Paperpal
Free plan ExtensionMacWeb+1

Paperpal brings research discovery, academic writing support, and submission checks into one workspace.

7.3 Free plan · paid from $12/user/mo (annual) Visit site
9

DeepPDF

Free plan ExtensionWeb

DeepPDF brings document Q&A, OCR, translation, academic search and PDF utilities together in a browser service.

7.2 Free plan Visit site
10

Chonvy

Free plan Web

Chonvy combines document navigation with answers linked back to PDF content. Its free access has file-format and size limits, and the service notes that usage limits may change as it grows.

7.1 Free plan Visit site
11

docAnalyzer

Free plan APIWeb

docAnalyzer brings document chat, source-linked answers, OCR, and batch workflows into one workspace.

7.1 Free plan · paid from $8/mo Visit site
12

Humata

Free plan APIWeb

Choose Humata if you want document answers with citations, or need to summarize and compare files.

7.0 Free plan Visit site
13

Doxy

Free plan Web

Doxy combines cited document answers with project organization and broad file support. Check the plan limits and web-page access restrictions against the material you need to use.

6.9 Free plan · paid from $4.99/mo Visit site
14

Explainpaper

Free plan Web

Choose Explainpaper if you want an AI reader that explains passages in context and lets you ask questions about a paper.

6.9 Free plan · paid from $16/user/mo · 7-day trial Visit site
15

PaperDraft

Free plan Web

Choose PaperDraft if you want academic drafting, document questions and citation tools in one web workspace.

6.9 Free plan · paid from £150/yr Visit site
16

PDF.chat

Free plan APIWeb

Choose PDF.chat if page-cited answers, scanned document OCR, or side-by-side AI model comparisons are useful to your document work.

6.9 Free plan · paid from $5/mo Visit site
17

PDF.ai API

Free plan API

PDF.ai API combines PDF parsing, structured extraction, section finding, and Q&A in one HTTP API. Review the operation-specific credit charges and key handling before building it into a workflow.

6.8 Free plan · paid from $49/mo Visit site
18

pdfAssistant.ai

Free plan Web

Choose pdfAssistant.ai if you want to create reusable workflows from natural-language instructions, process PDF batches, or use AI Studio for document tasks.

6.8 Free plan · paid from $9.99/mo Visit site
19

PDF-GPT

Free plan APILinuxSelf-hosted+1

PDF-GPT provides a documented open-source route to PDF chat with semantic retrieval and page references.

6.8 Open source Visit site
20

PDFCite

Free plan Extension

PDFCite brings document questions, citation tools and paper-network exploration into a browser extension.

6.7 Free plan Visit site
21

PDFtoChat

Free plan Self-hostedWeb

Choose PDFtoChat if you want to ask questions about uploaded PDFs and value a free account or access to the source code.

6.7 Free plan Visit site
22

Regeste

Free plan Self-hostedWeb

Regeste offers citation-linked document answers with several ways to handle answering and data. Check browser storage availability and the daily cloud allowance against your intended use.

6.7 Free plan Visit site
23

PDFpal

Free plan APISelf-hostedWeb

PDFpal combines local document control with project-based research chat and scripting.

6.6 Visit site
24

ResearchPal AI Paraphraser

Free plan Web

ResearchPal combines AI writing assistance with academic search, PDF analysis, and citation tools. Its free tier is limited, and users should independently verify generated summaries and citations.

6.5 Free plan · paid from $8.25/mo (annual) Visit site
25

Rorobot

Free plan Web

Rorobot brings document reading, questions, flashcards, and quizzes together in a searchable hub. Its free plan and arXiv search may suit readers looking for a web-based study tool.

6.5 Free plan Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

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