TextCortex AI

TextCortex AI is a GDPR-compliant, EU-hosted enterprise AI platform founded in 2021 by Ceyhun Derinbogaz and Dominik Lambersy in Berlin, Germany. It combines RAG-powered knowledge bases, custom AI agents, a conversational AI assistant (ZenoChat), and a browser extension that works across 30,000+ apps.

Trusted by 2M+ users including enterprise teams at Siemens and Lamborghini, it's built for organizations that need AI deeply integrated with their own internal data and workflows.

• RAG-Powered Knowledge Bases — Upload internal documents, PDFs, URLs, and data sources so your AI agents generate answers grounded in your organization's actual knowledge — not just general internet data.

• Custom AI Agents — Build purpose-specific AI agents for sales, legal review, customer support, HR, and more that autonomously execute multi-step workflows using your connected knowledge sources.

• ZenoChat with Custom Personas — A conversational AI that supports fully customizable AI personas, each with their own role, tone, and knowledge context — deployable across any web app via the browser extension.

• Browser Extension (30,000+ Apps) — A universal browser extension that embeds AI assistance directly into Gmail, LinkedIn, Google Docs, Notion, Salesforce, and 30,000+ other web tools — no tab switching required.

• Multi-Model LLM Switching — Access GPT-4o (OpenAI), Claude (Anthropic), Gemini (Google), and Mistral models from a single platform and switch between them per task based on output quality needs.

• 100+ Writing Templates — Pre-built prompts covering blog posts, ad copy, product descriptions, emails, social media, translations, and paraphrasing across 25+ languages.

• Enterprise Knowledge Search — Search across all uploaded internal knowledge sources with AI-powered retrieval that surfaces precise answers with cited source references.

• GDPR-Compliant EU Hosting — All data is stored exclusively on EU servers; none of your content is used for model training or fine-tuning — a critical requirement for regulated industries and European enterprises.

TextCortex AI is built for knowledge-heavy organizations and professionals who need AI that understands their specific business context — not just general prompts.

• Enterprise Teams & Operations Managers — Deploy custom AI agents connected to internal SOPs, manuals, and data to automate recurring workflows and reduce knowledge-silo bottlenecks across departments.

• Marketing & Content Teams — Use ZenoChat personas, 100+ templates, and the browser extension to produce on-brand content, translations, and copy across Gmail, Google Docs, and 30,000+ other tools without leaving your workflow.

• Sales Professionals — Build sales-specific AI agents that generate personalized proposals, outreach emails, and competitive responses using internal product knowledge and CRM context.

• Compliance-Sensitive Industries (Legal, Healthcare, Finance) — EU-hosted, GDPR-compliant infrastructure with no model training on user data satisfies strict regulatory requirements that rule out US-hosted AI tools.

• Freelancers & Solo Professionals — The free plan and browser extension offer daily AI writing assistance, paraphrasing, and translation in 25+ languages across every website you work on — at zero cost.

TextCortex stands apart by positioning itself not as another AI writer but as a full knowledge infrastructure layer for organizations — making it fundamentally different from tools that only generate content.

• RAG + Proprietary Data Processing — TextCortex's Retrieval-Augmented Generation uses its own proprietary data processing layer on top of standard RAG, delivering more precise and contextually accurate answers from uploaded internal knowledge than vanilla RAG implementations provide.

• Truly Universal Browser Coverage (30,000+ Apps) — While most AI browser tools work on a handful of popular sites, TextCortex's extension operates on virtually every web app in your workflow — from niche CRMs to custom internal portals — without any configuration per site.

• Multi-LLM Flexibility in One Platform — Most AI tools lock you into one provider. TextCortex lets you access GPT-4o, Claude, Gemini, and Mistral under one subscription and switch between them per task — so you always use the strongest model for each specific use case.

• EU-Native GDPR Architecture — Unlike most AI tools that bolt GDPR compliance onto a US-hosted infrastructure, TextCortex was built from the ground up with EU-only hosting — a structural privacy advantage that matters enormously for regulated industries in Europe.

• Purpose-Built AI Agent System — Rather than offering a generic chatbot, TextCortex lets you build distinct AI agents for separate business functions — each with its own knowledge base, persona, and task scope — creating a true AI team rather than a single general-purpose assistant.

TextCortex is designed for maximum cross-platform reach, operating through a browser extension, desktop app, and web panel that collectively cover virtually every tool in a modern professional's stack.

• Google Workspace (Gmail, Google Docs, Google Sheets) — The browser extension embeds ZenoChat and writing tools directly inside Google Workspace apps, enabling AI-assisted drafting, summarization, and knowledge search without leaving the Google environment.

• Microsoft Suite (Word, Outlook, Teams) — TextCortex integrates with Microsoft Office tools, cited specifically on the platform as a key enterprise differentiator — enabling AI assistance inside documents and emails for Microsoft-centric organizations.

• LinkedIn, Twitter/X & Social Media Platforms — The browser extension activates on LinkedIn and Twitter/X, enabling AI-assisted post writing, personalized outreach, and content repurposing directly inside social media feeds.

• Notion, Salesforce, HubSpot & 30,000+ Web Apps — Any site or web application that opens in a browser is covered by the extension — from project management tools to CRM platforms — with no per-site configuration required.

• Windows & macOS Desktop Apps — Full TextCortex functionality is available as a native desktop application for both operating systems, giving offline-capable AI assistance outside the browser environment.

TextCortex AI has successfully evolved from an AI writing tool into one of the most credible enterprise knowledge and agent platforms in Europe, earning a 4.9/5 rating from 2,500+ users across G2, Trustpilot, and Capterra.

At $29.99/month per user for the Premium plan, it delivers RAG-powered knowledge bases, multi-model LLM access, a 30,000+ app browser extension, and bullet-proof GDPR compliance — a combination that makes it particularly compelling for European enterprises and regulated industries.

Solo users and small teams will find the free plan and browser extension immediately valuable, while larger organizations will see the clearest ROI from custom AI agents connected to their internal knowledge architecture.