Best Lookup AI Alternatives & Competitors

Highlight any text and get an AI explanation in under a second

Real-time AI answer engine and research workspace combining live web citations with frontier reasoning models.

One-click AI assistant for browsing, writing and research

AI sidebar and browser agent for reading, writing and research

All-in-one AI assistant across web, browser, desktop and mobile

Highlight the web, learn in public, and build your AI clone

An AI copilot in your browser for reading, summarizing and questioning anything on the page.

Turn any highlighted phrase into a quick on-page AI lesson.

AI browser extension that reads quiz questions and answers them with explanations

Highlight any text, get an instant AI answer without leaving the page

Select any text and get an instant AI explanation in a popup

A low-cost AI assistant that lives in your browser tab