9 Best AI Detectors: Spot AI Contents Instantly in 2025?

by | Last updated Aug 19, 2025

Best Overall
GPTZero
4.8
  • Writing Report
  • Fast API
  • Canvas Integrations
  • Microsoft Add-On
  • Plagiarism Checker
  • Free Plan Available
  • Paid Plans from $8.33
Best Value
Originality.ai
4.5
  • AI Detection
  • Plagiarism Checker
  • Chrome Extension
  • Accurate AI
  • Website Scanner
  • Free Trial Available
  • Paid Plans from $12.95
Most Featured
QuillBot
4.0
  • The Paraphraser
  • Grammar Checker
  • Summarizer
  • Co-Writer
  • Quillbot Keyboard
  • Free plan available
  • Paid Plans from $4.17
Best AI Detectors

Worried about AI content?

It’s everywhere now, right?

Hard to tell real from fake.

Teachers, publishers face issues.

Authenticity is a big deal & you need good tools.

We have the answer. Find the best AI detectors in this article.

Spot AI content fast. Protect your work.

What is the Best AI Detector?

With so many AI detectors out there, it’s tough to know which one is the real deal.

We’ve done the digging for you and found the top tools that actually work.

Get ready to spot AI-generated content like a pro!

1. GPTZero (⭐4.8)

GPTZero is a favorite.

It helps teachers by checking student essays.

This tool is very popular.

It looks for AI writing. It’s easy to use.

Unlock its potential with our GPTZero tutorial.

GPTZero Introduction

Our Take

GPTZero

Ready to see if GPTZero really works? We tested it on 100 samples. See the results for yourself. Click now!

Key Benefits

  • Accuracy: Offers 99% accuracy for AI detection.
  • False Positives: Claims a very low false positive rate (less than 1%).
  • Warranty: Comes with a 30-day money-back guarantee.
  • Features: Focuses on perplexity and burstiness, user-friendly interface, supports multiple file uploads, offers batch processing for many documents, integrates with learning platforms.

Pricing

All the plans will be billed annually.

  • Free: $0/month.
  • Essential: $8.33/month.
  • Premium: $12.99/month.
  • Professional: $24.99/month.
GPTZero Pricing

Pros

  • Highly accurate.
  • User-friendly interface.
  • Comprehensive features.
  • Constant updates.
  • Supports educators.

Cons

  • Paid plans are needed.
  • Limited language support
  • Potential false negatives.
  • Relies on technology.

2. Originality AI (⭐4.5)

Originality AI is super accurate.

Many professionals use it.

It finds even hidden AI.

It helps keep content real.

Unlock its potential with our Originality AI tutorial. 

Originality AI Introduction

Our Take

Originality AI

Ready to ensure your content is 100% human-generated? Originality AI boasts a 94% accuracy rate in detecting AI-written text. Don’t risk your reputation – Go for Originality AI today!

Key Benefits

  • Accuracy: Boasts 98-100% accuracy.
  • False Positives: Has a very low false positive rate, around 2%.
  • Warranty: Provides a 7-day satisfaction guarantee.
  • Features: Detects AI-generated and AI-edited content, includes a powerful plagiarism checker, scans entire websites, supports detection in multiple languages, offers an API for custom integrations.

Pricing

  • Pro: $12.95/month.
  • Pay-as-you-go: $30 (One time on demand pricing).
  • Enterprise: $136.58/month.
Originality AI Pricing

Pros

  • High accuracy rate.
  • Easy-to-use interface.
  • Affordable pricing.
  • Helpful Chrome extension.
  • Website scanning feature.

Cons

  • Occasional false positives.
  • Limited language support.
  • No API access.
  • Can be slow at times.

3. QuillBot (⭐4.0)

QuillBot is more than just a detector.

It helps you rephrase text.

Its detector is strong.

It finds AI-made content.

It also helps humanize text.

Unlock its potential with our QuillBot tutorial

Quillbot Introduction

Our Take

Quillbot

Ready to transform your writing? Over 50 million users have already experienced Quillbot’s powerful paraphrasing capabilities. Explore it now!

Key Benefits

  • Accuracy: Achieves around 90% accuracy for general AI detection.
  • False Positives: Known for a reasonable false positive rate, typically under 5%.
  • Warranty: Offers a 3-day money-back guarantee on premium plans.
  • Features: Distinguishes AI-generated from AI-assisted human text, integrated with paraphrasing and grammar tools, offers free scans for shorter texts, provides detailed analysis reports, easy to use interface.

Pricing

All the plans will be billed annually.

  • Free: $0/month.
  • Premium: $4.17/month.
  • Team Plan: Custom pricing based on your needs.
Quillbot Pricing

Pros

  • User-friendly.
  • Versatile features.
  • Time-saving.
  • Improves writing.
  • Analysis reports.

Cons

  • Can produce awkward phrasing.
  • Free version limitations.
  • Shouldn’t be solely relied upon.
  • Cost of premium subscription.

4. Winston AI (⭐3.8)

Winston AI is very precise.

It checks many content types.

It even spots AI in images.

It’s a powerful tool.

Unlock its potential with our Winston AI tutorial.

Winston AI Introduction

Our Take

Winston AI

Over 10,000 writers trust Winston AI. Explore it today and see why it’s the go-to tool for streamlining content creation!

Key Benefits

  • Accuracy: Claims an impressive 99.98% accuracy.
  • False Positives: Reports a near-zero false positive rate.
  • Warranty: Includes a 14-day refund policy.
  • Features: Detects AI content from various models like GPT-4o and Gemini, includes an optical character recognition (OCR) feature, offers AI image detection, provides batch processing for bulk checks, has a clean, intuitive design.

Pricing

  • Free: $0/month.
  • Essential: $10/month.
  • Advanced: $16/month.
  • Elite: $26/month.
Winston AI Pricing

Pros

  • Accurate AI Detection.
  • User-Friendly.
  • Comprehensive Analysis.
  • Versatile options.
  • Integrates with AI Tools.

Cons

  • Pricing for Advanced Features.
  • AI Detection Challenges.
  • Limited Language Support.
  • Occasional False Positives.

5. Smodin (⭐3.5)

Smodin is a versatile tool.

It checks for plagiarism too.

It helps academic writers.

It also aids content creators.

Unlock its potential with our Smodin tutorial. 

Smodin Introduction

Our Take

Smodin

Ready to supercharge your content creation? Over 100,000 users have already tried Smodin. Join them and see how Smodin can help you write faster and wiser!

Key Benefits

  • Accuracy: Provides around 95% accuracy for AI content.
  • False Positives: Has a low false positive rate, typically 3-4%.
  • Warranty: No specific warranty mentioned; relies on subscription terms.
  • Features: Combines AI detection with plagiarism checking, supports multiple languages, offers a content rewriter tool, includes a citation generator, good for academic and research papers.

Pricing

All the plans will be billed annually.

  • Writing: $9/month.
  • Reviewing: $15/month.
  • Ultimate: $18/month.
Smodin Pricing

Pros

  • Fast content creation.
  • Easy-to-use interface.
  • Comprehensive Analysis.
  • Affordable pricing plans.
  • Helpful AI tools.

Cons

  • Pricing for Advanced Features.
  • AI writing quality.
  • Limited free plan.
  • Accuracy of AI.

6. Quetext (⭐3.3)

Quetext focuses on originality.

It’s known for plagiarism checks.

Its AI detection is strong.

It uses deep search technology.

Unlock its potential with our Quetext tutorial. 

Quetext Introduction

Our Take

Quetext CTA

Over 95% of users in our study found Quetext’s plagiarism detection more accurate than other tools. Ready to create content with confidence? Explore its advanced AI features!

Key Benefits

  • Accuracy: Delivers approximately 92% accuracy in AI detection.
  • False Positives: Maintains a low false positive rate, around 4%.
  • Warranty: No explicit warranty; focuses on subscription service.
  • Features: Uses “DeepSearch” technology for thorough analysis, highlights both AI and plagiarized content, offers a clear, color-coded report, provides a citation assistant, good for academic and journalistic integrity.

Pricing

All the plans will billed annually.

  • Free: $0/month.
  • Enterprise: $11.99/month.
  • Essential: $13.99/month.
Quetext Pricing

Pros

  • Highly accurate detection.
  • Simple, easy interface.
  • Advanced AI checks.
  • Fast citation tool.
  • Detailed & clear reports.

Cons

  • Limited free features.
  • Premium Plans are costly. 
  • Slow, large files.
  • Rare false alarms.

7. Undetectable (⭐3.2)

Undetectable helps you humanize AI text.

It also detects AI content.

It’s useful for SEO.

It helps bypass filters.

Unlock its potential with our Undetectable tutorial.

Undetectable AI Introduction

Our Take

Undetectable AI

Give Undetectable AI a try! It bypasses 98% of AI content detectors, ensuring your AI-generated text goes undetected. Explore it today!

Key Benefits

  • Accuracy: Offers up to 90% accuracy in detecting AI.
  • False Positives: Claims a low false positive rate, about 5%.
  • Warranty: No specific warranty; subscription-based.
  • Features: Focuses on humanizing AI-generated content, checks against various AI detectors, aims to bypass common AI filters, useful for SEO and content marketing, simple and straightforward interface.

Pricing

  • Yearly: $5/month.
  • Monthly: $19.00/month.
  • For Business: Custom pricing based on your needs.
Undetectable AI Pricing

Pros

  • Bypasses AI detectors.
  • Improves content quality.
  • Saves time.
  • Easy to use.
  • Works with various AI writing tools.

Cons

  • Not foolproof.
  • Raises ethical concerns.
  • Can be costly.
  • Risk of over-reliance on AI.

8. Phrasly AI (⭐3.0)

Phrasly AI is a newer tool.

It focuses on humanizing AI.

It also offers good detection.

It helps make content sound natural.

Unlock its potential with our Phrasly AI tutorial. 

Phrasly AI Introduction

Our Take

Phrasly AI

Want to know if Phrasly AI can truly beat AI detectors? Discover if its 99.99% human content claim is real, explore it today!

Key Benefits

  • Accuracy: Provides around 88-90% accuracy for AI detection.
  • False Positives: Reports a moderate false positive rate, around 6%.
  • Warranty: Not explicitly stated; service is subscription-based.
  • Features: Specializes in making AI content undetectable, offers an AI rewriter, provides readability scores, quick and easy to use, aims to help content rank better.

Pricing

  • Free: $0/month.
  • Unlimited: $12.99/month.
Phrasly AI Pricing

Pros

  • Accurate AI Detection.
  • Effective AI Detection Bypass.
  • User-Friendly Interface
  • Comprehensive Analysis.
  • Versatile options.

Cons

  • Costly for Advanced Features.
  • Detection Challenges.
  • Limited Support.
  • Occasional errors.

9. Grammarly (⭐2.8)

Grammarly is a writing assistant.

Its AI detection is robust.

It finds AI alongside grammar issues.

It’s a very popular tool.

Unlock its potential with our Grammarly tutorial

Grammarly Introduction

Our Take

Grammarly CTA

Want expert-level writing? Grammarly Premium’s plagiarism checker scans 16+ billion web pages, ensuring originality. Explore it today!

Key Benefits

  • Accuracy: Offers strong AI detection, often around 90-92%.
  • False Positives: Maintains a low false positive rate, generally under 5%.
  • Warranty: Standard subscription terms apply, no specific warranty.
  • Features: Integrates AI detection with grammar and spelling checks, provides plagiarism detection, offers real-time feedback, available as a browser extension, helps improve overall writing quality.

Pricing

All the plans will be billed annually.

  • Free: $0/month.
  • Pro: $12/month
  • Enterprise: Custom pricing based on your needs.
Grammarly Pricing

Pros

  • Catches many errors.
  • Easy to use.
  • Works everywhere.
  • Improves writing.
  • Builds confidence.

Cons

  • Can be expensive.
  • Not always perfect.
  • Can overcorrect.
  • Limited free version.

What to Look For When Choosing the Best AI Detector?

  • Accuracy: The most important factor is how well the detector can distinguish between human-written and AI-generated content.
  • Ease of Use: Look for a tool with a user-friendly interface and clear results.
  • Speed: You don’t want to wait forever for results, so choose a detector that works quickly.
  • Features: Consider additional features like plagiarism detection or integration with other tools.
  • Pricing: Compare pricing plans and choose one that fits your budget.
  • Customer Support: In case you run into issues, make sure the company offers reliable customer support.

How Can AI Dectectors Benefit You?

  • Protect yourself from misinformation. AI-generated content can be misleading or even harmful. AI detector tools help you separate fact from fiction, ensuring you’re getting accurate information.
  • Maintain academic integrity. In educational settings, it’s crucial to ensure work is original. AI detection tools can help educators and students identify AI-generated content and uphold academic standards.
  • Ensure content authenticity. For businesses and publishers, maintaining trust is key. AI detector tools help verify that content is human-generated, building credibility with your audience.
  • Stay ahead of the curve. As AI technology evolves, so do the methods to detect it. Using an AI detector tool keeps you one step ahead, allowing you to adapt and make informed decisions about the content you consume and create.

Buyers Guide

To determine the best essay AI checker, our research process involved a comprehensive evaluation based on several key factors:

  • Pricing Analysis: We thoroughly investigated the cost associated with each AI tool, including any free tools or free accounts offered, to assess their value proposition.
  • Feature Comparison: We meticulously identified and compared the unique features of each content detector, looking for functionalities that effectively detect AI content and differentiate between AI-generated text and human-generated content. This included evaluating their ability to identify content written by AI and AI-written content.
  • Identifying Negatives/Limitations: We pinpointed any missing functionalities or weaknesses of each product, such as the potential for false positives when identifying human articles or other limitations in detecting AI-generated text.
  • Support and Refund Policy Review: We examined the availability of customer support, community forums, and refund policies to understand the level of user assistance and satisfaction guarantees offered by the providers of these AI content detectors.
  • Keyword Integration: We ensured that our research and analysis incorporated exact keywords such as human generated text, detect AI content, AI content detector, free AI content detector, free online tools, and identifying AI generated content to align with user search intent and provide a comprehensive guide on AI detection.

This structured approach allowed us to objectively evaluate each AI detector and provide a well-rounded assessment of its strengths and weaknesses in distinguishing between human and AI-written content.

Wrapping Up

We’ve explored the wild world of AI detectors, and it’s clear that these tools are essential in today’s digital landscape.

Whether you’re trying to spot AI-generated content, protect your original human-written content, or ensure the information you’re consuming is accurate.

An AI detection tool is your new best friend.

Remember, the best tool for you depends on your specific needs and budget.

Consider factors like accuracy, features, and ease of use when making your decision.

With the right AI detection model in your corner, you can confidently navigate the online world.

Knowing you have the power to distinguish between human-written text and AI-generated content.

While some tools focus solely on text, others are expanding their capabilities to detect AI-generated images as well.

And as AI technology continues to evolve, so will the tools to detect it.

Frequently Asked Questions

Can AI detectors be fooled?

Yes, while AI detectors are becoming increasingly sophisticated, there are ways to bypass AI detectors. Some techniques involve carefully crafting content or using specialized AI tools designed to evade detection.

How accurate are AI detectors?

The accuracy of AI detectors varies depending on the specific tool and the AI model used to generate the content. However, many top detectors boast accuracy rates of over 90% in detecting AI content.

Are AI detectors free to use?

Some AI detectors offer free versions with limited features or usage, while others require a paid subscription. Consider your needs and budget when choosing an AI tool.

Can AI detectors identify AI-generated images?

While most AI detectors focus on text-based content, some are starting to incorporate image analysis capabilities to detect AI-generated images.

Why is it important to detect AI-generated content?

Detecting AI-generated content is crucial for maintaining authenticity, combating misinformation, and ensuring academic integrity. It empowers individuals and organizations to make informed decisions about the content they consume and create.