CreateBases

Base turns a pile of documents into a permissioned, shareable knowledge base. Upload files and Base extracts a cited knowledge index: claims, entities, events, timelines, and figures that disagree across sources. Every extracted claim is grounded in a verbatim quote from a source document, and anything that cannot be matched back to its source is dropped rather than guessed.

Connected to Claude, Base lets you search across every knowledge base you own or have been given, read the derived index rather than re-reading raw files, reconcile numbers that conflict between documents, and pull whole documents or spreadsheet rows when you need to compute over them. With write access you can add documents, revise spreadsheets in place, leave comments, and open task threads so collaborators and their own AI assistants can see what work is already in flight.

Permissions are enforced on the server, never in the interface. A claim is published only when the reader can see every source supporting it, so a summary can never reveal something the reader was not allowed to read directly. Share links can be revoked or expired at any time, and access is re-checked on every single call.