Otio describes itself as your personal librarian for the web. It comes in two cooperating parts: a Chrome extension that lives in the bottom-right of every page, and a web workspace at otio.ai where the saved material is actually put to work. The extension has around 4.5 stars from a modest but real user base, and the developer is Frontdoor Labs Ltd in London.
The value proposition is aimed squarely at research that spans weeks or months. Rather than losing your sources when a chat session resets, Otio keeps a permanent, searchable library organised by project — a thesis separate from client work, a market analysis that grows as new data arrives. Upload 60 papers one month and add 30 client documents the next, then question all 90 sources together. Saving is designed to be frictionless: a save button appears in the corner of pages, with native-style placement on YouTube, X, Substack and Medium, and a keyboard shortcut for everything else.
On the workspace side, Otio reads and indexes PDFs, articles, video transcripts, podcasts, tweets, spreadsheets and scanned documents via OCR, then supports chat and dual-model chat, summarisation, note-taking, deep research and visualisation. The most-repeated claim is citation quality: answers point back to the exact page and passage so references can be checked rather than trusted blindly. Otio publishes a free entry tier and markets itself against both session-based chatbots and source-capped notebooks, and its marketing cites more than 200,000 professionals and researchers across 74 languages.
