We've curated 50 of the best alternatives to Duplichecker, ranked by feature overlap, topic similarity, user ratings, and popularity. AI Plagiarism Checker, Copyleaks, and PlagAI lead the list as the closest matches.
Updated May 18, 2026
The list includes 1 free alternative, 45 freemium, and 4 paid, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. Duplichecker itself is freemium, which makes freemium alternatives the most natural starting point.
Many of these tools cluster around use cases like Free + From $10/mo, Text Analysis, Plagiarism Detection, and Content Verification — the same problem spaces Duplichecker addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with Duplichecker.
Ranked by compatibility score
Plagiarism Detection
Find AI generated content in no time
Like Duplichecker, AI Plagiarism Checker is in the Plagiarism Detection category. AI Plagiarism Checker is paid, while Duplichecker is freemium. Worth comparing on the detail page.
Plagiarism Detection
Detect plagiarism and AI-generated content instantly
1 free and 45 freemium options.
4 paid options.
4 paid alternatives to Duplichecker on /tools/duplichecker/alternatives.
26 additional candidates
AI Plagiarism Checker ranks as the highest-scoring alternative to Duplichecker, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 1 fully free and 45 freemium alternatives are available, including ZeroGPT Plus, Winston AI, and GPTZero.
AI Plagiarism Checker is priced differently (paid) and sits in the same category (Plagiarism Detection). View its detail page to compare features, integrations, and reviews side-by-side.
Top Plagiarism Detection alternatives include AI Plagiarism Checker, Copyleaks, PlagAI, and Plagiarismremover. These tools share the same primary category and have meaningful topic overlap with Duplichecker.
Like Duplichecker, Copyleaks is in the Plagiarism Detection category. Copyleaks is paid, while Duplichecker is freemium. Worth comparing on the detail page.
Plagiarism Detection
Detect plagiarism instantly and affordably.
Like Duplichecker, PlagAI is in the Plagiarism Detection category. PlagAI is paid, while Duplichecker is freemium. Worth comparing on the detail page.
Plagiarism Detection
Make your content 100% unique with AI-powered rephrasing.
Like Duplichecker, Plagiarismremover is in the Plagiarism Detection category. Plagiarismremover is paid, while Duplichecker is freemium. Worth comparing on the detail page.
Plagiarism Detection
Detect AI-generated content with precision.
Like Duplichecker, ZeroGPT Plus is in the Plagiarism Detection category. ZeroGPT Plus is free, while Duplichecker is freemium. Worth comparing on the detail page.
Ai Content Detection
Instantly detect AI-generated content.
Winston AI shares 4 topics with Duplichecker: Content Verification, Copyright Infringement, and Text Analysis. Both are freemium.
Ai Content Detection
Detect AI-generated content with accuracy
GPTZero shares 3 topics with Duplichecker: Copyright Infringement, Plagiarism Detection, and Free + From $10/mo. Both are freemium.
Ai Content Detection
Polishing text accuracy with AI.
AI Detector shares 3 topics with Duplichecker: Content Verification, Text Analysis, and Plagiarism Detection. Both are freemium.
Ai Content Detection
Detect AI-generated content with precision.
Detecting-AI.com shares 2 topics with Duplichecker: Content Verification and Text Analysis. Both are freemium.
Document Q&a
Document reading made easy with AI.
honeybear.ai shares 2 topics with Duplichecker: Text Analysis and Free + From $10/mo. Both are freemium.
Ai Content Detection
Detect AI-generated text with high accuracy.
ZeroGPT shares 2 topics with Duplichecker: Text Analysis and Plagiarism Detection. Both are freemium.
Ai Content Detection
Discover WriteHuman's AI Detector: distinguishing between AI-generated and human-written text.
WriteHuman: AI Detector shares 2 topics with Duplichecker: Content Verification and Text Analysis. Both are freemium.
Ai Content Detection
Check if any text is AI-generated with AI Text Detector.
AI Text Detector shares 2 topics with Duplichecker: Content Verification and Plagiarism Detection. Both are freemium.
Writing
Instantly improve your writing with AI without changing tabs.
Wandpen shares 2 topics with Duplichecker: Text Analysis and Free + From $10/mo. Both are freemium.
Scheduling
AI-powered scheduling to drive business results
Calendly shares 1 topic with Duplichecker: Free + From $10/mo. Both are freemium.
Workflow Automation
AI agents for R&D leaders
Kypso shares 1 topic with Duplichecker: Free + From $10/mo. Both are freemium.
Youtube Summaries
Daily YouTube summaries from your favourite channels.
Links & Briefs shares 1 topic with Duplichecker: Free + From $10/mo. Both are freemium.
Ai Research Assistant
Fastest Way To Read & Write - Your Research Focused AI Workspace
Otio shares 1 topic with Duplichecker: Free + From $10/mo. Both are freemium.
Audio Transcription
🎯 3 free transcripts every day. 🔥 Unlimited transcription starting at $10/mo.
TurboScribe shares 1 topic with Duplichecker: Free + From $10/mo. Both are freemium.
Document Analysis
Uncover insights from text with AI-powered NLP.
Amazon Comprehend shares 1 topic with Duplichecker: Text Analysis. Both are freemium.
Grammar Checking
Proofread and rate your essays with AI-powered grammar checks.
PaperRater shares 1 topic with Duplichecker: Plagiarism Detection. Both are freemium.
Maps
Turn text into interactive maps in seconds
Textomap shares 1 topic with Duplichecker: Text Analysis. Both are freemium.
Database Q&a
ChatGPT for data, embedded in your app.
Defog shares 1 topic with Duplichecker: Text Analysis. Both are freemium.
Large Language Models
Create custom NLP models effortlessly
Numind shares 1 topic with Duplichecker: Text Analysis. Both are freemium.
40 more free/freemium alternatives listed below. Browse all Duplichecker alternatives ↓
46 free or freemium alternatives to Duplichecker on /tools/duplichecker/alternatives.
LongLLaMa shares 1 topic with Duplichecker: Text Analysis. Both are freemium.
Neither Duplichecker nor AI Plagiarism Checker has user ratings yet — be the first to review either tool to help future visitors compare them.
