Best 153 AI Plagiarism Checker Tools in 2025

AI-based content detection
Verification of human or AI-generated content
Plagiarism detection
API integration for seamless implementation
LMS integration for easy usage within learning platforms
Gen AI Governance for preventing data leaks
AI Grader for efficient assessment of standardized tests

To use Copyleaks, simply create an account and log in. Depending on your needs, you can choose between different products such as AI Content Detector, Plagiarism Detector, Gen AI Governance, and AI Grader. These products provide features like detecting AI-generated content, verifying originality, preventing data leaks, and assessing standardized tests. Copyleaks offers options for API integration, LMS integration, and a Chrome extension for easy access and integration into existing workflows.

Smodin offers several core features to aid the writing process. These include: 1. Text Rewriter: Allows users to rewrite their text to improve clarity and originality. 2. Plagiarism Checker: Helps identify any instances of plagiarism in written content. 3. AI Writer: Generates high-quality, structured text complete with references. 4. Citation Machine: Automatically generates references in MLA and APA formats. 5. Multi-lingual Translator: Provides translation services for multiple languages to facilitate writing in different languages.

professional_plan $X per month

To use Smodin, sign up with a Google account or email address. Once logged in, users can access various tools such as the text rewriter, plagiarism checker, AI writer, citation machine, and translator. Simply input your text or document into the desired tool and follow the prompts to obtain the desired results. Smodin also offers an AI writing companion called CHATin, which allows users to generate content by asking questions and combines the power of Smodin, Google, and ChatGPT.

Originality.AI offers several core features that make it a powerful AI content checker and plagiarism detection tool: 1. Accurate AI Detection: Originality.AI has the most accurate AI content detection, with 99% accuracy for GPT-4 and 83% accuracy for ChatGPT. It can detect AI-generated content and distinguish it from human-written content. 2. Plagiarism Checking: The tool includes a best-in-class plagiarism checking feature, allowing you to identify if content has been copied from other sources. It can even detect paraphrase plagiarism when paraphrasing tools are used. 3. Readability Score: Originality.AI provides a readability score for your content, helping you understand its readability level. It uses reliable readability tests and target ranges that align with Google's requirements for content ranking. 4. Team Management: You can add and remove team members, manage their access levels, and track their activity. This feature is particularly useful for content marketing agencies and publishers. 5. Shareable Reports: You can easily share the results of AI detection, plagiarism checking, and readability scoring by generating shareable reports. This allows you to demonstrate the originality, quality, and compliance of your content. 6. AI Content Detector API: Originality.AI offers a well-documented API that allows you to integrate its AI content detection capabilities into your existing tools or workflow. These core features make Originality.AI a comprehensive content creation quality control tool, helping you protect your reputation and improve your content's originality and readability.

Using Originality.AI is simple and straightforward. Here's how you can use it: 1. Sign up on the Originality.AI website and create an account. 2. Choose a pricing plan that suits your needs. 3. Access the user dashboard and start using the AI content detection and plagiarism checking features. 4. To check content, either paste the text directly, upload a file, or provide a URL. 5. Originality.AI will analyze the content using its advanced AI algorithms and provide you with accurate results. 6. Check the detected AI content, plagiarism score, and readability score. 7. Use the Share Scan link to share the results or generate a detailed report. 8. Explore additional features like team management, API integration, and bulk site scan to enhance your content quality control process. With Originality.AI, you can ensure the originality and quality of your content with ease.

Bypass AI detection
Create undetectable AI content
Plagiarism-free rewrites
Completely error-free
High-ranking content
Authentic and creative content
Bypass spam filters

BypassGPT can create 100% undetectable AI text that mimics a human touch in three easy steps. Copy your original, AI-generated content into our portal. Click the button to start the BypassGPT process. Moments later, receive your rewritten text and use it however you like!

Fast text analysis
Accurate plagiarism detection
User-friendly interface

Copy and paste text for instant analysis

AI-powered content generation for various writing needs
40+ use cases and templates available
Support for 30+ languages and 20+ tones of voice
Scientific copywriting formulas, such as AIDA & PAS, for high-quality output
Powerful rich-text editor for easy customization and polishing
Built-in plagiarism checker to ensure content uniqueness
Extensive formatting options for aesthetically pleasing text
Seamless collaboration, team billing, and project management features
Browser extension for writing copy across different platforms
SEO analyzer to find optimal keywords and create well-written content
Responsive and mobile-friendly interface
Industry-leading customer support and community
Integration plugins for popular apps like WordPress and Shopify
API access for integrating Rytr into existing applications

free_plan Free Generate 10k characters per month
saver_plan $9 per month or $90 per year Generate 100k characters per month
unlimited_plan $29 per month or $290 per year Unlimited character generation per month

To use Rytr, simply choose a use case from over 40 options available. Then, provide some input or context to guide the AI. Rytr will generate the desired content within seconds. Users can customize the generated content further using the rich-text editor, which allows for rewording, shortening, and formatting options. Rytr also offers collaboration features, team billing, and project management tools to streamline the writing workflow. Users can access Rytr via its web platform or use the browser extension for more convenient copywriting on the go.

Humanizes AI-generated text
Bypasses AI detection tools
Multilingual support
No plagiarism guarantee
Optimized for SEO

To use Rewritify, simply paste your AI-generated text into the platform and click to transform it.

AI content detection
Plagiarism checker
Labeling feature
OCR technology

Free $0/month Up to 2,000 words scan
Essential $12/month Up to 80,000 words scan
Advanced $19/month Up to 200,000 words scan

1. Create your account for free to begin checking for AI content. 2. Enter the text you want to check for AI. 3. Get your results in seconds.

Transforms AI text into human-like writing
Bypasses AI detection systems
Supports 50+ languages
Ensures plagiarism-free content

Simply copy and paste your AI-generated content into the tool, click 'Humanize', and receive rewritten text that sounds natural and coherent.

DeepSearch™ technology for accurate plagiarism detection
Contextual analysis and word placement
Lightspeed recognition for fast results
Privacy protection
Comprehensive plagiarism score backed by billions of internet sources

Free Plagiarism checks on 500 words (1 page). ColorGrade™ feedback. Contextual analysis. Fuzzy matching. Conditional scoring
Premium $8.25 per month 100,000 words (200 pages) for plagiarism checks. DeepSearch™ Extended. Citation Assistant. Downloadable originality report. Custom URL exclusion. Interactive snippet text. Premium support

Quetext's plagiarism checker analyzes your text to identify plagiarism, resolve other writing issues, and build citations with ease.