Khoj

Where it runs

• Web
• iOS
• Android
• macOS
• Windows
• Linux

Tags

• #second-brain
• #rag
• #self-hosted
• #open-source
• #research

• View Consensus details

  ResearchFREEMIUM

  CO

  Consensus

  Consensus

  AI search over 200M+ peer-reviewed papers, with citations.

  An academic search engine that runs natural-language questions against a corpus of more than 200 million peer-reviewed papers and synthesizes the findings with inline citations. Its Consensus Meter aggregates how much the studies agree or disagree, and a copilot helps draft literature reviews. Aimed at researchers, students, and clinicians.

  AI insight: Its 'Consensus Meter' summarizes whether a body of papers agrees or disagrees on a question, going beyond surfacing individual citations.

  • research
  • academic-search
  • citations
  • literature-review

  Open
• View Elicit details

  ResearchFREEMIUM

  EL

  Elicit

  Elicit (formerly Ought)

  AI research assistant for literature review and evidence synthesis.

  Searches, summarizes, and extracts structured data across 125M+ academic papers, with sentence-level citations. Goes beyond chat-over-papers with a guided systematic-review workflow covering search, screening, extraction, and report synthesis. A free Basic plan offers unlimited search and summaries; paid tiers add data-extraction volume and the review pipeline.

  AI insight: One of the few research tools with a real systematic-review screening pipeline, benchmarked against Cochrane reviews.

  • research
  • literature-review
  • systematic-review
  • citations

  Open
• View SciSpace details

  ResearchFREEMIUM

  SC

  SciSpace

  SciSpace

  AI research assistant: search, read, and review the literature.

  AI workspace for academics that searches a corpus of 280M+ papers, runs literature reviews, and answers questions over PDFs with citations. Adds writing aids like a paraphraser and citation generator. Formerly Typeset.io; introduced agentic 'Deep Review' literature search in 2025. Free Basic tier with paid upgrades.

  AI insight: Formerly Typeset.io; pairs a 280M-paper index with agentic 'Deep Review' literature search added in 2025.

  • research
  • literature-review
  • papers
  • citations
  • +1

  Open
• View Google AI Studio details

  ResearchFREE

  GO

  Google AI Studio

  Google

  Prototype with Gemini — prompts, multimodal, and instant API keys.

  Google's free playground for building with Gemini — prompt design, multimodal input, structured output, and one-click export to API code. The fastest way to start building on Gemini.

  AI insight: The free front door to the Gemini API — prototype in the browser, then export the exact call as code with one click.

  • prototyping
  • gemini
  • api
  • playground

  Open
• View GPT Researcher details

  ResearchBYO KEYOSS

  GP

  GPT Researcher

  Assaf Elovic / Tavily

  Autonomous AI agent that runs deep multi-source web research and writes cited reports.

  An open-source autonomous research agent that plans a task, runs parallel multi-source web searches, validates sources, and synthesizes a cited report. It runs locally as a Python package, FastAPI server, or MCP server, and works with any LLM provider plus a search/retriever backend. Free and Apache-2.0 licensed — you only pay your own LLM and search-API costs.

  AI insight: An open-source take on 'deep research' — it fans out parallel searches and cites sources, runnable as a library or an MCP server.

  • open-source
  • self-hosted
  • research
  • agent
  • +1

  Open
• View NotebookLM details

  ResearchFREEMIUM

  NO

  NotebookLM

  Google

  Grounded research notebook — chat your sources, get Audio Overviews.

  Google's source-grounded research tool — upload docs, PDFs, and links, then ask questions answered only from your material, with citations and shareable Audio Overviews. Powered by Gemini.

  AI insight: Answers strictly from your uploaded sources — no open-web drift — and its Audio Overviews turn a doc set into a two-host podcast.

  • research
  • rag
  • citations
  • audio-overview

  Open
• View arxiv-sanity-lite details

  ResearchFREEARCHIVED

  AR

  arxiv-sanity-lite

  Andrej Karpathy

  Personalized arxiv reader by Andrej Karpathy.

  Tag-and-track arxiv papers without drowning in the firehose. Train it on the topics you follow — edge inference, multi-agent harnesses, memory architectures — and it builds a personal feed.

  AI insight: Karpathy's own tool, open-source and self-hostable — a tag-trained recommender that tames the arXiv firehose into a personal feed.

  • arxiv
  • papers
  • research
  • open-source

  Open
• View Hugging Face details

  ResearchFREEMIUM

  HU

  Hugging Face

  Hugging Face

  Models, datasets, papers, spaces. The AI research commons.

  Source-of-truth for open-weights models and datasets. Daily-paper feed for tracking research; Spaces for trying ideas without setting up infra. The default home for any model not behind a paid API.

  AI insight: One account spans model weights, datasets, runnable Spaces, and a daily papers feed — the closest thing to a commons for open AI.

  • models
  • datasets
  • papers
  • open-source

  Open