55 Free AI Tools to Research Scientific Papers

The best free AI tools to research scientific papers, ranked by our checks. Last checked 18 Oct 2026.

Ranked AI tools you can use to research scientific papers. Each listing shows verified free-tier details from the vendor pricing page; picks require at least one month of free access (free plan, monthly credits, or a trial of 30+ days).

55 free tools

Each with its last-checked date

Jenni AI
AI academic writing assistant with citations.
Free forever, Limited daily AI words
AI Writing
AI Writing
Free accountTry
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Humata
AI for chatting with files and research.
Free forever, Limited pages
AI Research
AI Research
Free accountTry
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PDF.ai
Chat with PDF documents.
Free forever, Limited PDFs
AI Research
AI Research
Free accountTry
Compare
Logically (formerly Afforai)
AI research assistant and reference manager.
Free forever
AI Research
AI Research
Free accountTry
Compare
R Discovery
Personalized research paper feed and reader.
Free forever, Free $0
AI Research
AI Research
Try
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Explainpaper
Highlight confusing text in papers and get explanations.
Free forever
AI Research
AI Research
Free accountTry
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Anara
AI research assistant for papers and notes.
Free forever, Limited uploads
AI Research
AI Research
Free accountTry
Compare
QuillBot
Paraphrasing, summarizing, grammar, and citation tools for writers.
Free forever, Paraphrase up to 100 words, 2 modes
AI Writing
AI Writing
Free accountTry
Compare
Consensus
Search engine surfacing yes/no answers from scientific papers.
Free forever, 10 Pro messages and 3 deep reviews/month
AI Research
AI Research
Free accountTry
Compare
Liner
AI research assistant with cited sources.
Free forever, Limited daily searches
AI Research
AI Research
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Keenious
Find relevant research papers from your own writing.
Free forever
AI Research
AI Research
Free accountTry
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ChatPDF
Chat with any PDF.
Free forever, Limited PDFs and questions per day
AI Research
AI Research
No signupTry
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AskYourPDF
Chat with PDFs and research papers.
Free forever, Limited documents
AI Research
AI Research
Free accountTry
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Paperguide
AI research assistant for finding and summarizing papers.
Free forever, 2,000 AI credits per month
AI Research
AI Research
Free accountTry
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SparkToro
Audience research tool.
Free forever, Basic audience research at $0/mo
AI Marketing
AI Marketing
Try
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Parallel
Web search and research APIs for agents.
Free forever, Up to 5,000 API requests/month
Dev Infrastructure & AI APIs
Dev Infrastructure & AI APIs
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Mendeley
Free reference manager by Elsevier.
Free forever, Free reference manager, 2GB storage
AI Research
AI Research
Try
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Perplexity
Answer engine with live web citations and follow-up research threads.
Free forever, Pro adds more advanced searches and models
Chatbots & LLMs
Chatbots & LLMs
Free accountTry
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HyperWrite
Chrome assistant for autocomplete, email replies, and research.
Free forever, Free account: limited monthly credits on the basic AI
AI Writing
AI Writing
Free accountTry
Compare
Elicit
Research assistant finding papers and extracting answers from PDFs.
Free forever, Basic (free): limited Research Agent and reports, unlimited paper search
AI Research
AI Research
Free accountTry
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Semantic Scholar
Free AI-powered academic search with citation graphs and alerts.
Free forever, Free AI-driven research search
AI Research
AI Research
Free accountTry
Compare
Research Rabbit
Visual literature discovery and collections synced with Zotero.
Free forever, Free to sign up and use
AI Research
AI Research
Free accountTry
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Connected Papers
Graph similar academic papers from a seed publication.
Free forever, Free USD0: 5 graphs/month
AI Research
AI Research
Free accountTry
Compare
Litmaps
Citation maps and alerts to track emerging research fields.
Free forever, Up to 20 inputs, 2 Litmaps, 100 articles per map
AI Research
AI Research
Free accountTry
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Undermind
Deep literature search agent for biomedical and technical domains.
Free forever, Free $0 for exploratory research
AI Research
AI Research
Free accountTry
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Inciteful
Citation-network explorer that helps you discover the most relevant academic literature; free and built on open data.
Free forever, Free citation network tool
AI Research
AI Research
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Avidnote
AI research writing and note-taking.
Free forever
AI Research
AI Research
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Quizlet
Flashcards and AI study tools.
Free forever, Sign up for free; free for teachers
AI Research
AI Research
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Knowt
Free Quizlet alternative with AI notes and flashcards.
Free forever, AI flashcards and notes
AI Research
AI Research
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Photomath
Scan math problems for step-by-step solutions.
Free forever, Step-by-step math solutions
AI Research
AI Research
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Khanmigo
Khan Academy's AI tutor and teaching assistant.
Free forever, Free for teachers
AI Research
AI Research
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Compare
Turbo AI (formerly TurboLearn)
Turn lectures, PDFs and videos into notes, flashcards and quizzes (rebranded from TurboLearn).
Free forever, Note generation, flashcards and quizzes
AI Research
AI Research
Try
Compare
Quizgecko
AI quiz and flashcard generator.
Free forever
AI Research
AI Research
Try
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Ubersuggest
Keyword research and SEO tool with AI writer.
Free forever, Limited daily searches
AI Marketing
AI Marketing
Free accountTry
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KeywordTool.io
Keyword research from Google autocomplete.
Free forever, Free keyword suggestions
AI Marketing
AI Marketing
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Compare
Flowith
Agentic canvas workspace for research and creation.
Free forever, Free credits
AI Agents & Automation
AI Agents & Automation
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NoteGPT
AI summarizer for YouTube, PDFs and articles.
Free forever
AI Research
AI Research
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Glarity
AI summaries for YouTube and web pages.
Free forever
AI Research
AI Research
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OpenAlex
Free open catalog of scholarly works with API.
Free forever
AI Research
AI Research
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Open Knowledge Maps
Free visual search tool for research topics.
Free forever
AI Research
AI Research
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Paper Digest
AI-powered research paper summaries and search.
Free forever, Free daily digests
AI Research
AI Research
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Moonlight
AI research paper reader.
Free forever
AI Research
AI Research
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Zotero
Free open-source reference manager.
Free forever
AI Research
AI Research
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Petal
AI document analysis for research.
Free forever, Free to use; paid plans available
AI Research
AI Research
Try
Compare
Brisk Teaching
Free AI tools for teachers in Chrome.
Free forever, Free for teachers
AI Research
AI Research
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Compare
MagicSchool
AI platform for teachers and students.
Free forever, Free for teachers
AI Research
AI Research
Try
Compare
Diffit
AI leveled reading materials for teachers.
Free forever
AI Research
AI Research
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Compare
Eduaide
AI teaching assistant.
Free forever
AI Research
AI Research
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Compare
SchoolAI
AI learning spaces for classrooms.
Free forever, Free tier (labelled 'Free Trial'): 5 Space launches per year, PowerUps, tools and assistants
AI Research
AI Research
Try
Compare
Duolingo
Free language learning app with AI features.
Free forever, Free with ads; Super optional
AI Research
AI Research
Try
Compare
Mathway
Math problem solver with free basic answers.
Free forever
AI Research
AI Research
Try
Compare
Desmos
Free graphing calculator.
Free forever, Free graphing calculator and math tools
AI Research
AI Research
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Compare
Anki
Free open-source spaced repetition flashcards.
Free forever, Open-source desktop app and AnkiWeb sync
AI Research
AI Research
Try
Compare
RemNote
Notes and flashcards with AI.
Free forever
AI Research
AI Research
Try
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Coconote
AI note taker for lectures.
Free forever, Free to use with limits; Unlimited Pass optional
AI Research
AI Research
Try
Compare

Jenni AI

Humata

PDF.ai

Logically (formerly Afforai)

R Discovery

Explainpaper

Anara

QuillBot

Consensus

Liner

Keenious

ChatPDF

AskYourPDF

Paperguide

SparkToro

Parallel

Mendeley

Perplexity

HyperWrite

Elicit

Semantic Scholar

Research Rabbit

Connected Papers

Litmaps

Undermind

Inciteful

Avidnote

Quizlet

Knowt

Photomath

Khanmigo

Turbo AI (formerly TurboLearn)

Quizgecko

Ubersuggest

KeywordTool.io

Flowith

NoteGPT

Glarity

OpenAlex

Open Knowledge Maps

Paper Digest

Moonlight

Zotero

Petal

Brisk Teaching

MagicSchool

Diffit

Eduaide

SchoolAI

Duolingo

Mathway

Desmos

Anki

RemNote

Coconote

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