TextCortex AI markets itself as the modern writer’s co-pilot.
It’s built around three solid pillars:
- Company Knowledge → internal search engine for insights
- Workflow Automation → tireless assistant for repetitive tasks
- Writing Assistance → AI ghostwriter that blends right into Gmail, Zendesk, and even your docs
You can feed it up to 100GB of company data, create AI agent profiles, and even paraphrase in multiple styles to suit your brand’s personality.
It’s fast, structured, and polished. It has everything you’d want in an AI built for efficiency.
But can TextCortex AI outsmart AI detectors?
We decided to find out.
So we put it to the head-to-head test with GPTZero, Originality.ai, and Undetectable AI to see if its polished sentences could pass as genuinely human or not.
In this TextCortex review, we’ll break down its pricing, features, and detection results. By the end, you’ll know whether TextCortex AI is worth your investment or not.
Let’s dig in.
Key Takeaways
- TextCortex AI writes fast but fails AI detection (flagged 93–100% even after “humanizing”). Use Undetectable AI for safe, human-like content.
- Built on Gemini 2.0 Flash, TextCortex automates writing, integrates with Gmail and Docs, and speeds up team workflows.
- Powered by its own NeoCortex model with 100GB knowledge bases, tone control, and AI agent profiles for brand consistency.
- Upside: It’s fast, customizable, and affordable ($6.99/month). Downside: It can be 100% flagged by GPTZero & Originality.ai, low burstiness, and robotic flow.
- Undetectable AI rewrites text structurally, passing detectors with 99%+ success and 100% ZDNet accuracy which makes it the smarter, safer choice.
What Is TextCortex?
TextCortex AI is an AI tool that helps people and teams save time on writing and data tasks.
It started in 2020, when Ceyhun Derinbogaz and Dominik Lambersy built a simple copywriting tool to help users write faster and beat writer’s block.
Since then, it’s grown a lot. By 2025, TextCortex AI has become a powerful AI platform for businesses.
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It now helps companies automate complex work and make sense of messy data, turning it into clear, useful information.
If we sum it up in one line → TextCortex AI is built to create the most personalized AI experience possible.
It helps companies build AI assistants that sound like them by matching their tone, writing habits, and brand voice.
The founders started TextCortex AI because they saw how fast the world was moving toward digital content, and they wanted to make writing easier and smarter for everyone.
In 2022, they raised $1.2 million in Seed funding to bring that idea to life. While other startups used the same public AI models, TextCortex built their own model, called NeoCortex.
This gave them more control over how their AI worked and how it could be improved. Of course, it also came with challenges.
Competing with big tech companies backed by billions meant proving that their own model could be just as smart and creative.
Overview of TextCortex
Key Features
TextCortex AI is an advanced AI writing and productivity platform powered by Google Gemini 2.0 Flash.
This tool helps teams and individuals automate their writing, research, and daily workflows for enhanced productivity.
Let’s look at the key features of this tool:
- The Three Pillars of TextCortex
TextCortex AI runs on three main pillars that make work faster, smarter, and more organized. These pillars are:
- Company Knowledge
This feature helps teams manage company data without the chaos. It’s designed to help users quickly find what they need, get summaries, and extract key insights.
It can understand documents, and helps in making decisions faster and with more confidence.
- Workflow Automation
This pillar saves time by taking care of repetitive work. Tired of doing the same tasks again and again? This tool will handle them.
Bored of manual reports or endless follow-ups? It’ll take care of those too.
It automates everyday workflows and helps teams focus on work that actually moves the business forward, while keeping accuracy and speed intact.
- Writing Assistance
This pillar is designed for simplicity and consistency.
It connects with the tools you already use like Gmail, Outlook, Zendesk, and Freshdesk, so you can work with AI right inside your everyday apps.
2. Customization
- Custom Knowledge Bases
You can upload up to 100GB of your company’s files including PDFs, docs, spreadsheets, or slides, and even connect cloud drives like Google Drive or OneDrive.
Zeno studies this data and uses it to give accurate, context-based answers whenever you interact with it.
- AI Agent Profiles
Need different AI assistants for different jobs? You can create them with TextCortex. Set roles like “Academic Researcher” or “Customer Support Agent” and define how each should respond.
This keeps tone, reasoning, and quality consistent across all communication.
- Core Writing Tools
TextCortex AI also includes tools for brainstorming, rewriting, summarizing, and translating in multiple languages.
It checks tone and grammar automatically, and helps teams produce professional writing without sounding robotic.
Pricing and Plans
Understanding TextCortex pricing is essential before committing to the platform.
Here’s a detailed breakdown of the TextCortex pricing structure:
| Plan Tier | Monthly Cost (Monthly Billing) | Annual Cost (Monthly Equivalent) | Creations (Approx. Words) | Key Features / Restrictions |
| Free | Free | N/A | Limited Daily Creations | Access to most core features. Great for testing and short daily tasks. |
| Premium (Minimum) | $6.99 | $5.59 | 150 Creations (≈18,650 words) | Includes writing and paraphrasing tools. Ideal for freelancers and light users. |
| Premium (Mid-Tier) | Scales Up | Scales Up | Up to 2,800 Creations (≈350,000 words) | Designed for marketers, writers, and content teams with higher workloads. |
| Unlimited | $119.99 | $83.99 | Unlimited Creations | Unlimited Custom Agents, Unlimited Knowledge Bases, 100GB Storage. Best for large teams and high-volume operations. |
| Enterprise | Contact Us | Contact Us | Tailored Volume | Custom API integration, private deployment, and dedicated enterprise support. |
How Does TextCortex Work?
To begin using the platform, you’ll need to complete the TextCortex login process.
The TextCortex login is straightforward and takes just a few minutes to set up your account.
We tested TextCortex AI to see how well it writes and whether its content can bypass AI detectors.
The goal was to check two things:
- How natural the text is
- How well it can avoid being flagged as AI
We created three 400-word samples:
Block 1: Fully human-written paragraph
Block 2: Text generated by TextCortex AI
Block 3: TextCortex AI output processed with its “Humanize” or “Rewrite” feature
Each block was checked using three top AI detectors: GPTZero, Originality.ai, and Undetectable AI.
Let’s find out the results:
Results
- Block 1 (Human text): All detectors correctly said 0% AI.
- Block 2 (TextCortex AI):
- GPTZero: 100% AI
- Undetectable.ai: 50% human
- Originality.ai: 100% AI
- Block 3 (Humanized TextCortex AI):
- GPTZero: 100% AI
- Undetectable.ai: 93% AI
- Originality.ai: 100% AI
Based on our TextCortex review, the platform is great at creating readable and structured content quickly. But even after using its paraphrasing feature, its output is still mostly detected as AI.
Undetectable AI showed the most balanced and accurate performance in our testing. It correctly identified human-written text as human, AI-generated text as AI, and even flagged paraphrased content accurately.
All three detectors we used (GPTZero, Originality.ai, and Undetectable AI) are reliable since they were also top-performing tools in ZDNet’s benchmark study.
But Undetectable AI stood out by showing consistent precision across all types of content, proving it can distinguish subtle differences between real human writing and AI output with impressive accuracy.
TextCortex vs. Undetectable AI
TextCortex AI and Undetectable AI don’t compete, they complete each other.
TextCortex AI generates structured, high-volume content, while Undetectable AI ensures that content passes detection systems without risk.
| Metric | TextCortex (NLG Focus) | Undetectable AI (Authenticity Focus) |
| Core Goal | Rapid content generation & workflow automation | Risk mitigation & detection-proof output |
| Detection Performance | Content flagged by GPTZero, Originality.ai, etc. | 100% accuracy in ZDNet benchmark |
| Humanization Tech | Basic paraphrasing (tone/style change only) | Deep structural rewrite using AI-bypass algorithms |
| Data Integration | Internal: Knowledge Base uploads for contextual writing | External: Cross-verification across detectors |
| Ideal User | Teams needing fast drafts | Users needing human authenticity (SEOs, students, researchers) |
What Makes Undetectable AI the Superior Choice
Undetectable AI stands out because it’s built to make your AI-written text look and sound completely human, even under strict AI detection systems.
Here’s what makes it better:
- Proven Accuracy: In ZDNet’s 2025 benchmark, Undetectable AI scored 100% accuracy, correctly identifying both AI and human-written text. It’s one of only five tools worldwide to achieve this.
- High Bypass Rate: It has a 99%+ success rate in passing top detectors like GPTZero, Originality.ai, and Copyleaks. That means your content stays safe from being flagged.
- Deep Language Rewriting: Unlike basic rewording tools, it rewrites text at a structural level. It changes sentence rhythm, word variation, and pacing to remove all AI-like patterns.
- Custom Humanization Control: You can adjust tone (formal, casual, academic), choose readability level, and preview the result through its built-in AI detector before finalizing.
- Designed for Real-World Use: Whether you’re publishing SEO content, academic papers, or client reports, Undetectable AI ensures your work passes AI checks without losing meaning or flow.
Can TextCortex Detect AI-Edited or Paraphrased Text?
No. TextCortex AI cannot reliably detect advanced AI-edited or paraphrased text. Its NeoCortex engine is designed for content generation, not for identifying or removing AI traces.
The system produces structured, statistically consistent language patterns, which means it lacks the burstiness (variation in rhythm, pacing, and word choice) found in natural human writing.
This low burstiness and low entropy make TextCortex AI outputs easy targets for AI detectors that look for predictable sentence patterns and repetitive phrasing.
To detect, or better yet, disguise those patterns, you need specialized multi-model algorithms capable of analyzing and recreating natural linguistic irregularities.
That’s where Undetectable AI’s suite of tools steps in.
| Tool | Function | How it Evades Detection | Best Use Case |
| AI Paraphrasing Tool | Rewrites sentences and paragraphs to change wording and phrase order while keeping meaning. | Varies word choice and local sentence structure to reduce surface-level AI markers. Good for batch edits. | Quickly reworking TextCortex AI drafts or bulk content before a deeper humanize pass. |
| AI Chat (Humanizer Chat + Extension) | Interactive editor that rewrites text in context (works inside Google Docs, email, etc.). | Uses conversational prompts to adjust tone, break patterns, and apply context-aware edits across a document. | Mid-stage editing when you need context-aware rewrites or in-place fixes. |
| AI Stealth Writer | Full-document deep rewrite engine that restructures syntax, pacing, and rhythm. | Alters sentence rhythm, syntactic patterns, and lexical variety; applies multi-model checks to ensure low detection scores. | Final-stage humanization for high-stakes content (academic, SEO, client deliverables). |
Give our AI Detector and Humanizer a try in the widget below!
Conclusion
TextCortex AI does one thing well: it generates content fast. But in a world where AI detectors are getting smarter by the day, “fast” isn’t enough anymore.
You need “fast + undetectable“, and that’s where the TextCortex AI + Undetectable AI combination can help.
Use TextCortex AI to crush your drafts, then run everything through Undetectable AI before publishing.
It’s the workflow that keeps your content human, your rankings safe, and your reputation intact.
After all, the best AI writing strategy isn’t the one that works the hardest, it’s the one that works the smartest.
Try Undetectable AI today to make your content truly stand out.