TextCortex

TextCortex is an AI writing companion that works across the web — composing, rewriting, and translating in the tools where writing actually happens.

Overview

TextCortex goes beyond a chat box. Its browser extension brings AI into email, docs, and content editors, offering inline rewrites, tone adjustments, and length changes on selected text. A configurable assistant called Zeno can be tuned with custom personas and knowledge so output matches a user’s voice and context. The platform includes templates for marketing copy, product descriptions, and social posts, plus summarization and translation for research work.

Users like that assistance follows them across the web instead of living in a separate tab: select text in an email and reshape it in place. The customizable personas help non-native writers match house tone, and templates cover the marketing formats teams reuse constantly.

Key Features

• Browser extension with inline rewriting and tone control
• Customizable assistant personas and knowledge bases
• Templates for marketing, sales, and e-commerce copy
• Summarization, translation, and citation helpers
• Cross-platform availability including web and mobile
• Inline rewrite, summarize, and translate actions
• Custom personas and knowledge bases
• Templates for ads, emails, and product copy

Users like that assistance follows them across the web instead of living in a separate tab: select text in an email and reshape it in place. Custom personas help non-native writers match house tone, and templates cover the marketing formats teams reuse constantly.

The knowledge base feature keeps outputs grounded in product facts and brand language, which reduces editing time. Browser coverage means the same assistance works in email, docs, and social scheduling tools without copy-paste.

Pricing

A free plan provides daily creation credits; paid subscriptions raise limits and unlock premium models, custom personas, and knowledge features.

Who Is It For

Marketers, founders, and non-native English writers who want AI help embedded in everyday writing tools. It fits writers who want AI embedded where they already work.