Lex

Lex is a minimalist collaborative document editor with AI editing tools built in: draft feedback, rewrites, brainstorming, custom commands and one-click title ideas. The site says it is closed to new customers while existing accounts continue to work, so it is best read as a reference point against open alternatives.

Lex is a writing app that pairs a stripped-down document editor with AI assistance that stays inside the page rather than in a separate chat window. Documents are collaborative from the start: a shared link lets another person open the file, sign in with one click, and see changes as they are typed. The same link can be sent read-only when a draft is ready for readers instead of co-authors. The AI is framed as an editor, not a generator. Writers can request feedback on a draft, ask for help brainstorming, or have a passage rewritten, and a set of commands offers shortcuts for finding a better word or producing a list of ideas. Title suggestions come from the AI with one click, versions let a writer try a different phrasing without losing the original, and comments work as expected with keyboard navigation. Testimonials on the site describe using Lex for reports, articles, novels, lecture notes, interview preparation and journaling, which suggests a general-purpose tool rather than one aimed at a single genre. In practice the product suits people who already write and want faster iteration on their own sentences: marketers, students, novelists, founders, and teams that share drafts. It is closest in spirit to Google Docs, and one quoted user calls it a replacement for that, but the comparison stops at the AI layer, which other users describe as being aware of the document's context. Track changes is listed as coming soon, so heavy editorial workflows still need another home for now. The important caveat is availability. The homepage states that Lex is no longer accepting new customers while existing accounts keep working, and it directs questions to an email address. Anyone evaluating it today should treat it as a closed product: the feature set and the testimonials describe what subscribers have, not what a new signup can obtain. Alternatives such as Google Docs with a writing assistant, or Notion with AI, cover similar ground and remain open to new accounts. Platform detail is thin. A testimonial from an iPad Pro owner praises an iOS version that syncs across devices, and the site separately mentions mobile web collaboration without an app download, but no desktop clients or integrations are documented.