Khoj is described as 'Open-source AI second brain that learns from your notes (Obsidian, EMACS), documents, and has access to the internet. It can replace your search engine, help you with reading papers, and get you transparent, fast answers' and is a AI Chatbot in the ai tools & services category. There are more than 100 alternatives to Khoj for a variety of platforms, including Web-based, Mac, SaaS, Windows and iPhone apps. The best Khoj alternative is ChatGPT, which is free. Other great apps like Khoj are DeepSeek, Lumo by Proton, Mistral Le Chat and Perplexity.