TextCortex

TextCortex is an AI writing and productivity assistant designed to work everywhere you do — through a browser extension, its assistant (Zeno) is available across websites and apps to help you write, rewrite, summarize, and research without switching tabs. It can also connect to your own knowledge base to ground its answers in your information. For people who want a flexible AI helper available in the flow of their actual work, TextCortex is a capable, well-rounded choice.

What is TextCortex?

TextCortex is an AI writing and productivity assistant built around flexibility and being available across the tools you already use. Its core is a browser extension and assistant (branded Zeno) that works on top of websites and web apps, letting users generate and rewrite text, summarize content, translate, brainstorm, and get help without leaving the page they are on. Beyond general writing, it offers customization and knowledge integration: users can connect their own knowledge bases or documents so the assistant answers grounded in their specific information, and create custom personas or templates tailored to their needs and brand voice. It typically supports many languages and offers various content templates (emails, blog content, marketing copy, and more), along with the ability to use different underlying AI models. Its aim is to be a versatile AI companion embedded in a user’s workflow rather than a separate destination. It targets professionals, writers, marketers, and knowledge workers who want AI assistance in context. TextCortex offers a free tier with paid plans for more usage and features. (AI output should be reviewed and fact-checked.)

What it does well

• Works everywhere: browser extension across the web.
• Zeno assistant: write, rewrite, summarize, and research.
• Knowledge integration: grounded answers from your content.
• Customizable: personas, templates, and model choice.

Who it is for

TextCortex fits professionals, writers, marketers, and knowledge workers who want a flexible AI assistant available in the flow of their actual work — via a browser extension that works across websites and apps — for writing, rewriting, summarizing, and research, with the option to connect their own knowledge base for grounded answers and to customize personas and templates. Its embedded, customizable approach is the draw. Those wanting a single powerful chatbot destination may just use a frontier model directly, and AI output should always be reviewed and fact-checked. Heavier use needs a paid plan. For versatile, in-context AI writing and research help, TextCortex is a capable, free-to-start choice.

Things to keep in mind

• AI output should be reviewed and fact-checked before use.
• Those wanting one chatbot destination may prefer a frontier model directly.
• More usage and features require paid plans.

Our verdict

TextCortex is a capable, well-rounded AI writing and productivity assistant whose strength is being available wherever you work: through a browser extension, its Zeno assistant helps you write, rewrite, summarize, translate, and research across websites and apps without switching tabs. It goes further than a generic writer by letting you connect your own knowledge base for grounded answers and build custom personas and templates for your brand voice. For people who want a flexible AI helper embedded in their actual workflow rather than a separate destination, that is genuinely useful. AI output still needs review and heavier use is paid, but for in-context AI writing and research, TextCortex is a solid, free-to-start choice.

Frequently asked questions

What is TextCortex?

TextCortex is an AI writing and productivity assistant with a browser extension and an assistant (Zeno) that works across websites and apps to help write, rewrite, summarize, and research.

What is Zeno?

Zeno is TextCortex’s AI assistant, available via browser extension across the web, that helps with writing, rewriting, summarizing, translating, and research in context.

Can TextCortex use my own knowledge?

Yes — you can connect your own knowledge bases or documents so the assistant answers grounded in your specific information, and create custom personas and templates.

Is TextCortex free?

TextCortex offers a free tier, with paid plans for more usage and features.