Lumen is an AI document intelligence tool for teams. Connect your PDFs, Notion pages, Google Drive files, and Slack threads, then ask questions in plain English. Lumen returns direct answers with citations back to the exact source passage — so you can verify every claim.

Always. Every answer ships with numbered citations that link to the specific paragraph, page, or message it was drawn from. If a claim isn't supported by your documents, Lumen says so instead of guessing.

Yes — that's the whole point. Drag and drop PDFs and DOCX files, or connect Google Drive, Notion, and Slack for continuous sync. Lumen indexes your content and keeps the index fresh as files change.

Yes. The Pro plan includes a REST API (POST /v1/ask) and an embeddable chat widget, so you can build source-backed answers into your own product, internal tools, or docs site.