AI second brain that remembers everything — notes, files, Gmail, Notion, and answers instantly

An AI-powered personal knowledge management platform that connects scattered information across notes, Google Drive, Gmail, Notion, Readwise, local files, and other sources into a searchable second brain. The platform remembers user information, uncovers relationships between ideas, answers questions using personal knowledge, and delivers reminders and daily briefings based on connected data. Built on a local-first AI architecture with on-device embeddings, a local vector database, hybrid local and cloud retrieval, and a knowledge graph engine, the platform prioritizes privacy while supporting desktop, web, and mobile experiences. Key Highlights ✅ AI-powered second brain for personal knowledge management ✅ Connects notes, Google Drive, Gmail, Notion, Readwise, and local files ✅ Answers questions using a user's own connected knowledge and data ✅ Includes reminders, daily briefings, and automatic concept discovery ✅ Built on a local-first AI architecture with knowledge graph and hybrid search ✅ Serves approximately 200 paying subscribers, 15.1K registered users, and a 12K-subscriber email list

Niche down on one area that we found signals in: - Researcher-heavy flows for academic labs to quickly connect and recall ideas across the huge amounts of papers they've saved up - Consultancy / advisory firms and setting up a sync of all their data sources to allow recall of important client details in seconds instead of hours of scouring

I'm 23 and I want to build someting like Cursor. I initially built this product for myself but I see a venture scale opportunity for it in areas I don't enjoy, so only if someone likes doing sales + these areas of expansion, they can do well in. Otherwise, for a general horizontal, even with an AI second brain, it's hard to fully expand it without an urgent pain point such as the niches I identified. Other niches include: - Law firms with huge amounts of documents and notes -> instantly recall details for a file