Khoj - AI for Humans | WarmIndex

Khoj is your open-source, self-hostable AI second brain that enables chatting with any LLM, semantic search across your documents and the web, building custom agents, and automating research.

🚀 Overview

Khoj is a versatile personal AI application designed to act as your second brain, helping you organize, search, and interact intelligently with your personal knowledge base and online information. It solves the problem of information overload and siloed data by providing semantic search, retrieval-augmented generation (RAG), and agentic workflows that work privately on your device or at scale in the enterprise.

It's built for power users like Obsidian and Emacs note-takers, developers experimenting with LLMs, researchers needing deep web/doc dives, and teams requiring customizable AI without big tech dependencies. The project emerged from a tiny team of hackers focused on applied AI research to deliver safe, useful tools that scale from personal use to production.

Khoj emphasizes self-hosting, open-source transparency, and flexibility with any LLM, making AI accessible and controllable.

✨ Key Features

Chat with local or online LLMs (GPT, Claude, Llama, Mistral, etc.) augmented by your docs and web search (what it does: provides context-aware responses; why matters: turns raw data into actionable insights)
Advanced semantic search on personal files (PDFs, Markdown, Notion, Word, org-mode) for fuzzy, meaning-based retrieval
Build custom agents with personas, tools, knowledge bases, and automations like scheduled newsletters/notifications
Multi-platform access: Browser (app.khoj.dev), Desktop app, Android (beta), Obsidian/Emacs plugins, WhatsApp
Offline support, image generation, voice-to-text chat, RAG pipelines
Upcoming: More enterprise features, expanded data sources

🛠 Tech Stack

Frontend: TypeScript, JavaScript, CSS, HTML, Bun
Backend: Python, FastAPI, Django (ORM), Gunicorn
Database: PostgreSQL (via Django), Redis (inferred for caching), vector embeddings for search
Auth: Custom / Google OAuth for multi-user
Hosting: Docker, Docker Compose, Vercel/Cloudflare (cloud app), self-host

👥 Who Is This For?

This project is useful for:

Developers who want to query codebases, build/test AI agents locally
Teams looking for self-hosted knowledge management and automation
Indie makers and researchers building personal AI second brains with private data

📸 Screenshots / Demo

Live demo: https://app.khoj.dev
GitHub: https://github.com/khoj-ai/khoj

🔥 Project Status

🟢 Actively building

Last updated: 2026-03-24

❓ FAQ

Is this project free?

Yes / Freemium / Open Source (Self-host completely free. Cloud app at app.khoj.dev free to start with limits; Enterprise plans for teams at khoj.dev/teams.)

Is the source code available?

Yes — https://github.com/khoj-ai/khoj

Can I contribute?

Yes — Join via GitHub issues/PRs. Start with "good first issues". See contributing guide: https://docs.khoj.dev/contributing/development. Help with code, docs, testing LLMs/search, designs.