Artificial Intelligence

GPTZero vs Originality.ai: Which Detects AI Content Better?

04/28/2025
by Zoran Trimmel
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In today’s digital world, it’s super important to make sure your content is real and original. But what if your writing gets flagged as AI-generated? No worries! Two popular tools can help: Originality.ai vs GPTZero.

Let’s take a quick look at them and see how they stack up against each other.

GPTZero vs Originality.ai: A Quick Overview

Originality.ai

Originality.ai is a top choice for checking if content is unique and not just copied. It claims to have a 99% accuracy rate in finding AI-generated text. This includes content from advanced AI models like GPT-4 and ChatGPT. Plus, it offers a plagiarism checker, fact-checking features, and readability scores. This tool is perfect for web publishers, agencies, and creators. It helps ensure that everything you publish is trustworthy.

Originality AI Homepage

Originality AI Homepage

GPTZero

GPTZero is another strong contender in the AI detection game. Like Originality.ai, it also boasts a 99% accuracy rate. It can identify text from popular platforms like ChatGPT, GPT-4, and Claude. This tool is popular, trusted by over 8 million users and 3,500 universities around the world. It doesn’t just stop at detecting AI content; GPTZero also offers plagiarism detection and deep content analysis features.

GPTZero Homepage

GPTZero Homepage

Comparing GPTZero vs Originality.ai: 4 Key Features

Now, let’s compare some key features of these two tools. It’ll give us a better idea of which one might work best for you. Ready? Let’s dive in!

Feature Originality.AI GPTZero
Target Audience Best for web publishers, content creators, and SEO professionals with enterprise needs. Ideal for educators, journalists, and small businesses.
AI Detection Accuracy 99% for GPT-4, Gemini Pro, and other AI Writing Tools, more robust at detecting subtle AI-generated content. 99% for GPT-4, ChatGPT, Claude, etc, but may have false positives when detecting human-written text.
Plagiarism Detection Advanced plagiarism detection and fact-checking. Basic plagiarism detection.
Multi-Language Support Supports multiple languages Primarily English.
Ease of Use Easy interface but with more advanced features. Simple interface
Free Plan No Yes

AI Detection Accuracy

Originality.ai claims to have 99% accuracy in spotting AI-generated content. That’s pretty impressive! It focuses on big models like GPT-4, Gemini Pro, and Claude 3.5. The tool analyzes text structure and patterns to determine if AI created it. Plus, it can handle multiple languages, which is great for global content. If you’re a publisher, you’ll appreciate that it can scan entire websites for AI content. It also has an API for easy integration into your current systems.

Now let’s talk about GPTZero. This tool also boasts a 99% accuracy rate. It shines when detecting content from popular models like GPT-4 and ChatGPT. GPTZero uses advanced techniques such as perplexity and burstiness to analyze sentence patterns. This helps it figure out if something was written by AI. However, it might struggle a bit with texts that mix AI and human writing. But overall, it’s super handy for quick detection, especially in schools and workplaces.

We recently decided to test out various AI detection tools to see how effectively they work with different content types.

100% AI-Generated Content

First up was 100% AI-generated text—no human touch at all! We were excited to find out how well these tools could spot it. Stay tuned for our findings!

AI-generated content detection by Originality.ai

AI-generated content detection by Originality.ai

GPTZero detects AI-generated content

GPTZero detects AI-generated content

Mixed Content (Human-Edited AI Content)

Let’s dive into the topic of mixed content! It’s a fascinating area that combines the best of both worlds: content initially created by AI but then given a human touch through editing. This blend can lead to some intriguing outcomes, but it also brings up some interesting challenges.

Human-edited AI content detection by Originality.ai

Human-edited AI content detection by Originality.ai

Mixed AI and human content detection by GPTZero

Mixed AI and human content detection by GPTZero

100% Human-Written Content

Originality AI does a fantastic job at detecting human-written content. It tested a fully human-created text and found it to be 99% human-written! That’s impressive and shows there were hardly any mistakes.

Human-written content detection by Originality.AI

Human-written content detection by Originality.AI

Human content with AI overlap detected by GPTZero

Human content with AI overlap detected by GPTZero

These tests reveal how Originality.ai consistently offers higher accuracy in detecting both AI-generated and human-edited content, whereas GPTZero can sometimes struggle, especially with 100% human-written content.

Plagiarism Detection Capabilities

Originality.ai offers an advanced AI-powered plagiarism checker with up to 90% accuracy in detecting global plagiarism, including complex forms like paraphrasing and mosaic plagiarism. It scans content in multiple languages, making it suitable for international projects. Unlike competitors such as Copyscape, it provides thorough detection and detailed reporting, helping content creators, educators, and researchers maintain originality and academic integrity. Its easy-to-use interface ensures that users can uphold the credibility of their work across various industries.

GPTZero offers an effective plagiarism detection tool that checks text against online sources to ensure originality. It provides a similarity score to help users gauge how much their content matches existing materials. While primarily aimed at writers, educators and students, it is not tailored for academic-level checks since it doesn’t scan institutional databases. However, it effectively detects AI-generated text and identifies potential plagiarism, making it a solid choice for maintaining content integrity and preventing copyright issues.

We wanted to see how well some plagiarism detection tools work, so we tested two of them: Originality.ai vs GPTZero. We took part in an article called “The State of AI in 2023: Generative AI’s breakout year.” 

Originality.ai Plagiarism Detection Capabilities

Originality.ai Plagiarism Detection Capabilities

GPTZero Plagiarism Detection Capabilities

GPTZero Plagiarism Detection Capabilities

Both Originality.ai and GPTZero do a great job of spotting plagiarism! Originality.ai goes the extra mile by providing a detailed report that includes 14 matched websites and specific phrase matches, making it super comprehensive. On the other hand, GPTZero detects a 23% similarity but doesn’t dive as deeply into the details. Overall, if you’re looking for thorough content verification, Originality.ai is a fantastic choice!

Integration with Other Tools

Originality.ai makes it easy to integrate with your existing tools. You can quickly check content with its Chrome extension or use the WordPress plugin for seamless integration with your website. It also offers a well-documented API, making it simple for businesses and developers to add AI and plagiarism detection directly into their workflows. If you’re part of a larger team, Originality.ai includes team management features to help control access and track content verification, making it a great choice for content creators, web publishers, and organizations.

On the other hand, GPTZero is designed with educators in mind. It integrates smoothly with popular learning management systems (LMS) like Moodle, Canvas, and Google Classroom. This makes it easy for teachers to detect AI-generated content within their classroom workflows. Additionally, GPTZero offers a Chrome extension for fast plagiarism and AI detection, plus Zapier integration, allowing you to automate tasks and connect with other tools for a more efficient content verification process.

Additional Features

Originality.ai goes above and beyond with tools designed to enhance content integrity. The Fact-checker ensures the accuracy of the information you’re publishing, while the Grammar Checker helps fine-tune your writing for clarity. The Readability Checker is perfect for evaluating how easy your content is to read. Plus, if you’re working with a large volume of content, the Site Scanner lets you scan entire websites for AI-generated text and plagiarism — ideal for publishers and businesses that need to verify multiple pieces at once.

GPTZero is packed with features tailored for academic use. The AI Vocabulary tool helps spot AI-generated terms in the text, while Writing Feedback provides suggestions for improving your writing. Essay Grader offers automated feedback on student essays, making it incredibly useful for educators. Additionally, Search Sources verifies references and detects unoriginal content, helping ensure that everything remains accurate and authentic.

Originality.ai vs GPTZero: Pros & Cons

Originality AI GPTZero
Pros ✅ 99% accuracy for AI detection (GPT-4, ChatGPT, Claude, Gemini, etc.).

✅ Excellent mixed content detection.

✅ Advanced plagiarism detection (90% accuracy).

✅ Multilingual support.

✅ Detailed shareable reports.

✅ Excellent for large-scale content verification with team management.

✅ 99% accuracy for detecting AI content (GPT-3, GPT-4, Claude, Gemini).

✅ Integrates with Google Classroom, Moodle, Canvas, and Zapier.

✅ Free plan available.

✅ Chrome extension for quick checks.

✅ Fast detection for AI-generated text, ideal for quick checks.

Cons ❌ No available Free Plan

❌ No LMS integration

❌ Limited multilingual support.

❌ Occasional false positives when detecting human-written text.

❌ Limited integration options for business or enterprise environments.

GPTZero vs Originality.ai: Pricing Comparison

Plan GPTZero Originality.AI
Free Plan ✅ $0/month

✅ 10,000 words/month

✅ Basic AI detection, 5 free advanced scans

❌ No free plan
Essential (GPTZero)/ Pro Plan (Originality.ai) ✅ $14.99/month

✅ 150,000 words/month

✅ AI Vocabulary Check, Chrome Extension

✅ $14.95/month

✅ 2,000 credits/month (1 credit = 100 words)

✅ Full site scans, Chrome extension

Premium Plan ✅ $23.99/month

✅ 300,000 words/month

✅ Advanced Scan, Writing Feedback, Plagiarism Check

❌ No direct equivalent
Professional (GPTZero)/ Enterprise Plan (Originality.ai) ✅ $45.99/month

✅ 500,000 words/month

10 million words overage, Page-by-page scanning

✅ $179/month

✅ 15,000 credits/month

API access, Priority support, 365 days scan history, Team management

Note: Pricing and features may change over time. For the latest information, please refer to the official websites of Originality AI and GPTZero. The pricing table above reflects monthly payment plans.

Originality AI Pricing Plans for Annual Payment

Originality AI Pricing Plans for Annual Payment

GPTZero Pricing Plans for Annual Payment

GPTZero Pricing Plans for Annual Payment

Which Factors to Consider When Choosing an AI Detection Tool?

  • Detection Accuracy: You want a tool that reliably detects AI-generated content, especially when working with complex models like GPT-4 and ChatGPT. Aim for tools that offer 99% accuracy to ensure solid, trustworthy results.
  • Plagiarism Detection: A great AI detection tool should also help you catch plagiarism. Look for features like paraphrasing detection and the ability to spot mosaic or patchwork plagiarism—these types can often slip past traditional tools.
  • Integration with Other Platforms: Check if the tool integrates with LMS platforms, content management systems, or automation tools for smoother workflows, especially in educational or business environments.
  • Multilingual Support: If you’re working with international content, ensure the tool supports multilingual AI detection, making it effective for texts in languages other than just English.
  • Pricing: Evaluate the pricing plans to find a balance between cost and features. Look for flexible plans, including free trials or usage-based pricing, that fit your budget and usage frequency.
  • Support and Customer Service: Ensure the tool offers responsive support, whether through live chat, email, or detailed documentation, to assist with any issues or questions.

Final Verdict

In the battle of GPTZero vs Originality.ai, GPTZero is ideal for quick, affordable AI detection, making it a great option for educators and small businesses. However, Originality.AI excels with its advanced plagiarism detection, offering 90% accuracy in identifying paraphrasing, patchwork, and mosaic plagiarism. It also shines in context detection, accurately identifying mixed content (AI-generated and human-edited text), making it the preferred choice for publishers, content creators, and SEO professionals who need thorough content analysis and multilingual support.

FAQs

1. Is GPTZero better than Originality AI?

No, Originality AI is more advanced in plagiarism detection and mixed content analysis, while GPTZero excels in quick, affordable AI detection.

2. Is GPTZero accurate as Turnitin?

No, GPTZero is effective for AI detection, but Turnitin is more accurate for plagiarism detection and has a broader database.

3. Is Originality AI accurate?

Yes, Originality AI offers 99% accuracy in AI detection and 90% accuracy in advanced plagiarism detection, including paraphrasing and mixed content.

Rating
5/5
Zoran Trimmel
Zoran Trimmel
Zoran Trimmel is an AI specialist who simplifies complex technical concepts. He evaluates emerging AI platforms for our technology website and produces insightful articles on AI and tech tools, thanks to his attention to detail and effective communication skills.
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