Free AI research assistants55 AI tools for papers, citations, literature reviews and more
All the free AI research assistants in one list, each with a free plan on its own pricing page. All AI tools on RankDude, by type, start from the directory. The full list, free or paid, is on the AI research assistants page.
Updated 1 November 2026
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Ainvestainvest.comAI stock analysis app with market news and predictive tools.Listed in 1 list
Anaraanara.comSearches your library and the web, writes with cited claims.Listed in 1 list
AnswerThisanswerthis.ioSearches 250M papers and drafts cited literature reviews.Listed in 1 list
Arkangel AIarkangel.aiAnswers clinical questions with cited studies and guidelines, on the web or WhatsApp.Listed in 1 list
AskYourPDFaskyourpdf.comChat with PDFs, plus form filling and website chatbots.Listed in 2 lists
Avidnoteavidnote.comAI for researchers to write and read papers, chat with PDFs, analyse data and transcribe interviews.Listed in 1 list
Chat with PDFchatwithpdf.aiPlatform for literature reviews and systematic reviews with reference management and research agents.Listed in 1 list
ChatGPT Imageschatgpt.comOpenAI's image generation inside ChatGPT, successor to DALL-E, also offered via API.Listed in 23 lists
- AI image generator
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- AI PDF reader
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ChatPDFchatpdf.comChat with PDF files to summarise them and answer questions.Listed in 3 lists
Colandrcolandrcommunity.comScreens and sorts studies for reviews using machine learning.Listed in 1 list
DimeADozen.aidimeadozen.aiProduces research-backed business idea validation reports with sourced data and competitors.Listed in 1 list
Docalysisdocalysis.comAnswers questions about uploaded PDFs, such as listing risk factors or summarising legal issues.Listed in 1 list
Easemateeasemate.aiEaseMate AI is your all-in-one platform for image and video creation, AI work, workflow automation, and intelligent…
Elicitelicit.comAI research assistant that searches papers and extracts data into tables, for researchers.Listed in 2 lists
EvidenceMDevidencemd.aiAI that answers clinical questions with citations from 40M+ papers and guidelines.Listed in 1 list
Explainpaperexplainpaper.comHelps you read and understand research papers faster with AI explanations.Listed in 1 list
Humatahumata.aiAI agent that turns your documents into a knowledge base you can ask questions.Listed in 2 lists
Idealab.aiidealab.aiFree database of business ideas to find one that fits your experience.Listed in 1 list
Incitefulinciteful.xyzUses citation graph analysis to find the most relevant academic literature.Listed in 1 list
Ithyithy.comCombines AI perspectives with web sources in fast or deep research answers.Listed in 1 list
Jennijenni.aiAI research and academic writing assistant for students and researchers.
Kavoutkavout.comAI agents and stock picker that analyse thousands of stocks, ETFs and crypto assets.Listed in 2 lists
Keeniouskeenious.comHelps students and researchers find and understand academic papers across about 174M publications.Listed in 1 list
KOMO Searchkomo.aiAI search that looks across the web and answers with sources.Listed in 2 lists
Linerliner.comSearches with sources, researches papers and writes in one workspace.Listed in 1 list
Litmapslitmaps.comLitmaps accelerates your entire literature review.Listed in 1 list
Mendeleymendeley.comManages research papers and generates citations for academic writing.Listed in 2 lists
Moaramoara.ioWorkspace for systematic and narrative literature reviews.Listed in 1 list
OpenAIopenai.comOpenAI's coding agent that runs in the terminal, the IDE or the cloud and opens pull requests on its own.
OpenReadopenread.academyAnalyzes over 300 million papers with AI for research.Listed in 1 list
Otiootio.aiKeeps PDFs, videos and pages in one library and chats across them with citations.Listed in 1 list
Paper Digestpaperdigest.orgResearch platform to browse, search, read and review papers with AI.Listed in 1 list
Paperguidepaperguide.aiAI-native platform for literature reviews and auditable systematic reviews, with reference management and research…Listed in 3 lists
Petalpetal.orgChat with your documents using an AI analysis platform.Listed in 1 list
Preuve AIpreuve.aiTests a business idea with market data from over 60 live sources.Listed in 1 list
PrometAIprometai.appGenerates detailed business plans with AI and gives founders insights and tools.Listed in 1 list
Rayyanrayyan.aiAutomates screening and deduplication for systematic reviews.Listed in 1 list
Recallrecall.itAI knowledge base that summarises videos, podcasts, PDFs and articles and lets you chat.Listed in 1 list
Recallgetrecall.aiSummarizes videos, podcasts, PDFs and articles into a knowledge base.Listed in 2 lists
ResearchPalresearchpal.coFinds papers, writes cited literature reviews and analyses PDFs.Listed in 1 list
ResearchRabbitresearchrabbit.aiAI tool for literature discovery and review, for researchers.Listed in 2 lists
Science OSscienceos.aiAI science chat, multi-PDF chat and reference manager in one app.Listed in 1 list
Screenerscreener.inStock research site with Screener AI answering questions from company filings and earnings calls.Listed in 1 list
Semantic Scholarsemanticscholar.orgSemantic Scholar uses groundbreaking AI and engineering to understand the semantics of scientific literature to help…Listed in 1 list
SMMRYsmmry.comAI text summariser that extracts key points from articles, documents and reports.Listed in 2 lists
Stockinsightsstockinsights.aiAnswers questions on company filings and earnings transcripts, with AI summaries of transcripts and 8-K filings.Listed in 1 list
Summarize.ingsummarize.ingSummarizes YouTube videos with highlights, mind maps and segmented summaries.Listed in 1 list
48 of 56 tools
Other free AI tools for research
Still looking? Browse 69 free AI tools for research across 4 lists: research assistants, PDF readers tools, citation generators and more.
- Free AI PDF readers toolsTools that read PDFs: ask questions about a document, summarise it, pull out figures and tables and cite the page.8 tools
- Free AI citation generatorsTools that make citations: turn a link, DOI or title into APA, MLA or Chicago format and build a reference list.7 tools
- Free AI market research toolsTools that research a market: size it, profile competitors, find customer trends and summarise survey answers.5 tools
AI statistics, live monitors and how I test
- AI statisticsVisits, searches and demand for every category, monthly to October 2026.
- Live monitorsUptime, page speed, security and prices of the tested tools, checked every day.
- CheckersThe tools used during every review, explained one by one.
- Data sourcesWhere the monthly statistics come from and how they are read.
- How I testOne written procedure per category, the same scoring for every tool in it.
- Submit your AI toolNot on the list, or ready to be tested? Send it in for the next pull.
Free AI research assistants: questions people ask
What is a free AI research assistant?
Assistants that search the research literature, read papers and pull out what they say: find the studies on a question, summarise them with citations, map how papers cite each other and draft a literature review. On this page every tool also has a plan that costs nothing for as long as you like, read from its own pricing page.
How many AI research assistants have a free plan?
55 of the 131 AI research assistants RankDude lists, as of 1 November 2026. The full list, free or paid, is on the AI research assistants page.
What does the free plan usually limit?
Credits, outputs or projects per month, a watermark, lower resolution or fewer seats. The limits differ by tool; the pricing page each status was read from says exactly what the free plan includes.
Is this a ranking of free AI research assistants?
No. The list follows the site's one order: tools I have tested first, then the rest by how well known they are. Only a tested tool carries a grade.
Written by Miles Foster, Owner and tester, RankDude.
All free AI tools for research