The best free research & learning tools (100)

All 100 research & learning tools in the catalog across 11 sub-categories, ordered free tiers first.

100tools listed
94free or freemium
40with no paid plan at all
11sub-categories covered

Best Free Research & Learning Tools — straight answers

What are the best free research & learning tools?

Flocci AI Tools lists 100 of them, ordered free tiers first: Ai2 Paper Finder (Asta), Aila (Oak National Academy), AlphaFold Server, alphaXiv and Biomni. 94 of the 100 are free or have a free tier. Each entry states what it uniquely does rather than a score.

Which of these are completely free?

40 on this page are marked fully free with no paid plan at all: Ai2 Paper Finder (Asta), Aila (Oak National Academy), AlphaFold Server, alphaXiv and Biomni. The remaining 60 are freemium, trial or paid, and each is labelled with its exact tier so nothing surprises you at sign-up.

How is this list ordered?

Free tools first, then freemium, then trial, then paid, and alphabetically inside each tier. Nobody pays to appear higher: Flocci AI Tools carries no ads, no sponsored slots and no paid listings, so the order reflects price and nothing else.

Best Free Research & Learning Tools — quick picks

Which Research & Learning Tools work in a browser with no install?

Ai2 Paper Finder (Asta), Aila (Oak National Academy), AlphaFold Server, alphaXiv and Biomni all work in a browser tab with no install needed — just open the site and go. 73 of the 94 free Research & Learning Tools listed here are browser-based.

Which Research & Learning Tools let you sign in with Google?

alphaXiv, Metaso AI Search (Mita), AskYourPDF, ChatPDF and Curipod support Google sign-in, so you can start without creating a new account. That's 11 of the 94 free Research & Learning Tools on this page.

Which Research & Learning Tools have a mobile app?

Google LearnLM, Metaso AI Search (Mita), Phia, Amazon Rufus and Baidu AI Search have an iOS or Android app. 30 of the 94 free Research & Learning Tools here can run on your phone.

Which Research & Learning Tools can you self-host or run offline?

AI Scientist-v2, Boltz, DeepSeek-OCR, Docling and Dolphin (ByteDance) can be self-hosted or run locally without a browser — useful for privacy, air-gapped networks, or avoiding API rate limits. 12 of the 94 free Research & Learning Tools here run offline.

All 100 tools, free tiers first

Best Free Research & Learning Tools: pricing tier, category and the capability each tool is listed for.
ToolPricingTypeListed for
Ai2 Paper Finder (Asta)FreeAcademic ResearchAgentic literature-search tool built by Ai2, now folded into the broader 'Asta' research-agent platform
Aila (Oak National Academy)FreeAI for Teachers & ClassroomsGenerates lesson plans, slides, quizzes and worksheets
AlphaFold ServerFreeScience & Research AIFree browser-based access to AlphaFold 3-class structure prediction for non-commercial research
alphaXivFreeAcademic ResearchFree overlay for arXiv papers with public discussion/comment threads per paper
BiomniFreeScience & Research AIGeneral-purpose biomedical agent combining LLM planning with code execution
DaydreamFreeAI Shopping AssistantsProprietary fashion-trained AI understands cut/color/occasion, not generic product search
dots.ocr (dots.mocr)FreeAI OCR & Document Extraction3B vision-language model for layout parsing across many scripts
Google LearnLMFreeAI Tutors & LearningLearning-tuned tutoring in Gemini
LangExtract (Google)FreeAI OCR & Document ExtractionPython library extracting structured data from unstructured text with LLMs
Little Language LessonsFreeLanguage Learning AITiny Lesson: situational vocabulary and grammar on demand
Metaso AI Search (Mita)FreeAI Search & Answer EnginesAd-free AI search with direct answers
MinerUFreeAI OCR & Document ExtractionParses PDFs, images and Office files into Markdown, JSON, HTML or LaTeX
MiroThinkerFreeDeep Research & DocumentsDeep research agent with up to 300 tool calls per task and 256K context
MorphicFreeAI Search & Answer EnginesOpen-source, Apache 2.0, self-hostable generative-UI search engine
olmOCRFreeAI OCR & Document ExtractionApache 2.0 open-source OCR toolkit from Ai2, 19.3k GitHub stars
PaddleOCR-VLFreeAI OCR & Document Extraction1B-parameter document parsing VLM (NaViT encoder + ERNIE-4.5-0.3B)
PhiaFreeAI Shopping AssistantsChrome extension + iOS app that surfaces resale/secondhand alternatives while shopping
ResearchRabbitFreeAcademic ResearchVisual citation-network mapping across 310M+ papers
SciraFreeAI Search & Answer EnginesFree, no credit card required
Semantic ScholarFreeAcademic ResearchFully free AI-powered search across 237M+ scientific papers
STORM (Stanford)FreeDeep Research & DocumentsMIT-licensed open-source system that researches a topic and writes a full cited report
Tongyi DeepResearchFreeDeep Research & Documents30.5B-parameter MoE agent (3.3B active) with 128K context for long-horizon research
WonderplanFreeTravel PlanningDay-by-day itineraries from destination, budget and interests
AI Scientist-v2FreeScience & Research AIAgentic tree search proposes ideas, runs experiments and writes papers
Amazon RufusFreeAI Shopping AssistantsAmazon's AI shopping assistant, now branded Alexa for Shopping (formerly Rufus)
Baidu AI SearchFreeAI Search & Answer EnginesAd-free AI answers built on Baidu Search, Wenku, Health and Law content
BoltzFreeScience & Research AIFirst fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed
DeepSeek-OCRFreeAI OCR & Document ExtractionVision-language OCR that compresses document context optically
DoclingFreeAI OCR & Document ExtractionMIT-licensed, 64.7k GitHub stars, IBM Research-originated, now under LF AI & Data Foundation
Dolphin (ByteDance)FreeAI OCR & Document ExtractionTwo-stage document-type and layout analysis then element parsing
Evo 2FreeScience & Research AIDNA language model at single-nucleotide resolution with 1M base-pair context
GPT ResearcherFreeDeep Research & DocumentsPlanner and executor agents gather from 20+ web sources
GuideGeekFreeTravel Planning1M+ consumer users per vendor, live since April 2023 (longer track record than most AI trip tools)
ima.copilot (Tencent ima)FreeDeep Research & DocumentsAI workbench that searches, reads and writes from a personal knowledge base
MarkerFreeAI OCR & Document ExtractionApache-2.0 code, 38.7k GitHub stars, converts PDFs/DOCX/PPTX/XLSX to markdown/JSON
MarkItDownFreeAI OCR & Document ExtractionConverts PDF, Office files, images, audio and HTML into LLM-friendly Markdown
Nano AI Search (360)FreeAI Search & Answer EnginesCalls 16+ Chinese large models (Doubao, Ernie, Qwen, MiniMax) in one search
Open NotebookFreeDeep Research & DocumentsSelf-hosted NotebookLM alternative over PDFs, video, audio and web pages
PaperQA2FreeAcademic ResearchRAG over PDFs with in-text citations grounded in passages
PerplexicaFreeAI Search & Answer EnginesMIT-licensed, fully self-hostable open-source Perplexity clone
AnaraFreemiumAcademic ResearchCited answers linked to exact passages in papers and uploaded files
AskYourPDFFreemiumAI OCR & Document ExtractionChat with any PDF plus auto-fill PDF forms
Brisk TeachingFreemiumAI for Teachers & ClassroomsWorks inside Google Docs/Slides/Classroom and Microsoft Word/PowerPoint via extension
Chai-1 (Chai Discovery)FreemiumScience & Research AIChai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model
Chandra OCRFreemiumAI OCR & Document ExtractionConverts images and PDFs to HTML, Markdown or JSON with layout
ChatGPT Deep ResearchFreemiumDeep Research & DocumentsRuns up to ~30 min for exhaustive reports
ChatGPT SearchFreemiumAI Search & Answer EnginesReal-time web answers inside ChatGPT
ChatGPT Study ModeFreemiumAI Tutors & LearningSocratic step-by-step tutoring mode built into ChatGPT rather than direct answers
ChatPDFFreemiumDeep Research & DocumentsChat with any PDF or document
Connected PapersFreemiumAcademic ResearchVisual graph of related papers built from co-citation analysis
ConsensusFreemiumAcademic ResearchAnswers grounded in peer-reviewed papers
CuripodFreemiumAI for Teachers & ClassroomsGenerates teacher-led interactive lessons aligned to 55+ curricula
ElicitFreemiumAcademic ResearchFind and summarize research papers
Emergent MindFreemiumAcademic ResearchSurfaces trending arXiv papers with video/whiteboard-style explainers
ExaFreemiumAI Search & Answer EnginesSearch API built specifically for AI agents/LLMs, not humans
FeloFreemiumAI Search & Answer EnginesFree multilingual AI search & creation platform
FlintFreemiumAI for Teachers & ClassroomsTeacher-configured AI tutors and feedback tools for students
Gemini Deep ResearchFreemiumDeep Research & DocumentsMulti-step research across the web
GlaspFreemiumYouTube & Content Summarizers2M+ users per vendor; free web/PDF/Kindle highlighter with a social discovery layer of other users' highlights
Grok DeeperSearchFreemiumAI Search & Answer EnginesLive search across X and the open web
HumataFreemiumAI OCR & Document ExtractionFree tier: 60 pages, 10 answers, no card
iAsk.aiFreemiumAI Search & Answer EnginesFree AI answer engine aimed at students/researchers
KnowtFreemiumAI Tutors & LearningPositions as the free Quizlet alternative, with unlimited learn mode/practice tests free
KomoFreemiumAI Search & Answer EnginesFast, ad-free AI search
LitmapsFreemiumAcademic ResearchNetwork-map visualization of citations across a research topic
LlamaParseFreemiumAI OCR & Document ExtractionParses 90+ formats incl. complex tables/charts/handwriting into clean markdown
MagicSchool AIFreemiumAI for Teachers & Classrooms80+ free AI tools for teachers: lesson planners, rubric generators, writing feedback
MathpixFreemiumAI OCR & Document ExtractionSpecializes in STEM: equations, chemistry structures, handwriting to LaTeX/text
MindtripFreemiumTravel PlanningConversational itinerary building with live maps/booking links in one thread
NotebookLMFreemiumDeep Research & DocumentsGrounded answers from your own sources
NoteGPTFreemiumYouTube & Content Summarizers400,000 active Chrome Web Store users as of Jul 2026, ~12,683 ratings at 4.0/5
PaperpalFreemiumAcademic ResearchAI rewriting, translation and citation finding for manuscripts
ParallelFreemiumAI Search & Answer EnginesRecurring monthly free allowance of several thousand requests
PDF.aiFreemiumAI OCR & Document ExtractionChat-with-PDF product plus a separate parse/extract/split PDF API
PerplexityFreemiumAI Search & Answer EnginesCited, real-time answers (1B+ queries/quarter)
PraktikaFreemiumLanguage Learning AIFree tier with basic AI-avatar conversation practice, low-cost premium
QuizletFreemiumAI Tutors & LearningAI flashcards and practice tests from notes
RecallFreemiumYouTube & Content SummarizersSummarizes YouTube videos, articles and PDFs into a linked knowledge graph
ReductoFreemiumAI OCR & Document Extraction15,000 free starter credits, no card required
ScholarcyFreemiumAcademic ResearchAuto-generates 'summary flashcards' from papers/reports in seconds
SchoolAIFreemiumAI for Teachers & Classrooms'Spaces' let teachers design their own AI learning experiences for students
SciSpaceFreemiumAcademic ResearchExplain and chat with any paper
Surya OCRFreemiumAI OCR & Document Extraction650M-parameter OCR VLM covering 90+ languages
SymbolabFreemiumAI Tutors & LearningStep-by-step explanations across algebra, calculus, trig, geometry, physics
TalkPalFreemiumLanguage Learning AISupports 130+ languages for conversational AI practice
TavilyFreemiumAI Search & Answer Engines1,000 free API credits/month, no card required
Turbo AI (formerly Turbolearn)FreemiumAI Tutors & LearningConverts uploaded PDFs/videos/recordings into notes, flashcards, quizzes, and podcasts
TweeFreemiumAI for Teachers & ClassroomsGenerates CEFR-aligned (A1-C2) texts, dialogues, and exercises across 10 languages
UndermindFreemiumAcademic ResearchExhaustive, agentic literature search
Upstage Document AIFreemiumAI OCR & Document ExtractionParse/Extract/Classify/Instruct pipeline billed per page
ELSA SpeakFreemiumLanguage Learning AIFree plan includes AI role-play conversations and real-time pronunciation feedback
KhanmigoFreemiumAI Tutors & LearningSocratic AI tutor from Khan Academy
Mistral OCR 4FreemiumAI OCR & Document ExtractionSelf-hostable single-container OCR model for regulated industries
PhotomathFreemiumAI Tutors & LearningFree Basic plan with full step-by-step explanations and visual aids
Kagi AssistantTrialAI Search & Answer EnginesBundled with Kagi's paid ad-free search subscription
SciteTrialAcademic Research'Smart Citations' show whether a paper is supported, contrasted, or just mentioned by later work
EightifyTrialYouTube & Content SummarizersSummarizes YouTube videos up to 10 hours long in ~5 seconds
Kosmos (Edison Scientific / FutureHouse)Science & Research AIAutonomous AI agent that runs literature review + data analysis cycles, condensing ~6 months of research into a day per vendor
AlphaSenseDeep Research & DocumentsAI search across SEC filings, earnings transcripts, broker research, private data
Duolingo MaxAI Tutors & LearningAI roleplay and 'Explain My Answer'

Ai2 Paper Finder (Asta)

Academic Research
free
  • Agentic literature-search tool built by Ai2, now folded into the broader 'Asta' research-agent platform
  • Free to use, iteratively expands/narrows search based on natural-language queries
  • Built on Semantic Scholar's corpus

Aila (Oak National Academy)

AI for Teachers & Classrooms
freeNew
  • Generates lesson plans, slides, quizzes and worksheets
  • Aligned to England's national curriculum and exam boards
  • Draws on Oak's library of teacher-made content
  • Free for UK teachers; non-UK users get a demo account with three lesson plans

AlphaFold Server

Science & Research AI
free
  • Free browser-based access to AlphaFold 3-class structure prediction for non-commercial research
  • Predicts structure/interactions of proteins, DNA, RNA, ligands in one model
  • Backed by the AlphaFold Protein Structure Database of 200M+ predicted structures

alphaXiv

Academic Research
free
  • Free overlay for arXiv papers with public discussion/comment threads per paper
  • Personalized research feed and researcher-follow system
  • Browser extension and MCP server for agent integration

Biomni

Science & Research AI
freeNew
  • General-purpose biomedical agent combining LLM planning with code execution
  • Integrates 150+ bioinformatics tools and 59 databases
  • Web interface so biologists can use it without coding
  • Open-source from Stanford SNAP lab

Daydream

AI Shopping Assistants
free
  • Proprietary fashion-trained AI understands cut/color/occasion, not generic product search
  • Search across 10,000+ vetted brands and 2M+ items
  • First third-party app to integrate Apple Visual Intelligence for shopping (Nov 2025)

dots.ocr (dots.mocr)

AI OCR & Document Extraction
freeNew
  • 3B vision-language model for layout parsing across many scripts
  • Converts charts and diagrams into SVG code
  • Scores 83.9 on olmOCR-bench
  • MIT licensed with free live demo

Google LearnLM

AI Tutors & Learning
free
  • Learning-tuned tutoring in Gemini
  • Guided Learning and study modes
  • Step-by-step explanations & quizzes
  • Free with Gemini

LangExtract (Google)

AI OCR & Document Extraction
freeNew
  • Python library extracting structured data from unstructured text with LLMs
  • Maps each extraction to its exact source span
  • Works with Gemini, OpenAI and local Ollama models
  • Interactive HTML visualization of results

Little Language Lessons

Language Learning AI
freeNew
  • Tiny Lesson: situational vocabulary and grammar on demand
  • Slang Hang: realistic native-speaker conversations
  • Word Cam: photo an object to get its label in the target language
  • Around 15 languages in the browser

Metaso AI Search (Mita)

AI Search & Answer Engines
freeNew
  • Ad-free AI search with direct answers
  • Built-in slide presentation and video generation
  • File upload and API access
  • Free to use

MinerU

AI OCR & Document Extraction
freeNew
  • Parses PDFs, images and Office files into Markdown, JSON, HTML or LaTeX
  • Runs fully locally with OCR, table and formula recognition
  • Free hosted web app at mineru.net plus agent-ready outputs
  • Version 4.0 adds four parsing quality tiers

MiroThinker

Deep Research & Documents
freeNew
  • Deep research agent with up to 300 tool calls per task and 256K context
  • Scores 74.0 on BrowseComp and 75.3 on BrowseComp-ZH (v1.7)
  • Free online demo at dr.miromind.ai
  • Apache 2.0

Morphic

AI Search & Answer Engines
free
  • Open-source, Apache 2.0, self-hostable generative-UI search engine
  • 9k+ GitHub stars, actively maintained
  • Pluggable model (OpenAI/Anthropic/Gemini/Ollama) and search backends (Tavily/Brave/Exa)

olmOCR

AI OCR & Document Extraction
free
  • Apache 2.0 open-source OCR toolkit from Ai2, 19.3k GitHub stars
  • Vision-language-model based, handles equations/tables/multi-column layout
  • Runs at a fraction of commercial OCR cost on a 7B model

PaddleOCR-VL

AI OCR & Document Extraction
freeNew
  • 1B-parameter document parsing VLM (NaViT encoder + ERNIE-4.5-0.3B)
  • Handles text, tables, formulas, charts and handwriting
  • Supports 109 languages including Hindi and Arabic
  • Apache 2.0; newer PaddleOCR-VL-1.6 available

Phia

AI Shopping Assistants
free
  • Chrome extension + iOS app that surfaces resale/secondhand alternatives while shopping
  • 300K-500K+ downloads within its first year per multiple 2026 reports

ResearchRabbit

Academic Research
free
  • Visual citation-network mapping across 310M+ papers
  • Zotero integration for reference management
  • Used by 1M+ researchers at Harvard/Stanford/MIT/Oxford, free to sign up

Scira

AI Search & Answer Engines
free
  • Free, no credit card required
  • Open-source (git.new/scira)
  • Multi-mode search: web, Reddit, academic papers, video, fact-check

Semantic Scholar

Academic Research
free
  • Fully free AI-powered search across 237M+ scientific papers
  • Semantic Reader augmented-reading tool for papers
  • Free public API used by many other research tools

STORM (Stanford)

Deep Research & Documents
free
  • MIT-licensed open-source system that researches a topic and writes a full cited report
  • Perspective-guided simulated conversations to deepen research before writing
  • Co-STORM variant adds human-AI collaborative curation

Tongyi DeepResearch

Deep Research & Documents
freeNew
  • 30.5B-parameter MoE agent (3.3B active) with 128K context for long-horizon research
  • Free demos on Hugging Face Space and ModelScope
  • Also reachable through OpenRouter API
  • Apache 2.0; ReAct and IterResearch Heavy modes

Wonderplan

Travel Planning
freeNew
  • Day-by-day itineraries from destination, budget and interests
  • Accommodation suggestions and editable plans
  • Download itinerary as PDF for offline use
  • Free with account; vendor says free 'for now'

AI Scientist-v2

Science & Research AI
freeNew
  • Agentic tree search proposes ideas, runs experiments and writes papers
  • No human-authored templates needed
  • Open code from Sakana AI
  • Requires disclosure of AI use in resulting papers

Amazon Rufus

AI Shopping Assistants
free
  • Amazon's AI shopping assistant, now branded Alexa for Shopping (formerly Rufus)
  • Free for all Amazon customers in the Amazon app and website, no Prime membership required
  • Answers product questions and compares items using catalog data and reviews
  • Helps find gifts and recommendations conversationally

Baidu AI Search

AI Search & Answer Engines
freeNew
  • Ad-free AI answers built on Baidu Search, Wenku, Health and Law content
  • Powered by Baidu's ERNIE models
  • Available on Baidu app, desktop and mobile web
  • Free for all users per Baidu's free-chatbot policy

Boltz

Science & Research AI
free
  • First fully open-source model to approach AlphaFold3-level structure prediction, MIT-licensed
  • Boltz-2 adds binding-affinity prediction, not just structure
  • Hostable free via community web apps (e.g. Tamarind Bio) or run locally

DeepSeek-OCR

AI OCR & Document Extraction
freeNew
  • Vision-language OCR that compresses document context optically
  • Document-to-Markdown, layout detection and figure parsing
  • Multiple resolution modes up to 1280x1280
  • MIT license; DeepSeek-OCR2 released Jan 2026

Docling

AI OCR & Document Extraction
free
  • MIT-licensed, 64.7k GitHub stars, IBM Research-originated, now under LF AI & Data Foundation
  • Advanced PDF layout + table structure recognition, local execution
  • Exports to Markdown/HTML/JSON, integrates with LangChain/LlamaIndex

Dolphin (ByteDance)

AI OCR & Document Extraction
freeNew
  • Two-stage document-type and layout analysis then element parsing
  • Page-level and element-level parsing modes
  • Hugging Face Transformers integration
  • MIT licensed; Dolphin-v2 released Dec 2025

Evo 2

Science & Research AI
freeNew
  • DNA language model at single-nucleotide resolution with 1M base-pair context
  • Variant effect prediction, sequence completion and genome design
  • Free hosted 40B access via NVIDIA build.nvidia.com
  • Apache 2.0 code, weights and training data open; published in Nature

GPT Researcher

Deep Research & Documents
freeNew
  • Planner and executor agents gather from 20+ web sources
  • Produces cited reports exported as PDF, Word or Markdown
  • Also researches local PDFs, text and Excel files
  • Works with many LLM providers; Apache 2.0

GuideGeek

Travel Planning
free
  • 1M+ consumer users per vendor, live since April 2023 (longer track record than most AI trip tools)
  • Partners with 60-70 tourism boards to power destination-specific conversational AI
  • Built by travel publisher Matador Network, not a pure AI startup

ima.copilot (Tencent ima)

Deep Research & Documents
freeNew
  • AI workbench that searches, reads and writes from a personal knowledge base
  • Dual engine with Tencent Hunyuan and DeepSeek-R1
  • Shared knowledge bases; Windows, Android and mini-program apps
  • 2GB free cloud storage at launch

Marker

AI OCR & Document Extraction
free
  • Apache-2.0 code, 38.7k GitHub stars, converts PDFs/DOCX/PPTX/XLSX to markdown/JSON
  • 76.0% accuracy on the olmocr-bench benchmark
  • Runs on GPU, CPU, or Apple Silicon; optional LLM-boosted accuracy mode

MarkItDown

AI OCR & Document Extraction
freeNew
  • Converts PDF, Office files, images, audio and HTML into LLM-friendly Markdown
  • Ships an MCP server for agents
  • Open-source Python package and CLI
  • Optional LLM-based image description

Nano AI Search (360)

AI Search & Answer Engines
freeNew
  • Calls 16+ Chinese large models (Doubao, Ernie, Qwen, MiniMax) in one search
  • Multi-model debate and brainstorm modes
  • Text, voice, photo and video search
  • Generates web pages, videos, images and PPTs from queries

Open Notebook

Deep Research & Documents
freeNew
  • Self-hosted NotebookLM alternative over PDFs, video, audio and web pages
  • Works with 18+ AI providers including Ollama
  • Generates podcasts with 1 to 4 speakers
  • MIT licensed with REST API

PaperQA2

Academic Research
freeNew
  • RAG over PDFs with in-text citations grounded in passages
  • Agentic search that iteratively refines evidence
  • Integrates academic metadata for citation tracking
  • Apache 2.0; calendar-versioned release Dec 2025

Perplexica

AI Search & Answer Engines
free
  • MIT-licensed, fully self-hostable open-source Perplexity clone
  • Runs with local LLMs via Ollama or cloud providers
  • Uses SearxNG for private, ad-free web search

Anara

Academic Research
freemiumNew
  • Cited answers linked to exact passages in papers and uploaded files
  • Searches PubMed, arXiv and JSTOR; Zotero and Mendeley connectors
  • Permanent free tier with 20MB/120-page imports
  • Benchmarked 97% multi-document answer correctness (vendor claim)

AskYourPDF

AI OCR & Document Extraction
freemium
  • Chat with any PDF plus auto-fill PDF forms
  • Embeddable document chatbot for websites
  • 5M+ users including MIT/Harvard/Oxford/Stanford

Brisk Teaching

AI for Teachers & Classrooms
freemium
  • Works inside Google Docs/Slides/Classroom and Microsoft Word/PowerPoint via extension
  • Adjusts reading levels, translates content, gives personalized student feedback
  • 2M+ teachers, 20,000+ school districts, 93% Common Sense Privacy Rating

Chai-1 (Chai Discovery)

Science & Research AI
freemium
  • Chai-1 is free, Apache-2.0-licensed for academic and commercial use — a genuinely open structure-prediction model
  • Chai-2 (paid, enterprise) generates de novo antibodies directly from target epitopes, used by Lilly, Novartis, Pfizer

Chandra OCR

AI OCR & Document Extraction
freemiumNew
  • Converts images and PDFs to HTML, Markdown or JSON with layout
  • Handles tables, forms and handwriting in 90+ languages
  • 85.8% on olmOCR benchmark (Chandra 2, Mar 2026)
  • Free playground at datalab.to; open weights under modified OpenRAIL-M

ChatGPT Deep Research

Deep Research & Documents
freemium
  • Runs up to ~30 min for exhaustive reports
  • Browses hundreds of sources
  • Structured, cited long-form output
  • Limited runs on lower tiers

ChatGPT Search

AI Search & Answer Engines
freemium
  • Real-time web answers inside ChatGPT
  • Inline citations and follow-ups
  • Combines search with reasoning
  • Available on the free tier

ChatGPT Study Mode

AI Tutors & Learning
freemium
  • Socratic step-by-step tutoring mode built into ChatGPT rather than direct answers
  • Available to Free, Plus, and Pro ChatGPT users
  • Distinct product surface from the base ChatGPT entry already listed

ChatPDF

Deep Research & Documents
freemium
  • Chat with any PDF or document
  • Cited answers with page references
  • Summaries and key points
  • Free daily PDFs

Connected Papers

Academic Research
freemium
  • Visual graph of related papers built from co-citation analysis
  • Free graphs per month before requiring paid Academic/Pro plan
  • Prior-work and derivative-work graph views

Consensus

Academic Research
freemium
  • Answers grounded in peer-reviewed papers
  • Consensus Meter across studies
  • Study snapshots and quality
  • Free searches

Curipod

AI for Teachers & Classrooms
freemium
  • Generates teacher-led interactive lessons aligned to 55+ curricula
  • Real-time AI feedback on student writing during class discussion
  • Reports 23-point gains on state reading/writing tests, largest for lowest performers

Elicit

Academic Research
freemium
  • Find and summarize research papers
  • Extract data across studies
  • Systematic-review workflows
  • Free monthly credits

Emergent Mind

Academic Research
freemium
  • Surfaces trending arXiv papers with video/whiteboard-style explainers
  • Aggregates social-media discussion signal per paper
  • Free basic access with a separate paid pricing tier

Exa

AI Search & Answer Engines
freemium
  • Search API built specifically for AI agents/LLMs, not humans
  • Indexes 80B+ documents, sub-180ms answers
  • Structured JSON extraction across companies/code/docs

Felo

AI Search & Answer Engines
freemium
  • Free multilingual AI search & creation platform
  • Combines search with document/content creation tools
  • Strong traction in Japan/Asia markets

Flint

AI for Teachers & Classrooms
freemiumNew
  • Teacher-configured AI tutors and feedback tools for students
  • Free access for up to 80 users (teachers or students)
  • Paid tiers add SIS/LMS integration and analytics
  • K-12 focused

Gemini Deep Research

Deep Research & Documents
freemium
  • Multi-step research across the web
  • Editable research plans
  • Long, organized reports
  • Available with Gemini

Glasp

YouTube & Content Summarizers
freemium
  • 2M+ users per vendor; free web/PDF/Kindle highlighter with a social discovery layer of other users' highlights
  • AI YouTube-summary feature using ChatGPT/Claude alongside its core highlighting product
  • Cross-browser support (Chrome, Firefox, Edge, Safari, Brave, Opera)

Grok DeeperSearch

AI Search & Answer Engines
freemium
  • Live search across X and the open web
  • Best for breaking news and trends
  • Reasoned, sourced summaries
  • Free daily queries

Humata

AI OCR & Document Extraction
freemium
  • Free tier: 60 pages, 10 answers, no card
  • Cited answers across many uploaded files at once
  • Paid tiers priced per extra page rather than per seat

iAsk.ai

AI Search & Answer Engines
freemium
  • Free AI answer engine aimed at students/researchers
  • Cited, checkable sources with no data storage claim
  • Built-in AI video tutor and PDF/document analysis

Knowt

AI Tutors & Learning
freemium
  • Positions as the free Quizlet alternative, with unlimited learn mode/practice tests free
  • AI lecture notetaker transcribes and generates flashcards from recordings
  • 1M+ users, ~50% of AP test-takers used it in May 2025

Komo

AI Search & Answer Engines
freemium
  • Fast, ad-free AI search
  • Explore, chat and research modes
  • Privacy-oriented
  • Free to use

Litmaps

Academic Research
freemium
  • Network-map visualization of citations across a research topic
  • Automatic monitoring/alerts for new relevant papers
  • 350,000+ researchers across 150 countries

LlamaParse

AI OCR & Document Extraction
freemium
  • Parses 90+ formats incl. complex tables/charts/handwriting into clean markdown
  • 300,000+ users, 1B+ documents processed
  • Free trial credits via LlamaCloud, then usage-based

MagicSchool AI

AI for Teachers & Classrooms
freemium
  • 80+ free AI tools for teachers: lesson planners, rubric generators, writing feedback
  • FERPA/COPPA compliant, doesn't train on student/teacher data
  • Reports 7-10 hours/week saved per teacher across 20+ major school districts

Mathpix

AI OCR & Document Extraction
freemium
  • Specializes in STEM: equations, chemistry structures, handwriting to LaTeX/text
  • Desktop Snip app plus Convert/Files developer APIs
  • 50B+ pages processed, 5M+ users

Mindtrip

Travel Planning
freemium
  • Conversational itinerary building with live maps/booking links in one thread
  • ~350K monthly US visitors in its first 5-6 months per Ahrefs traffic data
  • Named to Fast Company's Most Innovative Companies list

NotebookLM

Deep Research & Documents
freemium
  • Grounded answers from your own sources
  • Audio Overviews (podcast-style)
  • Mind maps and study guides
  • Free tier available

NoteGPT

YouTube & Content Summarizers
freemium
  • 400,000 active Chrome Web Store users as of Jul 2026, ~12,683 ratings at 4.0/5
  • Batch-summarizes up to 20 videos at once, works even on videos without captions
  • Bundles summaries with flashcards, mind maps and slide generation, not just text output

Paperpal

Academic Research
freemiumNew
  • AI rewriting, translation and citation finding for manuscripts
  • MS Word add-in and Chrome extension for Docs and Overleaf
  • Free plan: 5 AI uses per day and 200 language suggestions per month
  • PDF chat, plagiarism and AI detection on paid tiers

Parallel

AI Search & Answer Engines
freemium
  • Recurring monthly free allowance of several thousand requests
  • Deep research + entity monitoring with webhooks
  • Confidence-scored 'Basis' source verification framework

PDF.ai

AI OCR & Document Extraction
freemium
  • Chat-with-PDF product plus a separate parse/extract/split PDF API
  • Popular ChatPDF-category alternative with API access for developers

Perplexity

AI Search & Answer Engines
freemium
  • Cited, real-time answers (1B+ queries/quarter)
  • Focus modes and file uploads
  • Comet browser and Spaces
  • Strong free tier

Praktika

Language Learning AI
freemium
  • Free tier with basic AI-avatar conversation practice, low-cost premium
  • Real-time pronunciation feedback and structured speaking/reading/listening lessons
  • Positions itself as a low-cost alternative to private tutoring

Quizlet

AI Tutors & Learning
freemium
  • AI flashcards and practice tests from notes
  • Q-Chat tutor and study guides
  • Learn mode adapts to you
  • Free core features

Recall

YouTube & Content Summarizers
freemiumNew
  • Summarizes YouTube videos, articles and PDFs into a linked knowledge graph
  • Free forever plan: 10 AI summaries per month, unlimited saving and notes
  • API and MCP access even on the free plan
  • No credit card required

Reducto

AI OCR & Document Extraction
freemium
  • 15,000 free starter credits, no card required
  • Citation-ready structured JSON across 30+ file types
  • Edits extracted data back into original PDF/DOCX layout

Scholarcy

Academic Research
freemium
  • Auto-generates 'summary flashcards' from papers/reports in seconds
  • Chrome extension for one-click summarization while browsing
  • Free tier for individual summaries; paid for libraries/teams

SchoolAI

AI for Teachers & Classrooms
freemium
  • 'Spaces' let teachers design their own AI learning experiences for students
  • 'Mission Control' dashboard tracks live student engagement/progress
  • ESSA Level III validated for improving critical thinking; free teacher tier

SciSpace

Academic Research
freemium
  • Explain and chat with any paper
  • Literature review and comparison tables
  • Paraphrase and citation help
  • Free tier

Surya OCR

AI OCR & Document Extraction
freemiumNew
  • 650M-parameter OCR VLM covering 90+ languages
  • Layout analysis, reading order and table recognition
  • 83.3% on olmOCR-bench
  • Free playground at datalab.to; weights free for research, personal use and small startups

Symbolab

AI Tutors & Learning
freemium
  • Step-by-step explanations across algebra, calculus, trig, geometry, physics
  • Multiple input methods: typed, natural language, or photo
  • AI chat support for follow-up questions on a solution

TalkPal

Language Learning AI
freemium
  • Supports 130+ languages for conversational AI practice
  • Free tier plus a 14-day free trial of premium features
  • 10M+ users, 4.7 app-store rating, 300+ unique conversation scenarios

Tavily

AI Search & Answer Engines
freemium
  • 1,000 free API credits/month, no card required
  • Search + Extract + Research + Crawl + Map endpoints
  • 300M+ monthly requests, 2M+ developers

Turbo AI (formerly Turbolearn)

AI Tutors & Learning
freemium
  • Converts uploaded PDFs/videos/recordings into notes, flashcards, quizzes, and podcasts
  • AI lecture notetaker records and organizes notes live
  • 10M+ learners, rebranded from Turbolearn to Turbo AI in 2026

Twee

AI for Teachers & Classrooms
freemium
  • Generates CEFR-aligned (A1-C2) texts, dialogues, and exercises across 10 languages
  • AI auto-grading for multiple-choice, written, and gap-fill responses
  • 500,000+ teachers, 6M+ exercises created, ~5 hrs/week saved claimed

Undermind

Academic Research
freemium
  • Exhaustive, agentic literature search
  • Finds hard-to-surface papers
  • Explains why each result matters
  • Free searches to start

Upstage Document AI

AI OCR & Document Extraction
freemium
  • Parse/Extract/Classify/Instruct pipeline billed per page
  • Classify and Instruct currently free in beta
  • Free 1-year access to Document Parse for schools/hospitals/nonprofits

ELSA Speak

Language Learning AI
freemium
  • Free plan includes AI role-play conversations and real-time pronunciation feedback
  • Speech-analysis engine trained specifically on English pronunciation accuracy
  • 92M+ downloads, 4.9-star rating, content from HarperCollins/Pearson/Oxford

Khanmigo

AI Tutors & Learning
freemium
  • Socratic AI tutor from Khan Academy
  • Guides instead of giving answers
  • Teacher tools included
  • Free for teachers; low-cost for learners

Mistral OCR 4

AI OCR & Document Extraction
freemium
  • Self-hostable single-container OCR model for regulated industries
  • 170 languages, bounding boxes and per-field confidence scores
  • Low per-thousand-page API pricing; free to try inside Le Chat

Photomath

AI Tutors & Learning
freemium
  • Free Basic plan with full step-by-step explanations and visual aids
  • Camera-based problem scanning including word problems
  • Covers elementary through college-level math (algebra to calculus)

Kagi Assistant

AI Search & Answer Engines
trial
  • Bundled with Kagi's paid ad-free search subscription
  • Lets users pick underlying model (Claude, GPT, Gemini)
  • Deep research/thread mode with citations

Scite

Academic Research
trial
  • 'Smart Citations' show whether a paper is supported, contrasted, or just mentioned by later work
  • Browser extension and Zotero/reference-manager integrations
  • Search and Assistant need a paid plan; the free tier excludes them and trials auto-enroll into a subscription.

Eightify

YouTube & Content Summarizers
trial
  • Summarizes YouTube videos up to 10 hours long in ~5 seconds
  • Translations/summaries in 40+ languages
  • Uses both Claude and GPT models under the hood per vendor
  • Autonomous AI agent that runs literature review + data analysis cycles, condensing ~6 months of research into a day per vendor
  • Publicly available via web interface and API, not an internal-only research demo
  • Kosmos itself requires a paid subscription; the free plan covers only standard agents.

AlphaSense

Deep Research & Documents
  • AI search across SEC filings, earnings transcripts, broker research, private data
  • Enterprise workflow automation for financial/deal research
  • Integrates FactSet, S&P Capital IQ, PitchBook

Duolingo Max

AI Tutors & Learning
  • AI roleplay and 'Explain My Answer'
  • Video-call practice with Lily
  • Gamified language learning
  • The Max AI features are exclusive to paid Max subscribers; the free Duolingo app does not include them.

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