Retrivo Vault is a small SaaS where you upload your own documents and ask questions about them. Every answer shows where in your documents it came from, and if the answer isn't there it says so instead of guessing. I built it alone, from design to launch. Backend in Node and Express, search on MongoDB Atlas, answers from Gemini, frontend in React with TypeScript. Code: github.com/Ahmadhsn1/Rag-saas-RetrivoVault