7 Best AI Content Detector Tools That Are Free in 2024

Explore the top 7 free AI writing detection tools of 2024. Enhance your content's authenticity with leading technology to identify and humanize AI-generated text

Did you know that nearly 60% of all online content is now influenced by AI in some form? As artificial intelligence continues to weave its intricate web across the digital landscape, distinguishing between human and AI-generated text becomes not just a curiosity, but a necessity. 

Whether you’re a content creator striving for authenticity, an educator upholding academic integrity, or a marketer navigating the complexities of SEO, the ability to detect AI-crafted text is crucial. This is where the Phrasly AI detection tool comes into play along with other tools, offering a beacon of clarity in a sea of automated prose. 

Remember: Phrasly is the only tool that offers unlimited words for detection and humanizing; no other tool offers this service. 

Top 7 Free Tools for Detecting AI Writing

In the following guide, I’ll help you find the top free tools designed to detect AI writing, ensuring your content remains genuinely human and uniquely yours.

7 Best Tools For Detecting AI Writing

  1. Phrasly: Overall Best AI Detector And Humanizer
  2. Undetectable AI: Good for Detecting AI Content
  3. GPTZero: Works Good for Chatgpt Content
  4. ZeroGPT: Your Digital Authenticity Advocate
  5. ContentAtScale: The Plagiarism and AI Detector
  6. Copyleaks: Detects Copied and AI Writing
  7. StealthGPT: Sneaky AI Detection

Quick Comparison Table For the Best AI Content Detector Tools 

Feature/ToolPhrasly (Recommended)Undetectable AIGPT ZeroZeroGPTContent At ScaleHuman Auto Typer, API-compatible
PricingFree Trial, $10.99/mo after trial$14.99/mo or $5.00/mo yearly$15/mo Essential, $24/mo PremiumFree, Pro $9.99/mo, Max $26.99/mo$15 for a post, $249/mo after trialAI Detection $9.99/mo, Plagiarism $10.99/moEssential $19.99/mo, Pro $29.99/mo
Words Limit550 words trial, Unlimited Words after upgrade15,000 words/mo monthly, 10,000 yearly150,000 – 500,000 words per month1,500 – 10,000 words per feature25k words for rewritesUp to 100 creditsUp to 1,000,000 words per month
AI Detection100% BypassPasses AI detectorsPremium AI detection modelsAI detection up to 100,000 charactersNot specified99% accuracyBeats major AI detectors
FeaturesHumanizer, Grammar Checker, Multi-Lingual, Co-WriterCustom plans for high-volumePlagiarism Scanning, Writing FeedbackAI Summarizer, Grammar CheckSEO optimized contentPlagiarism and paraphrasing detectionEnhanced Coherency, Business Tools
Special Offer45% off annual plans50% off yearlySave 33% on annual plansDiscount on Pro and Max plansAI detection of up to 100,000 characters20% off best value planDiscounts on annual and business plans

This table gives a brief overview focusing on pricing and the main features of each tool. Remember, Prices can change over time, for detailed and current pricing, always refer to the respective tool’s official website.

1. Phrasly: Overall Best AI Detector And Humanizer

7 Best AI Content Detector Tools That Are Free in 2024

Phrasly stands out as the go-to tool for ensuring your writing maintains a genuine, human touch. Designed to identify and correct segments of text that may betray AI involvement, Phrasly is an essential companion for writers, educators, and content creators aiming for authenticity in their work. 

Beyond mere detection, it offers practical suggestions to enhance the human quality of your text, making it resonate more with real-life readers. Its intuitive interface simplifies the often-complex process of differentiating between human and AI writing, catering to users of all skill levels. 

Whether you’re polishing an article, refining an essay, or ensuring your creative work retains its human essence, Phrasly equips you with the tools to infuse your writing with undeniable authenticity. Its adeptness at both identifying AI-generated content and guiding users in humanizing their text makes it the top recommendation for anyone looking to preserve the human element in their writing endeavors.


  • Excellent at identifying AI writing.
  • Helps make writing sound more human.
  • Easy to use interface.
  • Offers tips to improve writing style.


  • May require some learning.
  • Advanced features might be overwhelming for beginners.

2. Undetectable AI: Good for Detecting AI Content

Undetectable AI is specifically crafted to uncover the AI footprint within text content. It utilizes advanced algorithms to scan texts, identifying patterns and anomalies that typically signify AI involvement. 

Ideal for bloggers, marketers, and academic professionals who prioritize content authenticity, this tool streamlines the process of ensuring written material retains a genuine, human-produced quality. Its focus on simplicity and accuracy makes it a valuable asset for anyone concerned with the integrity of their written work.


  • Great at spotting AI-written content.
  • Quick results.
  • User-friendly for beginners.
  • Helps understand AI writing patterns.


  • Might not catch very subtle AI writing.
  • Focused mainly on detection, and less on correction.

3. GPTZero: Works Good for ChatGPT Content

GPTZero specializes in detecting content generated by specific AI models like ChatGPT. Its precision in distinguishing between human and machine-generated text makes it a crucial tool for educators, students, and content creators who strive for originality in their writings. 

GPTZero provides a straightforward, user-friendly platform that demystifies the process of AI content detection, offering peace of mind in an era where digital authenticity is paramount.


  • Specifically designed for ChatGPT content.
  • Provides detailed analysis.
  • Easy to use for all ages.
  • Free educational resource.


  • Mainly useful for detecting ChatGPT outputs.
  • Limited functionality beyond ChatGPT detection.

4. ZeroGPT: Your Digital Authenticity Advocate

ZeroGPT emerges as a reliable ally in the fight against AI-induced homogeneity in written content. With its keen ability to sift through text and identify AI-generated material, ZeroGPT is perfect for individuals looking to maintain the uniqueness and authenticity of their writings. Its development reflects a commitment to enhancing digital honesty, providing users with a simple yet effective means of preserving the human essence in their work across various digital platforms.


  • Efficient at identifying AI involvement.
  • Straightforward interface.
  • Constantly updating with new features.
  • Promotes authentic writing practices.


  • Being new, may still be improving its accuracy.
  • Less known compared to other tools.

5. ContentAtScale: The Plagiarism and AI Detector

ContentAtScale offers a unique dual-purpose solution, integrating AI detection with content enhancement capabilities. This platform serves as a virtual assistant, guiding users through the process of refining their writing while ensuring it remains free of AI-generated content. It’s particularly suited for content marketers and writers who seek to elevate their work’s quality without sacrificing authenticity. 

ContentAtScale stands out by providing comprehensive support, from identifying AI involvement to offering actionable insights for content improvement.


  • Dual functionality: AI detection and content improvement.
  • In-depth analysis of writing.
  • User-friendly for content creators.
  • Offers insights on how to humanize AI-generated content.


  • May have a steeper learning curve due to its features.
  • Features might be too comprehensive for casual users.

6. Copyleaks: Detects Copied Writing

Copyleaks presents itself as a formidable tool for plagiarism detection, with a keen aptitude for uncovering AI-generated content. It caters to academics, authors, and content managers who demand the highest standards of originality in written material. 

By leveraging sophisticated technology, Copyleaks offers a robust solution for validating the authenticity of text, ensuring that content is not only plagiarism-free but also maintains the irreplaceable value of human creativity.


  • Highly effective at identifying copied content.
  • Supports multiple languages.
  • Easy integration with other platforms.
  • Comprehensive report generation.


  • More focused on plagiarism than AI detection.
  • Advanced features require a subscription.

7. StealthGPT: Sneaky AI Detection

StealthGPT stands at the forefront of AI detection technology, offering users an advanced mechanism to identify and differentiate AI-generated text from human writing. This tool is engineered for precision and ease, making it an ideal choice for content creators, SEO specialists, and educators keen on preserving the integrity of their written content. 

StealthGPT’s innovative approach to detecting subtle signs of AI involvement helps maintain a level of authenticity and originality in digital content that is increasingly rare.


  • Good at finding AI writing.
  • Easy for everyone to use.
  • Gives fast results.
  • Works for many kinds of writing.


  • Still new and improving.
  • Might not explain much about its decisions.

Why Phrasly is the Best AI Content Detector and Humanizer

Top 7 Free Tools for Detecting AI Writing

Phrasly stands out as a game-changer for professors, blog writers, students, and professionals alike, revolutionizing the way AI-generated content is perceived and utilized. With Phrasly, you can transform AI-generated drafts into pieces that effortlessly pass as human-created, ensuring your work is always original and authentic.

Phrasly’s dashboard is user-friendly, offering options from easy to aggressive humanization strengths, allowing for customization according to your specific needs. Its Pro Engine supports up to 800 words in a single go, making it efficient for larger projects.

Moreover, Phrasly’s commitment to authenticity is unmatched. If it ever generates content that’s detected by AI detectors, they offer an instant refund, highlighting their confidence in the service’s effectiveness. Whether you’re battling writer’s block or looking to elevate your content quality, Phrasly’s Co-Writer feature and comprehensive support make content creation seamless and worry-free.

Choosing Phrasly means gaining access to a suite of powerful tools designed to keep your content at the forefront of originality and quality, all while saving time and enhancing your writing capabilities. It’s not just recommended; it’s essential for anyone looking to maintain the integrity and authenticity of their content in the digital age.

Try Phrasly For Free To Detect AI Content

Among all the best AI content detector tools we’ve talked about, Phrasly shines the brightest. It’s not just another tool; it’s like having a smart friend who helps make sure your writing sounds like it was done by a real person, not a computer. Phrasly is the best because it’s easy to use, gives fast help, and really understands how to make writing feel genuine and full of life. This is why it comes highly recommended. 

If you’re looking for one tool to help keep your writing true and original, Phrasly is the way to go. It stands out from the rest by making sure your work stays unique and personal, just like it should be.