Is your current plagiarism checker too costly?
Does it miss the newest types of AI-generated content?
That is a real problem today for students, teachers, and writers.
You need a reliable tool to keep your work honest.
The good news is that there are many out there.
We will show you the 9 best Copyleaks Alternatives for 2025.
This list includes both free and paid checkers.
You will find the perfect plagiarism checker that meets all your needs.
What is the Best Copyleaks Alternative?
You need a new tool that is both strong at detecting plagiarism and at spotting AI-generated writing.
Finding the right checker is key to keeping your work honest.
Don’t worry about wasting time and money.
We have checked all the top options for you.
The list below breaks down the nine best programs you can start using today.
1. GPTZero (⭐4.8)
This is a top tool for checking if text is AI-written.
It is super accurate. Teachers and writers really trust it.
It shows you the text’s originality score.
Vantaggi principali
- 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.
Prezzi
All the plans will be billed annually.
- Free: $0/month.
- Essential: $8.33/month.
- Premium: $12.99/month.
- Professional: $24.99/month.
Professionisti
Contro
2. Originality AI (⭐4.5)
Do you need to check for both AI writing and copied text?
This tool does both very well. It is popular with bloggers and businesses.
It gives you a fast and clear report.
La nostra opinione
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!
Vantaggi principali
- 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.
Prezzi
- Pro: $12.95/month.
- Pay-as-you-go: $30 (One time on demand pricing).
- Enterprise: $136.58/month.
Professionisti
Contro
3. QuillBot (⭐4.0)
Most people know QuillBot for paraphrasing.
But it also has a good plagiarism checker.
It is simple to use and finds standard copied text easily.
It is a solid choice for students.
La nostra opinione
Ready to transform your writing? Over 50 million users have already experienced Quillbot’s powerful paraphrasing capabilities. Explore it now!
Vantaggi principali
- 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.
Prezzi
All the plans will be billed annually.
- Free: $0/month.
- Premium: $4.17/month.
- Team Plan: Custom pricing based on your needs.
Professionisti
Contro
4. Winston (⭐3.8)
Winston is a great AI detection tool.
It focuses on finding AI content with high accuracy.
It also has an AI image detector. It’s a nice all-in-one check for content creators.
Vantaggi principali
- 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.
Prezzi
- Free: $0/month.
- Essential: $10/month.
- Advanced: $16/month.
- Elite: $26/month.
Professionisti
Contro
5. Phrasly AI (⭐3.5)
This tool is made to “humanize” AI-written text.
It also has an AI detector built right in.
It helps you make sure your content sounds natural. You can use it to avoid AI flags.
Vantaggi principali
- 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.
Prezzi
- Free: $0/month.
- Unlimited: $12.99/month.
Professionisti
Contro
6. Quetext (⭐3.3)
Quetext uses something called DeepSearch™ Technology.
This helps it find more complex matches. It goes beyond simple word checks.
The color-coded reports are easy to read.
Vantaggi principali
- 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.
Prezzi
All the plans will billed annually.
- Free: $0/month.
- Enterprise: $11.99/month.
- Essential: $13.99/month.
Professionisti
Contro
7. Undetectable (⭐3.2)
The name says it all, right?
This tool tries to make AI text pass human checks.
It is primarily a content rewriter.
It is a good choice if your main goal is to bypass detectors.
La nostra opinione
Give Undetectable AI a try! It bypasses 98% of AI content detectors, ensuring your AI-generated text goes undetected. Explore it today!
Vantaggi principali
- 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.
Prezzi
- Yearly: $5/month.
- Monthly: $19.00/month.
- For Business: Custom pricing based on your needs.
Professionisti
Contro
8. Smodin (⭐3.0)
Smodin is a large writing platform.
It has an AI writer and a plagiarism checker.
It checks your text against many sources.
It’s a multi-tool for many writing needs.
Vantaggi principali
- 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.
Prezzi
All the plans will be billed annually.
- Writing: $9/month.
- Reviewing: $15/month.
- Ultimate: $18/month.
Professionisti
Contro
9. Grammarly (⭐2.8)
Grammarly is famous for fixing grammar.
The Premium version also has a plagiarism check.
It is very easy to use since you might already use it.
It is great for basic checks.
La nostra opinione
Want expert-level writing? Grammarly Premium’s plagiarism checker scans 16+ billion web pages, ensuring originality. Explore it today!
Vantaggi principali
- 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.
Prezzi
All the plans will be billed annually.
- Free: $0/month.
- Pro: $12/month
- Enterprise: Custom pricing based on your needs.
Professionisti
Contro
Guida per gli acquirenti
During our research to find the go-to solution for Copyleaks Alternatives, we determined the best choices based on a few critical factors.
We did not just paste text into plagiarism tools and call it a day.
Instead, we focused on what truly matters to professional writers, content marketers, and educational institutions in 2025.
This involved deep diving into the capabilities of each plagiarism detection software.
It ensures we are recommending the best fit for ensuring content originality and content authenticity.
When doing our research to find the best product, we determined it using these factors:
- AI Content Detection Accuracy: This was the most important factor. How well did the software detect AI-generated text and AI-written content versus human-written content? We checked for false positives—when original human-written text is wrongly flagged as AI—and looked at the ability to detect content from the latest AI models. We gave extra points for high AI score reliability.
- Plagiarism Detection Capability: We looked at the core function: How well did the tool find plagiarism? We checked whether it could identify instances of plagiarized content and self-plagiarism, and compare them against multiple documents or just the web. We also checked the clarity of the plagiarism score and how easy it was to get a detailed analysis or a PDF report.
- Pricing and Accessibility: We analyzed the subscription plan and paid plans, focusing on any credit-based system. Did they offer a limited free version or free access? Was there a reliable free version or free plan for individual users? We prioritized accessible tools for new users and noted how limited free access was.
- Target Audience and Specific Features: Was the tool specifically designed for academic integrity in academic papers or for professional settings, like content verification for online content? We looked for features like LMS integration, the ability to upload documents, and how easy the simple interface made it to run drafts. We also checked if they offered a solution like Copyleaks, but better.
- Versatility and Performance: Could the software check multiple languages or only English? We looked for support for other languages and different languages. How fast did it process large volumes of text? Did it compare well to other tools and popular tools? Finally, we noted the frequency of false alarms and the overall user experience.
Conclusione
We have reviewed the nine best alternatives to Copyleaks.
The main goal was to help you find a tool that excels at plagiarism detection and new AI tools.
We looked at all the key factors like accuracy and cost.
Remember, top choices like GPTZero offer a great free tools experience.
Others, like Originality AI, focus on a powerful premium plan for professionals.
Finding the right software is about choosing features that matter most to you.
This list of great tools lets users check for both copying and the latest Copyleaks AI detector challenges.
Pick the one that fits your budget and needs today!
Domande frequenti
What are the main differences between Plagiarism and AI detection?
Plagiarism checks for similar text against existing sources, ensuring originality. AI detection analyzes writing patterns to predict if a machine wrote the content. Both are needed to ensure content originality in today’s world.
Do I need a single platform for both Plagiarism and AI checking?
Yes, for efficiency, finding one platform that handles both is best. This saves you time and money, giving you both a plagiarism score and an AI score in one go. Many users prefer this simple, consolidated approach.
What is the most critical feature for professional use?
For professional use, the ability to generate detailed reports is key. These reports break down exactly where copied or AI-generated text was found, allowing users to make precise edits quickly and maintain high standards.
Can AI-written content pass a traditional plagiarism checker?
Often, yes. AI generates new text sequences that do not match existing sources, so they contain no similar text. That is why a dedicated AI detector is necessary alongside traditional plagiarism tools to verify authenticity.
Why should I choose a premium plan alternative over the free tools?
Premium plan alternatives often offer unlimited scans, better support, and higher accuracy for professional use. While free tools are great for basic checks, paid options give you the high-level security and detailed reports needed for commercial work.
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