An AI knowledge base, shared by you and your agent.
Everything you read.Your AI can find.
Keep everything you read in one place — then let an AI search and answer across all of it, with citations you can open.
Beta · macOS
AI knowledge base
Your sources, notes, and answers in one place.
Everything you read, one place
Every PDF, paper, and web page in collections and tags — with full-text search that even understands 中日韩.
Chat with what you're reading
Attach a page or a selection and ask — Oak answers right beside the document, in context, with formatted notes, code, and rendered math.
Translate inline, never break flow
Select any passage to see it in your language right beside the original — sentence by sentence, no copy-paste, no jumping to a separate translation app.
Go deep on any word
Tap a word for a rich card — meaning, nuance, collocations, and a one-line gist.
Highlight, note, keep
Mark up any page and your notes collect in one panel — text and image clippings, searchable across everything you read.
The web, built in
Search, open a link, and read live pages with your logins intact — then save what matters to your library.
Model-agnostic
Use any model. Switch anytime.
Pick the best model for each question — from frontier labs to a local one on your Mac. You decide.