Best Upstream Alternatives & Competitors

AI sidebar and browser agent for reading, writing and research

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

One browser agent that combines every major AI model with web automation

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

ChatGPT in your browser sidebar, without switching tabs

Summarize, bookmark and write with AI right in your browser

Your GPT-powered sidekick for every page, PDF and video

A Mac browser built for focus, with an AI companion called Airis

Group your chaotic browser tabs automatically with AI

The agentic AI browser that reads your tabs, files, and screenshots as context

Scrape any website by chatting with it in plain English

Organise and retrieve your browser tabs with AI