Lex is an AI-powered collaborative word processor for writers, combining shared documents with AI feedback, rewriting, title suggestions, and live editing.
About
Lex is a web-based word processor that combines collaborative document editing with built-in AI writing assistance. It addresses a common gap for writers who draft in traditional tools like Google Docs but want AI feedback, rewriting help, and idea generation available directly inside the editor rather than in a separate chat window.
The product, made by Lex, Inc., works as a minimalist document editor where users can draft, share links for real-time collaboration, and ask the AI to critique, rewrite, or brainstorm within the same page. Additional conveniences include version history, title suggestions, keyboard-driven AI commands, and read-only publishing links. The site reports that Lex is used by more than 300,000 writers. Notably, the company is no longer accepting new customers, and existing accounts continue to function as before.
Key Features
Pricing & Fees
- Pricing: Not publicly listed on the pages we reviewed; check the official site for current plans. A paid Lex Pro tier exists with details shown only to logged-in existing users.
- Closed to new customers: Lex is not accepting new signups; existing accounts continue to work as usual, and support is available by email.
- Free collaboration: Sharing and collaborating on Lex documents is free, with a Lex Teams add-on enabling unlimited group use of folders.
- Premium models: Lex Pro subscribers reportedly get access to premium models such as GPT 4.1 and Claude 4 Opus and Sonnet, plus early feature access and priority email support.
Who It's For
Lex is aimed at writers whose work goes through an editing process: academics polishing journal submissions, marketers refining customer-facing copy, professionals drafting important emails, and fiction writers who need a second set of eyes on a manuscript. It also suits teams that co-write documents and want AI assistance embedded in the same workspace. Because new signups are closed, it is currently most relevant to existing account holders evaluating whether to upgrade to Lex Pro.
FAQ
What is Lex?Lex is an AI-powered, collaborative word processor that lets writers draft, share, and edit documents with built-in AI feedback, rewriting, and idea-generation tools.
Is Lex free to use?Sharing and collaborating on documents is free; a paid Lex Pro subscription adds premium AI models, early feature access, and priority support. Exact Pro pricing is visible only to logged-in existing users.
Is Lex still accepting new users?No. Lex is no longer accepting new customers, though existing accounts continue to function normally.
Is writing on Lex private and secure?Data is hosted on Lex's own database with strict internal access policies, and Lex states it does not train language models on user writing and has no immediate plans to do so.
Which AI models does Lex use?Lex uses models from OpenAI, Anthropic, and TogetherAI through enterprise APIs, with premium models such as GPT 4.1 and Claude 4 Opus and Sonnet available to Pro subscribers.
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