ChatGPT Deep Research
Deep Research & Documents
- Runs up to ~30 min for exhaustive reports
- Browses hundreds of sources
- Structured, cited long-form output
- Limited runs on lower tiers
Research & Learning (10)
10 free AI deep-research and document tools and 1 more — pricing tier and real capabilities on every entry. No ads, no sponsored placement.
AllAI Search & Answer EnginesDeep Research & DocumentsAcademic ResearchAI Tutors & LearningAI OCR & Document ExtractionAI for Teachers & ClassroomsLanguage Learning AITravel PlanningAI Shopping AssistantsYouTube & Content SummarizersScience & Research AI
freemium
Gemini Deep Research
Deep Research & Documents
- Multi-step research across the web
- Editable research plans
- Long, organized reports
- Available with Gemini
NotebookLM
Deep Research & Documents
- Grounded answers from your own sources
- Audio Overviews (podcast-style)
- Mind maps and study guides
- Free tier available
ChatPDF
Deep Research & Documents
- Chat with any PDF or document
- Cited answers with page references
- Summaries and key points
- Free daily PDFs
STORM (Stanford)
Deep Research & Documents
- 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
- 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
- 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
- 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
- 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
- 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
Deep Research & Documents — straight answers
What are the best free AI deep-research and document tools?
Flocci AI Tools lists 11 AI deep-research and document tools, ordered free tiers first: MiroThinker, STORM (Stanford), Tongyi DeepResearch, GPT Researcher and ima.copilot (Tencent ima). 10 of the 11 are free or have a free tier. Every entry states what it uniquely does, not a score.
Are there completely free AI deep-research and document tools?
Yes — 6 of these are marked fully free with no paid plan attached: MiroThinker, STORM (Stanford), Tongyi DeepResearch, GPT Researcher and ima.copilot (Tencent ima). The rest are freemium, trial or paid, and each row states which.
What should I look for in AI deep-research and document tools?
Start with what you need to do: read a pile of sources and get a grounded report. Then check the pricing tier, because "free" here means no paid plan at all while "freemium" means a free tier under paid plans. Every tool on this page lists both.
See the full list →Head-to-head comparisons
MiroThinker vs STORM (Stanford)MiroThinker vs Tongyi DeepResearchGPT Researcher vs MiroThinkerima.copilot (Tencent ima) vs MiroThinkerMiroThinker vs Open NotebookSTORM (Stanford) vs Tongyi DeepResearchGPT Researcher vs STORM (Stanford)ima.copilot (Tencent ima) vs STORM (Stanford)
Free alternatives
ChatGPT Deep Research alternativesGemini Deep Research alternativesNotebookLM alternativesChatPDF alternativesSTORM (Stanford) alternativesGPT Researcher alternativesTongyi DeepResearch alternativesMiroThinker alternatives
Looking for a ranked shortlist instead? See the best free AI deep-research and document tools.