MaxAI

MaxAI is a freemium browser extension that adds one-click AI to any webpage using multiple leading models. It rewrites and improves text, fixes grammar, adjusts tone, summarizes webpages, PDFs, and YouTube videos, and translates across languages. Bootstrapped and based in San Francisco, it is reported to have over a million users and uses a simple free-plus-Pro pricing model aimed at individuals who want fast writing and reading help while they browse.

MaxAI (maxai.co, also known as MaxAI.me) is a browser extension that layers one-click AI over your browsing, using multiple leading models such as options built on GPT, Claude, and Gemini. It focuses on fast, in-place actions: improve or rewrite selected text, fix grammar, adjust tone, summarize webpages, analyze PDFs, summarize YouTube videos, and translate across languages. The pitch is speed and convenience, activating help exactly where you are rather than in a separate app. MaxAI is reported to be used by more than a million people and carries a large number of positive extension reviews. It is bootstrapped and based in San Francisco, with no disclosed venture funding. The pricing model is simpler than most rivals: a free tier with daily caps on chats and fast responses, and a single Pro plan rather than a long tier ladder. In the AI-sidebar space MaxAI competes with Monica, Sider, and Merlin. Its selling points are simplicity and a strong writing-assistance focus. The trade-offs are a narrower feature set than the most maximal rivals, no public API, and some historically reported complaints about billing and cancellation that prospective buyers should factor in.