GPTZero
The World's #1 AI Content Detector with over 8 Million Users
VS
Grok
AI assistant by xAI for chat, creation, and real-time answers.
Detailed comparison
Criteria
GPTZero
Grok
Pricing
Freemium
Freemium
Plans & pricing
Free: Free, Enterprise: Custom
Basic (Standalone): Free, SuperGrok (Standalone): $30/mo, SuperGrok Heavy (Standalone): $300/mo, X Premium (Grok Access): $8/mo, X Premium+ (Grok Access): $40/mo, Grok Business (SuperGrok): $30/mo, Grok Business (SuperGrok Heavy): $300/mo, Enterprise: Custom
Free trial
No
No
Audience
b2c
b2c
Platforms
Web
Web
API
No
No
Open Source
Proprietary
Proprietary
Categories
Security, information technology & services, AI content detection
Communication, information technology & services, Chatting
Popularity
Very High
Very High
Description
GPTZero is the best free AI detector, trusted by over 8 million users. Simply paste your text to instantly get an overall AI score and advanced senten...
Grok is an AI assistant built by xAI. It allows users to chat, create images, and write code. It also provides real-time answers sourced from the web ...
Pricing
GPTZero
Freemium
Grok
Freemium
Plans & pricing
GPTZero
Free: Free, Enterprise: Custom
Grok
Basic (Standalone): Free, SuperGrok (Standalone): $30/mo, SuperGrok Heavy (Standalone): $300/mo, X Premium (Grok Access): $8/mo, X Premium+ (Grok Access): $40/mo, Grok Business (SuperGrok): $30/mo, Grok Business (SuperGrok Heavy): $300/mo, Enterprise: Custom
Free trial
GPTZero
No
Grok
No
Audience
GPTZero
b2c
Grok
b2c
Platforms
GPTZero
Web
Grok
Web
API
GPTZero
No
Grok
No
Open Source
GPTZero
Proprietary
Grok
Proprietary
Categories
GPTZero
Security, information technology & services, AI content detection
Grok
Communication, information technology & services, Chatting
Popularity
GPTZero
Very High
Grok
Very High
Description
GPTZero
GPTZero is the best free AI detector, trusted by over 8 million users. Simply paste your text to instantly get an overall AI score and advanced senten...
Grok
Grok is an AI assistant built by xAI. It allows users to chat, create images, and write code. It also provides real-time answers sourced from the web ...
Features
GPTZero
Multi-model AI detection (ChatGPT, GPT-5, Gemini)
Overall AI score and sentence by sentence analysis
Instant text pasting for detection
Scan potential AI text in any document
Free AI checking
Grok
Chat functionality
Image creation
Code generation
Real-time answers from the web
Real-time answers from X platform
Key differentiators
GPTZero
- Trusted by 8M+ users
- Advanced sentence-by-sentence AI detection
- Multi-model AI detection
Grok
- Real-time answers from X platform
- AI assistant by xAI
- Multimodal AI (text, image, code)
Other comparisons
FAQ: GPTZero vs Grok
GPTZero: The World's #1 AI Content Detector with over 8 Million Users. Grok: AI assistant by xAI for chat, creation, and real-time answers.. Both tools take different approaches to address similar needs.
Both offer a free or freemium plan. GPTZero is freemium and Grok is freemium.
The best choice between GPTZero and Grok depends on your specific needs. Compare their features, pricing, and target audience on this page to find the tool that best fits your use case.
Both are primarily designed for individuals. The choice depends on which specific features you need.
GPTZero offers: Multi-model AI detection (ChatGPT, GPT-5, Gemini), Overall AI score and sentence by sentence analysis, Instant text pasting for detection, Scan potential AI text in any document. Grok offers: Chat functionality, Image creation, Code generation, Real-time answers from the web.
Based on our data, Grok currently enjoys greater popularity. However, popularity isn't the only factor — compare features to find the right tool for your needs.