Lex
AI writing tool that adapts to your voice
What is Lex?
How to Use Lex
Getting started with Lex is straightforward. Follow these steps to set up your account, configure the AI to match your voice, and start producing better content faster. Whether you're a solo writer or part of a team, this guide will help you unlock Lex's full potential.
Create Your Account and Choose Your AI Model
Sign up at lex.page with your email or Google account. Once inside, head to the settings to select your preferred AI model—GPT-5 for creative writing or Claude 4.1 Opus for analytical content. You can switch between models anytime as you work on different documents.
Set Up Your Style Guide for Personalized Writing
Navigate to the Style Guides section and create a new guide. Paste samples of your best writing—blog posts, emails, or reports—and let Lex analyze your voice. Name your guide (e.g., 'Professional Tone' or 'Casual Blog') and apply it to any new document so the AI writes in your style.
Create a Knowledge Base to Provide Context
Upload relevant background materials such as research papers, brand guidelines, or previous projects into a Knowledge Base. When you start a new document, attach the Knowledge Base so the AI has full context about your topic, audience, and requirements before generating any text.
Start Writing with AI Assistance
Open a new document and start typing. Use the chat feature to brainstorm ideas, ask for outlines, or request rewrites. Apply Checks for line-level suggestions on grammar, clarity, and style. Save your best instructions as custom Prompts so you can reuse them with one click.
Use Version Control and Collaborate with Your Team
Lex automatically saves versions of your document as you write. Use Rewind to view and restore any previous version. To collaborate, share your document, prompts, or folders with team members. Everyone can work together with the same Style Guides and Knowledge Bases for consistent output.
Lex Core Features
Lex Use Cases
- 1Professional writers can use Lex to draft, edit, and refine long-form content like articles, essays, and books with AI that learns their voice through Style Guides and writes with full context via Knowledge Bases.
- 2Content creators and marketers can streamline their workflow by using custom prompts for social media posts, email newsletters, and blog articles while maintaining consistent brand tone across every piece.
- 3Students and academics can leverage Lex's AI models to research topics, outline papers, and polish essays with proper citations and academic tone, all while keeping version history for revisions.
- 4Business owners and entrepreneurs can generate marketing copy, proposals, reports, and internal communications with AI trained on their brand guidelines and industry knowledge.
- 5Teams and agencies can collaborate on documents in real-time, share style guides and knowledge bases, and use version control to track changes across projects and writers.
Pros and Cons of Lex
Pros
- Multiple premium AI models available in one platform including GPT-5 and Claude 4.1 Opus, giving writers flexibility to choose the best model for each task
- Style Guides and Knowledge Bases enable deep personalization, allowing the AI to write in your unique voice and with full project context—a standout feature vs competitors
- Built-in version control (Rewind and Versions) and team collaboration tools make Lex ideal for professional writing workflows and content teams
- Affordable pricing at $14.99/month with a money-back guarantee offers excellent value compared to similarly featured AI writing tools
✕ Cons
- AI usage limits on the free tier and even Pro plans may restrict heavy users who need extensive daily writing assistance across multiple projects
- Learning curve to master advanced features like Style Guides, Knowledge Bases, and custom prompt engineering—new users may need time to unlock full potential
- Limited public information about the company's founding history and long-term product roadmap, which may concern enterprise buyers evaluating stability
Lex vs Top Alternatives
| Feature | Jasper | Copy.ai | Writesonic | Grammarly |
|---|---|---|---|---|
| AI Models Supported | Broader AI model selection including GPT-5 and Claude 4.1 Opus | Access to premium models not available on Copy.ai's platform | Premium model selection including GPT-5 justifies the price difference | Full generative AI capabilities vs Grammarly's editing-focused approach |
| Voice & Style Personalization | Style Guides offer deeper voice customization than Jasper's brand voice | Knowledge Bases provide richer contextual writing than Copy.ai | Style Guides offer superior voice training vs Writesonic's templates | Style Guides enable proactive AI writing in your voice, not just corrections |
| Collaboration & Version Control | Built-in version control with Rewind & Versions not available in Jasper | More robust version control and document history features | Better team collaboration with shared prompts and folders | More comprehensive document management and version control |
| Starting Price | Significantly more affordable at $14.99/mo vs Jasper's $39/mo | Comparable pricing with more advanced features included | Slightly higher priced but with advanced personalization features | Similar Pro pricing with far more generative and collaborative features |
Lex Pricing
Free
- Access to select AI models
- Limited AI tokens per month
- Basic writing assistance
- Community prompt library access
Pro Monthly
- All AI models including GPT-5 and Claude 4.1 Opus
- Unlimited AI tokens
- Style Guides and Knowledge Bases
- Version control with Rewind & Versions
- Collaboration tools for teams
- Priority support
- Early access to new features
- Money-back guarantee
Pro Yearly
- Everything in Pro Monthly
- 2 months free (equivalent to $14.99/month)
- Priority support
- Early access to new features
Lex FAQ
What is Lex and who is it for?+
How does Lex's Style Guides feature work?+
What AI models does Lex support?+
Is Lex free to use?+
Can I collaborate with my team on Lex?+
What is the money-back guarantee policy?+
How do AI Tokens work in Lex?+
Lex Review — Editor's Score
Who Should Use Lex?
Professional writers, content creators, students, academics, and small to medium-sized teams who want a sophisticated AI writing assistant that adapts to their personal or brand voice without the enterprise price tag. Perfect for anyone who found Jasper too expensive or Grammarly too limited.
Lex is a refreshing take on AI writing tools, prioritizing personalization and craftsmanship over volume. Style Guides and Knowledge Bases genuinely set it apart from competitors, making it ideal for writers who want AI that adapts to their voice rather than generic output. While there's a learning curve to master the advanced features, the value for money at $14.99/month is excellent. It's not just another AI text generator—it's a thoughtful writing environment built for people who care about the craft.
- Style Guides enable true voice personalization that few competitors match
- Multiple premium AI models (GPT-5, Claude 4.1 Opus) in one platform
- Built-in version control and collaboration tools for team workflows
- Excellent value at $14.99/month with a money-back guarantee
📺 Lex Tutorials & Introduction
LEX AI: The Best AI Writing Tool? - YouTube
Lex Review: How to Keep Friends and Write Better - YouTube
Lex: this AI writing tool will help you write your next blog post
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