Copyleaks vs Quillbot: Which is Better?
Copyleaks and Quillbot are two AI-powered tools used for different purposes—Copyleaks specializes in plagiarism detection, while Quillbot is primarily a paraphrasing and writing enhancement tool. This article compares these tools in terms of features, accuracy, usability, pricing, and best use cases to help you decide which one suits your needs.
1. Overview
Copyleaks
Copyleaks is an advanced plagiarism detection tool that scans content across the internet, academic databases, and internal repositories to identify copied or AI-generated text. It is widely used by educational institutions, publishers, and businesses to maintain originality.
Key Features:
- Detects plagiarism from billions of sources
- Identifies AI-generated content
- Supports multiple file formats
- API integration for developers
- Supports multiple languages
Quillbot
Quillbot is a writing assistant that helps users paraphrase, summarize, and improve content. It is widely used by students, writers, and professionals to refine their writing style and avoid plagiarism by rewording content effectively.
Key Features:
- AI-powered paraphrasing tool
- Grammar and spell checker
- Summarizer tool for long texts
- Citation generator for academic writing
- Supports multiple writing tones and styles
2. Plagiarism Detection
Copyleaks
✅ Strengths:
- Highly accurate in detecting exact and near-duplicate plagiarism
- Compares content against a vast academic and internet database
- Can differentiate between AI-generated and human-written content
❌ Weaknesses:
- Can sometimes flag common phrases as plagiarism (false positives)
- Requires an internet connection for verification
Quillbot
✅ Strengths:
- Offers a basic plagiarism checker (only in the premium version)
- Helps users rewrite content to avoid plagiarism
❌ Weaknesses:
- Less comprehensive than Copyleaks in detecting plagiarism
- Limited database for plagiarism checking
Winner: 🏆 Copyleaks – More reliable for plagiarism detection.
3. Paraphrasing & Writing Enhancement
Copyleaks
✅ Strengths:
- Can detect paraphrased plagiarism
- Ensures originality in reworded content
❌ Weaknesses:
- Does not provide a paraphrasing tool for rewriting text
- Focuses mainly on detecting copied content rather than improving writing
Quillbot
✅ Strengths:
- Powerful AI-driven paraphrasing tool with multiple modes (Fluency, Formal, Creative, etc.)
- Helps improve clarity, tone, and readability
- Supports multiple languages
❌ Weaknesses:
- Cannot detect if paraphrased content is still plagiarized
- Limited effectiveness in highly technical writing
Winner: 🏆 Quillbot – More effective for rewriting and improving content.
4. AI Content Detection
Copyleaks
✅ Strengths:
- Detects AI-generated content from models like GPT-4, ChatGPT, and Bard
- Useful for educators and businesses to verify originality
❌ Weaknesses:
- Sometimes struggles with highly edited AI-generated text
Quillbot
- ❌ Does not detect AI-generated text
Winner: 🏆 Copyleaks – Ideal for AI content detection.
5. Ease of Use
Copyleaks
- User-friendly plagiarism checker with a simple interface
- Requires users to upload files or paste content for scanning
- Dashboard may feel overwhelming for new users
Quillbot
- Intuitive and easy-to-use paraphrasing tool
- Simple copy-paste functionality
- No need to upload files
Winner: 🏆 Quillbot – More beginner-friendly.
6. Pricing
Copyleaks Pricing
- Free version: Limited features
- Premium plans: Based on word count and usage
- Enterprise pricing: Custom plans for institutions and businesses
Quillbot Pricing
- Free version: Basic paraphrasing with limited modes
- Premium: Starts at $8.33/month for full access to paraphrasing, plagiarism checking, and advanced writing modes
Winner: 🏆 Quillbot – More affordable for individual users.
7. Best Use Cases
| Feature | Copyleaks | Quillbot |
|---|---|---|
| Plagiarism Detection | ✅ Best for detecting plagiarism | ❌ Limited detection |
| AI Content Detection | ✅ Detects AI-generated text | ❌ Not available |
| Paraphrasing | ❌ Not available | ✅ Best for rewriting content |
| Grammar & Style Improvement | ❌ Not available | ✅ Strong grammar and style checker |
| Ease of Use | Medium learning curve | Very user-friendly |
| Pricing | Higher for plagiarism detection | More budget-friendly |
Final Verdict: Which One is Better?
- Choose Copyleaks if you need an advanced plagiarism and AI content detection tool. It is ideal for universities, publishers, and businesses looking to ensure originality.
- Choose Quillbot if you need a paraphrasing, summarizing, and writing enhancement tool. It is perfect for students, writers, and professionals who want to improve their writing and avoid accidental plagiarism.
👉 Bottom Line:
If your goal is plagiarism detection, Copyleaks is the better choice.
If your goal is rewriting and improving content, Quillbot is the best option.