Top Chrome Extensions for Plagiarism Checker
Plagiarism Checker Chrome extensions — 1.8M monthly searches · Rankings shifted 31× in 7 days · Top 3 locked — dominated by incumbents
What Developers Can Learn
Intelligence derived from tracked keywords across all Plagiarism Checker sub-keywords
Most Congested
With 21 active extensions and zero market concentration, the Plagiarism Checker space is wide open — but top performers hold modest user counts (8K max).
The gap between the top-rated extension (Integrito at 4.8) and the generic 'Plagiarism Checker' (3.0) signals that quality differentiation matters more than first-mover advantage.
Possible Openings
Adjacent keywords like 'Domain Authority Checker' (139.8K), 'Local SEO' (81K), and 'Sitemap Generator' (67K) offer lower-competition entry points for developers building broader SEO toolkits.
Positioning Patterns
The top 3 all include 'plagiarism' in their names, with AI detection emerging as a differentiator.
Integrito combines plagiarism and AI detection at 4.8 stars; Google Classroom integration drives 4.7 stars despite zero listed users.
Average top-5 rating of 3.9 suggests the market values quality improvements.
Top Extensions Leaderboard
7-day ranking snapshot and appearances in Top 10
| # | Extension | Users | Rating | Appearances | Category | Momentum |
|---|---|---|---|---|---|---|
| 1 |  Google Classroom plagiarism and AI checker | — | ⭐ 4.7 | 7/7d | Seo | ↓ dropping |
| 2 |  Plagiarism Checker | 8,000+ | ⭐ 3 | 7/7d | Seo | ↑ rising |
| 3 |  Integrito — Analyze Text, Check Plagiarism&AI | 5,000+ | ⭐ 4.8 | 7/7d | Seo | — stable |
| 4 |  Grammarly: AI Writing Assistant and Grammar Checker App | 41,000,000+ | ⭐ 4.5 | 7/7d | Seo | — stable |
| 5 |  Grammar, punctuation and plagiarism checker | 1,000+ | ⭐ 2.6 | 7/7d | Seo | — stable |
| 6 |  Advanced Plagiarism and AI Checker : PlagiarismDetector.net | 57 | ⭐ 4.8 | 7/7d | Seo | — stable |
| 7 |  SEO Content Checker: Plagiarism & Readability | 9,000+ | ⭐ 3.4 | 7/7d | Seo | — stable |
| 8 |  AI Detector and Human Writing Report - Originality.ai | 30,000+ | ⭐ 3.7 | 7/7d | Seo | — stable |
| 9 |  AI Content Detector - Copyleaks | 200,000+ | ⭐ 4.1 | 7/7d | Seo | ↓ dropping |
| 10 |  Polygraf AI Content Detector: Advanced Plagiarism & ChatGPT Detector | 1,000+ | ⭐ 4.4 | 7/7d | Seo | ↑ rising |
Google Classroom plagiarism and AI checker
— · ⭐ 4.7 · 7/7d
Plagiarism Checker
8,000+ · ⭐ 3 · 7/7d
Integrito — Analyze Text, Check Plagiarism&AI
5,000+ · ⭐ 4.8 · 7/7d
Grammarly: AI Writing Assistant and Grammar Checker App
41,000,000+ · ⭐ 4.5 · 7/7d
Grammar, punctuation and plagiarism checker
1,000+ · ⭐ 2.6 · 7/7d
Advanced Plagiarism and AI Checker : PlagiarismDetector.net
57 · ⭐ 4.8 · 7/7d
SEO Content Checker: Plagiarism & Readability
9,000+ · ⭐ 3.4 · 7/7d
AI Detector and Human Writing Report - Originality.ai
30,000+ · ⭐ 3.7 · 7/7d
AI Content Detector - Copyleaks
200,000+ · ⭐ 4.1 · 7/7d
Polygraf AI Content Detector: Advanced Plagiarism & ChatGPT Detector
1,000+ · ⭐ 4.4 · 7/7d
Ranking Volatility - Top 10 Ranks
7-day Top 10 movement snapshot (2026-03-31 to 2026-04-06)
✦ Entered Top 10 This Week
↓ Dropped Out of Top 10
Data Methodology
- Data source:
- Chrome Web Store search results
- Update frequency:
- Weekly
- Monthly Search Demand:
- Estimated demand indicator sourced from third-party keyword data. Not CWS-internal figures.
Is your extension visible
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Track your extension's ranking for any Plagiarism Checker keyword, monitor weekly changes, and find the exact gaps between you and the top 10.