Best Tooltips AI Alternatives & Competitors

AI sidebar and browser agent for reading, writing and research

Chat with any PDF, video, or website and get cited answers in seconds

Summarize, bookmark and write with AI right in your browser

One AI assistant that plugs ChatGPT, Claude and Gemini into every tab

Bottom Line Up Front for every page, PDF and video you read

Reader mode, text-to-speech and AI summaries for any web page

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

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

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

Read with an AI mentor that highlights, explains and discusses your books

Free / Open-sourceSummarize YouTube, Google, and any page with AI — free in your browser

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