Lex
Collaborative documents, with powerful AI editing tools.
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Quick Answer
Lex is an AI writing assistant for professionals and academics that offers AI feedback, version control, and live collaboration. It integrates with GPT-4.1 and Claude 4 Opus models. Best for founders writing documents and iterating drafts, or writers seeking AI assistance for editing and brainstorming. It is no longer accepting new customers; existing accounts keep working.
Lex is an AI-powered word processor for writers and teams that offers AI feedback, version control, and live collaboration. It integrates with various AI models like GPT-4.1 and Claude 4 Opus for enhanced writing quality. Lex provides a premium writing experience for quick notes to complex documents. Lex is no longer accepting new customers. Existing accounts will keep working as usual.
Lex allows users to easily plug the latest best-in-class LLMs into their workflow, avoiding the hassle of constantly switching between different services. It also offers personalized AI writing suggestions without using user content for model training.
Decision Intelligence
Best For
AIType
Free Trial
No
Credit Card
Not Required
Free Plan
Yes
Dimension Scores
· 5.2 avgHow good it is, across universal quality axes
Task Scores
· 6.1 avgWhat it can do, per category it works in · showing 8 of 10 tasks scoring 5+
Scores are AI-estimated from publicly available data — not an independent test or a verified user rating. How we rank →
- -No longer accepting new customers
- -Track Changes feature is coming soon
- -Pricing information for Lex Pro is only visible to existing users upon login
- -AI limits apply for free users
- -Does not respond to or honor Do Not Track signals
- -Cookie-based opt-outs are not effective on mobile applications
Complexity
Company Size
Target Team Size
Target Skill Level
Privacy & data handling
The Model(s) Behind It
Model details — extracted from public vendor sources by our pipeline (Smart Generator + A3 cross-referencing) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.
Base Models
Turn your business processes into AI agents.
Integrates to improve newsletter writing process
Auto-updated
Trust Score
Good
Based on 6 data signals
Confidence: High
Reflects publicly available data, not an independent audit
No published data
Not yet checked
Some details are AI-generated estimates — verify with the vendor.
AI-generated estimate: Best For, Limitations, What Makes Unique
How we source dataAI Governance & Regulatory Disclosures
Legally-sensitive fields — extracted from public vendor sources by our pipeline (Smart Generator + A3 cross-referencing) or admin-entered. Shown as claimed by the vendor; not independently audited by Intelloro.
Switching & Migration
Pricing verified from the vendor pricing page.
User Reviews
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Who It's For3 rolesWriters and AuthorsTechnical WritersEditors
Platform, Content & Languages3 content types7 languagesTextDocumentEmailEnglishSpanish+9 more
Content Types
Accepts
Produces