PaperBrain
- FastAPI
- LangChain
- ChromaDB
- Gemini Embeddings
- OpenRouter
- SQLite
- PyMuPDF
A retrieval-augmented reading room
Every answer cited back to the page it came from — and to nothing else.
File your sources first, then start the conversation. PaperBrain ingests PDFs, web pages and YouTube transcripts into a private, per-chat index, then answers questions strictly from that material. When it cannot find the answer in your documents, it says so rather than inventing one.
- Multi-source ingest: PDFs to 50 MB, live web pages, YouTube transcripts
- Every answer footnoted back to its source passage
- Conversational memory across the last three turns
- Answer presets — Auto, Brief, Explain, Pointers, Detailed
- Swappable models through a single OpenRouter gateway
- Private accounts; your sources are never pooled with anyone else's