10 Best AI Essay Detectors Ranked: Which One Is Accurate?

AI essay detectors are becoming essential for educators and content creators to identify AI-generated text. Here's a quick rundown of the top 10 tools and their features:

• EssayCheck.ai: High accuracy, detects subtle AI patterns, offers plans starting at $10/month.
• GPTZero: Focuses on AI detection but lacks detailed performance data.
• Turnitin: Known for academic integrity, now includes AI detection tools.
• Originality.ai: Claims 99%+ accuracy, supports multiple languages, pay-per-use pricing.
• Quillbot AI Detector: Specializes in identifying paraphrased content.
• Copyleaks AI Content Detector: Handles large volumes but struggles with heavily edited text.
• Scribbr AI Detection Tool: Focused on academic writing, frequently updated.
• Content at Scale AI Detector: Analyzes long-form content, prone to false positives.
• Writer.com AI Content Detector: Enterprise-focused with advanced features and security.
• Sapling AI Detector: Lacks detailed information, best used alongside manual review.

Quick Comparison

Tool	Accuracy	False Positive Rate	Special Features	Starting Price
EssayCheck.ai	High	Very low	Grammar check, plagiarism detection, essay grading	$10/month
Originality.ai	99%+ (Turbo)	Under 3% (Turbo)	Multi-language support, fact-checking	Pay-per-use
Turnitin	Moderate	Moderate	Integrated academic integrity tools	Varies
Quillbot AI Detector	Moderate	Moderate	Paraphrased content detection	Free
Copyleaks AI Detector	Moderate	Moderate	Handles large text volumes	Varies
Scribbr AI Detection Tool	Moderate	Moderate	Academic writing focus	Varies
Content at Scale	Moderate	High	Long-form content analysis	Varies
Writer.com	High	Low	Enterprise-grade, customizable	Varies
Sapling AI Detector	Unknown	Unknown	Limited information	Free

Which one should you choose?
For educators, EssayCheck.ai and Turnitin are great for academic use. Content creators may prefer Originality.ai for its precision and language support. Start with free plans or trials to find the best fit for your needs.

1. EssayCheck.ai

EssayCheck.ai offers a straightforward way to detect AI-generated content. Its AI content detector provides an instant percentage score, showing how likely the submitted text was created by AI.

The platform offers flexible monthly word limits:

• Free Plan: 1,000 words
• Basic Plan ($10/month): 30,000 words
• Pro Plan ($17/month): 100,000 words

What makes EssayCheck.ai stand out is its ability to identify subtle changes in writing style that often indicate AI involvement.

"Essay Check has become an indispensable tool in my classroom. It not only aids in detecting plagiarism but also identifies any AI-generated content seamlessly"

The tool is especially useful for educators looking to streamline grading and feedback. Mark Zellers, Director of Academic Programs, shares:

"Most of my time used to be spent manually grading essays, but now I can focus on helping students improve their writing skills"

Content creators also benefit from EssayCheck.ai, as it ensures their work stays original and maintains a human feel.

Using the tool is simple: paste your text, click "Detect AI Content", and get an instant percentage score. This quick process saves time while boosting confidence in the authenticity of your content.

2. GPTZero

GPTZero is a tool aimed at identifying content created by AI. While the specifics of its detection methods and accuracy aren't fully disclosed, its presence underscores its importance in the realm of AI content detection. Further evaluation is needed to better understand its capabilities.

3. Turnitin

Turnitin is widely known as a tool for upholding academic integrity, now equipped with AI detection features. It examines text patterns, language complexity, and context to identify possible AI-generated content, adapting its methods to meet the shifting demands of academia.

However, even advanced tools can face challenges when dealing with highly sophisticated AI-created or extensively edited text. To address this, Turnitin is constantly updating and refining its detection techniques as AI writing tools become more advanced.

What sets Turnitin apart is its integration of AI detection within a broader suite of academic integrity tools. It provides clear, easy-to-understand reports that help educators quickly assess the originality of submissions. This makes it a practical choice for maintaining academic standards.

4. Originality.ai

Originality.ai boasts a 99% accuracy rate in identifying AI-generated content from advanced models like GPT-4o, Claude 3, and ChatGPT. It provides three detection models tailored to different requirements and tolerance levels.

The Lite model achieves 98% accuracy with less than 1% false positives. The Turbo model pushes accuracy past 99%, keeping false positives under 3%, even when dealing with attempts to evade detection. One standout feature is its ability to spot paraphrased content using advanced NLP techniques, which contributes to its impressive precision.

"After extensive research and testing, we determined Originality.ai to be the most accurate technology", notes the Rock Content Team.

Key Features of Originality.ai

Feature	Description
AI Detection Models	Offers Lite, Turbo, and Multi Language models
Language Support	Detects AI content in 15 different languages
False Positive Management	Includes a Chrome extension to observe the writing process
Additional Tools	Features plagiarism detection, fact-checking, and readability scoring

The platform also includes fact-checking tools to verify information in real time, and a readability checker to ensure content aligns with search engine standards. These features make it particularly useful for identifying AI-generated essays while preserving content quality.

"In many cases, the tool tells the right story, even when it's nuanced, like in the case of AI content edited by humans", says Gael Breton, Founder of Authority Hacker.

Originality.ai excels at analyzing various forms of AI-generated text, from fully automated content to human-edited AI material. Its robust capabilities ensure reliable essay verification, paving the way for the next tool in our review.

5. Quillbot AI Detector

Quillbot's AI Detector is designed to spot text modified by paraphrasing tools. It highlights patterns that suggest AI involvement and provides a probability score for quick and clear insights.

This tool focuses on detecting paraphrased content, particularly when used to evade plagiarism checks. For the most accurate results, it's best to upload complete plain-text documents. However, content that's been heavily reworked might still require additional scrutiny.

In comparison with similar tools, Quillbot's AI Detector simplifies the process of identifying paraphrased material, making it a helpful resource for educators and reviewers assessing originality.

6. Copyleaks AI Content Detector

The Copyleaks AI Content Detector uses machine learning to spot AI-generated text, with a primary focus on academic essays and professional documents. It evaluates elements like writing patterns and syntax to determine the likelihood that the content was created by AI.

While it handles large volumes of text effectively, the tool faces challenges when dealing with heavily edited or paraphrased content. This highlights the difficulty of distinguishing polished human writing from AI-generated work. Copyleaks is continually updating its algorithms, but like other tools, it acknowledges that achieving 100% accuracy is not yet possible. Let’s move on to explore another AI detection tool for comparison.

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7. Scribbr AI Detection Tool

The Scribbr AI Detection Tool is designed to maintain academic integrity by examining aspects like sentence structure, vocabulary patterns, writing consistency, and context. Its goal is to spot text that might have been generated by AI in academic work.

As AI writing tools become more sophisticated, Scribbr updates its detection methods to keep pace. While the platform doesn't share exact performance data, its focus on academic writing trends highlights the ongoing need to refine AI detection strategies in response to evolving technology.

8. Content at Scale AI Detector

Content at Scale's AI detector evaluates text to identify whether it's written by a human or generated by AI. It focuses on analyzing text patterns to make this distinction and is particularly suited for longer pieces of writing.

While the tool's accuracy rates haven't been publicly shared, it does a solid job of spotting common AI writing patterns. It's especially useful for reviewing lengthy documents like academic essays or research papers. That said, it can sometimes flag human-written content as AI-generated, so false positives are a possibility.

To ensure accuracy, it's a good idea to double-check results using plagiarism tools and manual fact-checking.

Like other detectors, its performance depends on the type of content. It works well for standard academic writing, but highly technical material might need additional review to confirm its findings.

9. Writer.com AI Content Detector

Writer.com's AI Content Detector is designed with enterprise needs in mind, powered by advanced Palmyra LLMs. What sets it apart is its use of a Knowledge Graph rooted in company-specific data, ensuring better accuracy and reducing errors like hallucinations. Its AI guardrails framework adds extra layers of checks, covering areas like regulatory compliance, legal standards, inclusivity, and brand consistency.

The tool's performance has earned praise. Patrick Stokes, EVP of Product and Industries Marketing at Salesforce, shared:

"Writer provides a refined, AI-powered solution that's effective, easy to deploy, and has rapidly accelerated our workflows here at Salesforce"

Writer.com offers flexible integration options, including no-code solutions and API access, making it easy to implement across various scenarios, such as analyzing academic essays.

It also delivers cost savings, cutting expenses by 67% compared to older methods. Ranjan Roy, SVP of Strategy, highlighted:

"Writer doesn't follow trends that are happening in the industry, but actually creates products and infrastructure that lead the way"

Security is a priority, with strong measures in place to protect the confidentiality of all submitted content.

10. Sapling AI Detector

Sapling AI Detector helps identify AI-generated content, but there's not much verified information about how it works or how well it performs. Because of this, it's best to use its results alongside human review. Keep an eye out for updates that could provide more clarity or improvements. Up next, we'll compare features to see how these tools stack up.

Features Comparison

We've put together a comparison of key features from popular tools to help you decide which one suits your needs best. The table below showcases how EssayCheck.ai stacks up against Originality.ai and other detectors in terms of performance and functionality.

Feature	EssayCheck.ai	Originality.ai	Other Detectors
AI Detection Accuracy	High accuracy	99%+ (Turbo model)	Varies (70–95%)
False Positive Rate	Very low	Under 3% (Turbo)	5–15% (average)
Detection Method	Proprietary algorithm	Multiple models (Lite, Turbo, Multi-Language)	Limited coverage
Monthly Word Limit (Free)	1,000 words	Pay-per-use	Limited
Starting Price	$10/month	Usage-based	Varies
Additional Features	• Grammar check • Plagiarism detection • Essay grading	• Plagiarism check • Fact-checking • Team management	Basic detection

This breakdown highlights how these tools differ in their capabilities and user experience.

"After testing a number of AI content detection tools, I have found Originality.ai to be one of the best on the market."
– Glenn Gabe, SEO Consultant, GSQI.com

Key Highlights

1. Detection Accuracy
   Tools like Originality.ai lead the pack in accuracy, with some models achieving over 99% success rates. However, EssayCheck.ai also delivers highly reliable results, making it a strong contender.
2. Integrated Features
   EssayCheck.ai stands out for offering more than just AI detection. Its suite includes grammar checks, plagiarism detection, and essay grading, making it a versatile choice.
3. Pricing and Accessibility
   With a starting price of $10/month for 30,000 words, EssayCheck.ai provides a straightforward pricing model, while others may charge on a pay-per-use basis or have varying costs.
4. Language Support
   Advanced detection capabilities across multiple languages make these tools useful in diverse contexts, particularly for global users.

Why It Matters

The ability to detect paraphrased AI content has become increasingly important, especially in academic environments where maintaining integrity is a top priority. Tools like EssayCheck.ai are proving to be invaluable in this area.

"EssayCheck has become an indispensable tool in my classroom. It not only aids in detecting plagiarism but also identifies any AI-generated content seamlessly."
– Daniel T., High School Teacher

Summary and Recommendations

Here’s what our tests suggest:

For Educational Institutions

EssayCheck.ai offers a range of tools tailored for academic use. Its features make it easier to evaluate work in educational settings, helping streamline checks for originality and AI-generated content.

For Content Publishers and Agencies

"I use this tool most frequently to check for AI content personally"

Budget Options

Here’s a quick look at the available plans:

• Free: Covers up to 1,000 words per month
• Basic: $10/month for 30,000 words
• Pro: $17/month for 100,000 words

These plans provide flexibility depending on your needs and the volume of content you handle.

Key Factors to Consider

When choosing a detection tool, keep these in mind:

• Detection Accuracy: How reliably the tool identifies AI-generated content.
• Feature Integration: The range of tools included for seamless use.
• Usage Volume: Whether the plan matches your content needs.
• Support Quality: Availability and responsiveness of customer support.

"Originality.ai did a fantastic job on all three prompts, precisely detecting them as AI-written"

Industry Feedback

Experts emphasize the importance of these factors. As technology advances, the capabilities of AI detection tools continue to improve.

If you’re curious about EssayCheck.ai, start with the free plan to see how it works for you.