What is the benefit of upgrading to Lex Pro?

Upgrading to Lex Pro provides access to the biggest and best AI models (like GPT 4.1 and Claude 4 Opus & Sonnet), early access to new features, and priority support via email.

Is Lex secure and private?

Yes, all data on Lex is privately and securely hosted on their own database with strict access policies. User writing is not used to train the AI models.

Can I use Lex with my team?

Yes, it is free to share and collaborate on Lex documents. Lex Teams offers unlimited group use of Lex folders for extensive collaboration.

What kind of writing is Lex designed for?

Lex is designed for any writing that goes through an edit process and needs to be high quality, such as academic papers, customer-facing copy, important emails, and fiction writing.

Does Lex offer refunds?

Yes, if you don’t love Lex after a month, you can reach out for a refund. Initial subscriptions can be canceled for a full refund within ten calendar days.

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AI Tools

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Lex

Best for writers

AI-powered editor

Collaborative documents

Freemium model

Easy to use

Collaborative documents with powerful AI editing tools for writers.

Last updated: May 30, 2026

FREEMIUM

lex.page

Quick Answer

Lex is an AI-powered word processor that offers collaborative document creation and editing with integrated AI tools. It provides AI feedback, version control, and real-time collaboration, leveraging premium LLMs like GPT 4.1 and Claude 3.5 Sonnet. Best for writers and marketers who need an intelligent editor and collaborative workspace. A free tier is available, with premium features for Lex Pro subscribers.

About Lex

Lex is an AI-powered word processor designed for writers and marketers to create and edit documents collaboratively. It offers AI feedback, version control, and real-time collaboration features. A freemium model is available, with premium AI models for subscribers.

What Makes It Unique

Lex provides flexibility in the rapidly evolving AI ecosystem, allowing users to easily plug the latest best-in-class LLMs like Claude 3.5 Sonnet and GPT 4.1 into their workflow without switching services.

AI-extracted from public sources. May contain errors. Methodology · Are you Lex? Claim listing

Use Cases & Target Users

Use Cases

Best For

Generating first drafts for content marketers

Collaborating on documents with team members

Getting AI feedback on academic papers

Optimizing customer-facing copy with AI

Drafting important emails and fiction writing

Company Size

SOLO

SMALL

MEDIUM

ENTERPRISE

Fit Score

Complexity

Intermediate

Target Team Size

INDIVIDUAL

SMALL_TEAM

LARGE_TEAM

Target Skill Level

BEGINNER

INTERMEDIATE

EXPERT

Key Features

AI Feedback on drafts

Brainstorming ideas with AI

AI re-writing capabilities

Real-time comments and keyboard shortcuts

Document version control and history

Mobile web access for collaboration

Technical Specifications

API Available

SDK Available

MCP Compatible

Open Source

Team Features

SSO/Enterprise

Webhook Support

Has Demo

Function Calling

Browser Extension

Sandbox Mode

Audit Logs

Free Plan

No Signup

Works Offline

Requires Host App

Framework

MCP Server

IDE Plugin

Inference API

SCIM Provisioning

Developer Access

API

ENTERPRISE

Deployment:

CLOUD

Uses models:3

Compliance, Privacy & Trust

GDPR (as claimed): Yes

SOC 2 (as claimed): No

HIPAA (as claimed): No

Trains on user data: No

Pros

+Minimalist interface for focused writing
+Access to premium AI models like GPT 4.1 and Claude 4 Opus for higher quality output
+Seamless integration of AI editing tools directly within the document
+Real-time collaboration and version control features
+Early access to new features and priority support for Pro users
+No user writing is used to train AI models

Limitations