Solo1

ClosedAI lets you ask questions across your own files (lecture slides, PDFs, notes, contracts, manuals) and get answers that cite the exact file and page. Upload documents, organise them into units (one per course or project), and chat in plain language. When your files don't cover a question, the assistant says so and labels any general knowledge separately. Built for people with scattered documents and little time. Per-user data isolation on every query, signed uploads, rate limits, account deletion, and uploaded text treated as untrusted data. Stack: Next.js, FastAPI, Supabase (Postgres with pgvector), Voyage embeddings, and [MODEL NAME] for answers. Open source (MIT).