Imagine spending hundreds of dollars on a blog or content only to find the tone feels robotic.
Could it be AI-generated? How can you be sure?
Well, there are different AI-detecting tools to understand whether content feels like AI or not. However, not all AI detectors are efficient.
So, what are the best AI content detectors?
We’ve reviewed a few detectors and found the best ones. For example, Originality.ai, GPTZero, Copyleaks, Quillbolt, or Grammarly are providing great results.
In this article, we'll extensively explore all the best AI Content detectors available right now.
8 Best AI Content Detectors
Here are the 8 best AI content detectors in 2025 you can use:
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Originality.ai
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Scribbr
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GPTZero
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ZeroGPT
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Copyleaks
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Quillbot AI Detector
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WordTune AI Detector
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Grammarly AI Detector
Now, we'll discuss all the AI detectors in detail with their features and pricing. So, keep reading.
1. Originality.Ai
Originality.AI is one of the best content detector tools created by Conor Watt and Jon Gillham. The tool is used to detect plagiarism, readability, AI, and others. For accuracy and consistency in their performance, Originality.AI is highly praised in the content writer community. It's highly suitable for content writers, content creators, or editors.
Features of Originality.Ai
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99% accuracy in detecting GPT-4. Claude 3 or ChatGPT.
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Checks and identifies the plagiarized and paraphrased content.
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Predicts the target readability score for search engines.
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Able to check facts on any information.
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Supports 15 different language options.
Pricing of Originality.Ai
Originality.AI has 3 primary pricing options. Those are:
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Pay As You Go: $30.00 (one-time payment)
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Pro: $14.95/month or $12.95/month (billed annually, save $24/year)
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Enterprise: $179.00/month or $136.58/month (billed annually)
Limitations of Originality.Ai
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Occasionally produces wrong or false results in detection.
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It has limited options in the pay-as-you-go payment option.
2. Scribbr AI Detector
Scribbr AI Detector is a free platform designed to prevent plagiarism and identify AI content. It's very helpful for mostly students, researchers, and marketers to maintain their strategy. Scribbr has scored 78% in detecting GPT-3.5 and GPT-4. Here are some fantastic features-
Features of Scribbr
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Detects plagiarized content with extreme precision.
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Identifies human and AI mixed content with 50% accuracy.
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Get suggested improvements of phrases or wordings for any AI-generated content.
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Allows you to input your content very quickly for analyses.
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Supports multiple languages like Spanish, German, or French.
Pricing of Scribbr
This platform is free to use. Nonetheless, it has a limitation of 1,200 words per submission.
Limitation of Scribbr
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Restricted word limit per session.
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Sometimes this website may generate wrong results or false positives.
3. GPTZero
GPTZero is another reliable AI content detector. It perfectly detects ChatGPT or GPT-4 generated contents. Students, content creators, general SEO, or general users can benefit from this platform.
Features of GPTZero
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Uses algorithms and deep learning methods to significantly detect
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User-friendly Access and easy to upload your content or document on the website.
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Offers a browser extension for quick and on-fly checking.
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Filters out the AI-generated content by improving the phrasings.
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Also able to check plagiarism.
Pricing of GPTZero
This platform offers 4 different plans. Those are -
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Free plan
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Essential: $8.33/month (billed annually) or $14.99/month
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Premium: $12.99/month (billed annually) or $23.99/month
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Professional: $24.99/month (billed annually) or $45.99/month
Limitations of GPTZero
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Sometimes, it can generate wrong answers.
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It may produce false positives.
4. ZeroGPT
ZeroGPT is another trustworthy AI content detector that identifies any text generated from GPT-4, Gemini, or any other language tools. It analyses the text with high accuracy from macro to micro level. The tool supports both text and file upload and is available in multiple languages.
Features of ZeroGPT
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98.8% accuracy in detecting any kind of ChatGPT or Gemini content.
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Upload PDF reports, URLs, or text files to analyze any AI plagiarism.
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Supports all the major languages.
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Includes tools for paraphrasing, grammar checking, or translation service.
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Allows you to upload multiple files at once.
Pricing of ZeroGPT
ZeroGpt offers 3 pricing plans for the users. Let’s check them out.
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Free plan
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Pro: $7.99/month (billed annually) or $9.99/month
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Max: $18.99/month (billed annually) or $26.99/month
Limitations of ZeroGPT
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Character limits for certain plans.
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It can't guarantee 100% accuracy.
5. Copyleaks
Copyleaks is a very well-known platform for identifying not only AI plagiarized text but also the source codes. For educators, business workers, or researchers, this tool is impeccable. They claim to have 99% accuracy in AI detection and a false positive result is 0.2%.
Features of Copyleaks
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Accurately detects AI from different models like ChatGPT, Bard, or Gemini.
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Extremely precise plagiarism checking option.
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Supports 30+ languages for global content detection.
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Provides detailed PDF reports or insights to show why something is AI.
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Offers LMS & API integration for business or educational purposes.
Pricing of Copyleaks
Copyleaks offers 4 pricing options for the users. Here they are:
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AI + Plagiarism Detection: $13.99/month (billed annually: $167.88) or $16.99/month
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Plagiarism Checker: $8.99/month (billed annually: $107.88) or $10.99/month
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AI Detector: $7.99/month (billed annually: $95.88) or $9.99/month
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Enterprise & LMS: Contact for pricing
Limitations of Copyleaks
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It may seem less cost-effective for some users.
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Even with high accuracy, sometimes the tool can flag human writing as AI content.
6. Quillbot AI Detector
In the world of AI detectors, Quillbot recently got a firm position with its extraordinary performance. It is one of the best AI tools. Aside from AI detection, the tool helps you to rephrase your sentences, reconstruct weak sentences, reduce the robotic tone of your content, and improve the quality. Quillbot is perfect for class assignments, research work, blog content, and work projects.
Features of Quillbot
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Scans your content with vast amounts of data and checks for plagiarism.
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Highlights your sentences where it seems like it was generated by AI tools.
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Ensures proper sentence structure and punctuation usage.
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Can easily paraphrase AI-detected sentences.
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Extremely user-friendly interface
Pricing of Quillbot
There are 3 pricing plans available. Let’s have a look at the plans.
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Monthly: $19.95/month
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Semi-Annual: $19.95/month (billed $119.70 every 6 months)
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Annual: $19.95/month (billed $239.40 annually)
Limitations
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Quillbot isn’t a fully-fledged AI detector. It only has 78% accuracy.
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It may give false positives sometimes.
7. WordTune AI Detector
WordTune AI Detector is another excellent option for detecting AI. It's highly efficient for anyone who's trying to avoid AI content and avoid penalties in search engines.
Features of WordTune
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AI Detection: This tool helps to identify if the text was machine-generated, like GPT3, GPT-4, or Gemini.
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Vocabulary Check: In content, it suggests better wording choices to avoid AI plagiarism.
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Grammar Check: Always check for punctuation, grammar, weak sentence structure, or spelling mistakes.
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Humanizing Content: After it detects the entire content, it humanizes the AI part in a more humanized or natural way.
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Immediate Result: You just copy and paste the content or upload any PDF files, and then immediately the tool will assess your content.
Pricing of WordTune
You can get 4 plans here. Those are-
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Basic: Free
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Advanced: $13.99/month or $6.99/month (billed annually)
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Unlimited: $19.99/month or $9.99/month (billed annually)
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Teams: $15.99/seat or $7.99/seat (billed annually)
Limitations of WordTune
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The free version isn’t for AI detection.
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It may give false positives.
8. Grammarly
Grammarly is one of the well-established grammar-checking and vocabulary-enhancing tools. Now, it has developed AI detection and has become popular very quickly. Let’s check out some major features of Grammarly.
Features of Grammarly
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Checks and corrects all common grammatical errors or spelling mistakes.
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Detects AI and provides AI suggestions to improve the content.
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Detects plagiarism and avoids penalties from Google.
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Gives suggestions to maintain the humanized and natural tone in the content.
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Offers you tons of different versatile wording choices for your content.
Pricing of Grammarly
Grammarly offers 3 pricing plans. Here are the pricing plans.
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Free plan
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Pro: $30/month or $12/month (Billed yearly)
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Enterprise: Contract Grammarly for more detail
Limitations of Grammarly
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The free version is quite restrictive.
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It often gives false positives.
How Does an AI Content Detector Work?
Mainly, AI content detectors use advanced machine learning algorithms to analyze patterns and phrasing in texts. Here is the breakdown of how it works:
1. Data Collection: At first, the AI detector tools collect vast amounts of data from both human and AI-generated resources.
2. Process Text: To analyze the user input easily, it cleans and processes the data with good unit and consistency.
3. Perplexity & Burstiness: The tools search for these two key features in any content. Perplexity is the predictable text, and Burstiness is the variation of sentences and vocabulary. Lower scores for both features mean AI content.
4. Machine Algorithm: The tool is then trained with a special algorithm with the processed data to learn and differentiate between human and AI-generated content.
5. Text Analyses: When a user inputs his file, the tool detects and processes through the training.
6. Prediction & Result: After the detection, it predicts and provides results as human or AI writing based on the tools’ learning pattern.
How to Humanize AI Content?
To transform your AI content into human-friendly content, please follow the given steps:
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Use your personal story, emotions, or experience that can't be created by a machine.
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Don't use complex sentences. To keep it engaging and readable, use very simple sentences and keep it minimal.
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Inject emotions and empathy in your content that can make your content more engaging. AI machines can't connect with the audience with emotion, feelings, or humor.
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You may use regional dialects or slang for a personal and unique touch. AI tools mainly have a very polished and refined approach.
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To make it more authentic and engaging, you'll have to avoid overly polished grammar, as humans tend to write with casual phrasing or often minor mistakes.
FAQs
How much percent of AI detection is acceptable?
The acceptable percentage of AI detection depends on the purpose. Academic content typically tolerates 5-10%, and creative content may allow 10-20%.
What does AI detection look for?
AI detection tools analyze text for patterns, predictable word choices, and formatting anomalies. These tools use statistical models to identify traits common in AI-generated content.
How accurate are AI detection tools?
AI detection tools offer 80-95% accuracy but are not foolproof. They can misidentify heavily edited AI content or human writing, so manual checks are necessary.
Final Verdict: Should You Use or Trust AI Content Detector?
Yes, you can use AI content detectors to check your content credibility. However, putting 100% faith in these tools will be wrong. Some AI detectors claim to have 99% accuracy like Originality.AI or Copyleaks. In comparison, others have 60-78%, depending on the tool quality.
These tools can offer you very thoughtful insights but can also produce false positives. Therefore, you can use them but don't solely rely on them for content authenticity. Best of luck!