The closest alternatives to Copyscape on Lister are Quetext, Grammarly and Turnitin, the companies that share the most rankings with it. Each is compared below on its stated best fit, starting price and Lister Score.
How to choose an alternative to Copyscape
Start from what you need it for. Where each fits best, as Lister records it:
- Quetext: Educators wanting to detect paraphrased content
- Grammarly: Essay writing and grammar checking
- Turnitin: Educational institutions and academic environments
- Originality.AI: Content agencies and enterprises requiring AI detection
- iThenticate: Researchers, publishers, and academic professionals
- Viper: Users preferring offline, desktop-based plagiarism checking
- Microsoft Editor: Microsoft 365 users and organisations requiring integrated writing support within their existing ecosystem
- QuillBot: Paraphrasing and vocabulary enhancement
- Smodin: Multilingual content creators, international organisations and those requiring plagiarism checking
- ProWritingAid: Long-form fiction and academic writing
Closest to Copyscape by the rankings they share: Quetext (2 rankings), Grammarly (2 rankings) and Turnitin (2 rankings).
Free to start, by their stated pricing: Grammarly, Microsoft Editor and Smodin.
Stated starting prices: Quetext ($9.99/month), Turnitin ($27/user/year), Originality.AI ($20/month), iThenticate ($120/month), Viper ($99 one-time purchase), QuillBot ($9.95 per month) and ProWritingAid ($10 per month).
Each Lister Score is the alternative's score on the ranking named in its row, so compare scores within one ranking rather than across rankings. How the score is made.
Each alternative in brief
01
Deep search plagiarism detection with detailed analysis
#1 in Best plagiarism checkers: Quetext is an all-in-one writing assistant offering plagiarism checking and AI detection. It also provides grammar correction, summarisation, and paraphrasing tools for users.
PROS- Excellent at finding paraphrased content
- Affordable monthly subscription with student discounts
CONS- Smaller database than Turnitin
- Less institutional adoption and support
96.0
02
#1 in Top 10 AI Grammar-Check Tools: Grammarly uses advanced AI to detect and correct grammatical errors, spelling mistakes, punctuation issues, and style improvements. It offers real-time suggestions across web browsers, Microsoft Office, and native applications, with tone detection and plagiarism checking in premium tiers.
PROS- Integrates seamlessly across browsers and word processors
- Provides clear explanations for writing suggestions
CONS- Full sentence rewrites and advanced style guides require a paid plan
95.0
03
The industry standard for academic plagiarism detection
#1 in Top 10 AI Plagiarism Detectors: Turnitin is the most widely adopted plagiarism detection platform globally, used by millions of educators and students across 10,000+ institutions. It combines sophisticated pattern matching with the world's largest academic content database.
PROS- Extensive academic database with billions of documents
- Comprehensive reporting with detailed originality scores and source identification
CONS- Higher cost for smaller institutions
- Steep learning curve for new administrators
95.0
04
AI-powered plagiarism and content authenticity detection
#2 in Best plagiarism checkers: Originality.AI is an AI detection platform claiming high accuracy across leading large language models. It offers tools for plagiarism checking, grammar correction, and fact verification.
PROS- Dual detection for plagiarism and AI content
- Competitive pricing with flexible monthly plans
CONS- Smaller academic database compared to Turnitin
- Less established in institutional education sector
94.0
05
Professional plagiarism detection for researchers and publishers
#6 in Top 10 AI Plagiarism Detectors: iThenticate is designed specifically for researchers, publishers, and academic professionals. It checks content against extensive academic and publication databases to ensure originality before submission.
PROS- Comprehensive database of research papers and journals
- Detailed matching and citation analysis for academic work
CONS- Significantly higher cost than alternatives
- Primarily designed for pre-submission checking
83.3
06
Desktop-based plagiarism detection software
#9 in Best plagiarism checkers: Viper is an online tool that accurately detects plagiarism and AI-generated content. It helps students and professionals ensure document originality against billions of sources.
PROS- Offline functionality without requiring internet for checks
- One-time purchase with no ongoing subscription fees
CONS- Limited updates compared to cloud-based alternatives
- Smaller database than web-based competitors
84.0
07
AI-powered writing assistance built into Microsoft 365
#2 in Top 10 AI Grammar-Check Tools: Microsoft Editor is integrated into Word, Outlook, and web versions of Office applications, providing real-time grammar, spelling, and clarity suggestions. It includes advanced features like tone detection, formality adjustment, and inclusive language recommendations.
PROS- Fully integrated into Word, Outlook, and web browsers with zero additional setup
- Free tier covers core grammar and spelling; premium tier adds clarity and conciseness suggestions
CONS- Advanced features only available with paid Microsoft 365 subscription
- Less comprehensive than dedicated grammar checkers in style and tone detection
92.7
08
#4 in Top 10 AI Grammar-Check Tools: QuillBot specialises in paraphrasing and rewriting text whilst checking grammar. Its AI models help users rephrase sentences, adjust tone, and improve clarity. It integrates with popular browsers and offers both standalone web and desktop applications.
PROS- Powerful and versatile paraphrasing modes
- Built-in citation generator and summariser
CONS- Paraphrased output can sometimes alter original meaning
88.0
09
Multi-Language AI Writing Platform
#5 in Best plagiarism checkers: Smodin is an AI-powered writing platform offering detection, humanisation, and plagiarism checking. It combines these tools into a single workspace for students and professionals.
PROS- Extensive multilingual support unmatched by most competitors
- Integrated plagiarism detection alongside paraphrasing features
CONS- English paraphrasing quality slightly lower than English-focused tools
- User interface somewhat cluttered with multiple features
88.0
10
#5 in Top 10 AI Grammar-Check Tools: ProWritingAid provides comprehensive writing analysis with detailed reports on grammar, style, readability, and tone. It offers visual graphs tracking writing patterns and includes a library of writing guides. Integration with Word, Google Docs, and browsers is seamless.
PROS- In-depth writing reports and stylistic analysis
- Flexible lifetime license purchasing options
CONS- Steeper learning curve due to overwhelming data
85.7