Lex review: AI word processor for writers; closed to new customers, existing accounts continue

What Lex does

A web word processor with AI that gives feedback, rewrites text and suggests titles, and lets others collaborate through shared links.

Lex is a web-based word processor with built-in AI, aimed at people who write and edit a lot. Documents can be shared through a link, so collaborators can join with one click and watch each other type live, and a read-only link lets readers view a finished piece. The AI side covers feedback on a draft, brainstorming, rewriting, shortcut commands for finding a word or generating a list of ideas, and one-click title ideas. The editor also includes comments, versions for trying alternative phrasings without losing the original, and keyboard navigation. Track Changes is listed as coming soon.

According to the pricing page, a Lex Pro subscription adds access to larger AI models such as GPT 4.1 and Claude 4 Opus & Sonnet, early access to new features, an iOS app, and priority email support. The vendor says Lex uses models from OpenAI, Anthropic, and TogetherAI through enterprise APIs, and that it is not training language models on your writing. Sharing and collaborating on documents is described as free, and a Lex Teams add-on enables unlimited group use of folders.

Pricing is not published on the official site: the pricing page shows plan details to logged-in existing users only. The site also states that Lex is no longer accepting new customers, while existing accounts keep working. The vendor mentions a refund if you are unhappy after a month.

• AI feedback on drafts
• Brainstorming and rewriting
• AI shortcut commands
• One-click title ideas
• Live collaboration via shared link
• Read-only publishing links
• Version history
• Comments with keyboard shortcuts

Our take

Lex reads as a writing-focused editor that pairs a document workspace with AI feedback, rewriting and title tools, plus link-based sharing. It suits existing users who want to keep working in it and who care about the vendor's stated privacy approach and access to larger AI models through Lex Pro. It does not fit anyone shopping for a new tool today: the official site says Lex is no longer accepting new customers, and pricing is not published on the official site. Track Changes is still listed as coming soon, so teams that need it should look elsewhere. We have not tested the product; this summary comes only from the official pages.