TextCortex
AI writing assistant with a browser extension that works everywhere.
01 Brief // Summary
TextCortex is an AI writing assistant with a browser extension that works across 4,000+ apps — Gmail, Notion, LinkedIn, and more. Its Zeno AI persona can be trained on your own documents to match your exact writing style.
02 Optimal Deployment
- ▸Writing anywhere in the browser
- ▸Brand voice personalisation
- ▸Email and document drafting
- ▸Multi-platform content creation
03 Initialization Sequence
- 01
Install the TextCortex extension from textcortex.com.
- 02
Highlight any text and press the shortcut to rewrite, expand, or translate.
- 03
Train your custom persona by uploading your own writing samples.
// FIELD NOTES · PRO TIPS
- ◆Install the browser extension so it works everywhere you write — email, docs, social.
- ◆Set up your persona/knowledge base so output matches your voice and facts.
- ◆Use it for rewriting and expanding rather than generating from zero — that's where it's strongest.
- ◆Keep a human edit pass; AI drafts are a starting point, not a final send.
04 At a Glance
Strengths
- +Writing anywhere in the browser
- +Brand voice personalisation
- +Email and document drafting
- +Multi-platform content creation
- +Free tier you can start with today
Things to consider
- !The free plan has limits; advanced features need a paid plan.
- !Pricing and features change often — confirm current details on the official site.
- !AI output should be reviewed before you rely on it.
Placement reflects our editorial assessment of fit for this use case, not paid placement. Some links may be affiliate links — this never changes our rankings. How we rank →
05Alternatives & Related
06 Frequently Asked Questions
What is TextCortex?
An AI writing assistant with a browser extension that drafts, rewrites, and summarizes text across the web, plus a customizable knowledge base.
Is TextCortex free?
Yes — a free tier with daily creations; paid plans add more usage, features, and customization.
What is TextCortex best for?
Writers who want AI help inside every app via a browser extension, rather than switching to a separate tool.