Kith

Kith is a knowledge companion for professionals who work with dense, domain-specific material every day. **How it works** 1. Select any text on a page — a legal clause, a medical term, a code pattern, a design concept — and the Kith card appears with a contextual explanation shaped by the surrounding document. 2. Or drag over a chart, diagram, UI screenshot, or blueprint to get a visual analysis of what you marked. 3. Save the explanations worth keeping to The Archive, your private reference library that accumulates knowledge over time. **Why context matters** "Cell" means something different to a biologist than to a developer. Kith reads the surrounding material — page title, headings, nearby paragraphs — so the explanation fits the domain you are actually working in. **Key features** • Contextual text explanations — highlight any term and get an explanation aware of the surrounding page • Visual region analysis — drag to capture charts, blueprints, medical imagery, or UI screenshots • The Archive — save, search, and organize your explained concepts into a personal encyclopedia • Go deeper — request expanded explanations when the initial summary isn't enough • Related concepts — click related terms to continue exploring without leaving the card • Private mode — reduce retained detail for sensitive work • Site rules — allowlist, blocklist, or enable on all sites • Hotkey support — Cmd+Shift+L to explain selection, Cmd+Shift+V for vision capture **Built for trust** The extension never calls AI model APIs directly. Every inference routes through the Kith backend. Your account, quotas, and billing state stay visible and explicit — not hidden inside the overlay. **Plans** • Trial — 3 days, 12 text explanations and 2 visual analyses per day • Starter — 40 text and 10 vision per day • Pro — 120 text and 30 vision per day Selected page content is transmitted only after you invoke an explanation or visual analysis. Kith also processes account, entitlement, quota, and saved-Archive data as described in the privacy policy. There is no advertising or passive browsing history collection.