kitio.aiPlagiarismCheck.org vs TheChecker.AI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. PlagiarismCheck.org starts at See pricing page and TheChecker.AI starts at $9.90/mo. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- Plagiarism checker
- AI content detector
- LMS integrations
- Google Docs add-on
- Plagiarism check API
- Essay grader
- AI probability scoring
- Paragraph-level analysis
- PDF and document upload
- Text humanizer
- MCP tools for Claude
| Feature | PlagiarismCheck.org | TheChecker.AI |
|---|---|---|
| Best for | Plagiarism checker and AI detector for schools, students and businesses | AI text detector with a humanizer and an MCP connector for Claude |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $9.90/mo |
| Free plan | Yes | Yes |
| Made by | PlagiarismCheck.org | TheChecker.AI |
| Based in | – | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
PlagiarismCheck.org starts at See pricing page and TheChecker.AI starts at $9.90/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Monthly
$9.90/mo
- Unlimited AI detections
- 5,000 humanizer words a month
- PDF and document upload
Yearly
$99/yr
- Everything in Monthly
- Billed once a year
Enterprise
Contact sales
- LMS and API integration
- Bulk user management
- Advanced analytics
Prices in USD, checked Oct 29, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
PlagiarismCheck.org
- Integrates with seven major LMS platforms
- Checks for both plagiarism and AI text
- API for platforms and businesses
- Free check for individuals
- Plan prices not shown in the evidence
- AI detection can produce false positives
- Extra writing tools are fairly basic
TheChecker.AI
- Unlimited checks on the paid plan
- Works inside Claude through MCP
- Humanizer credits never expire
- Detection scores are probabilistic, not proof
- Humanizer words are capped each month
- Free option is only a demo
Which one should you choose?
Choose PlagiarismCheck.org if you want:
- Integrates with seven major LMS platforms
- Checks for both plagiarism and AI text
- API for platforms and businesses
Watch out: plan prices not shown in the evidence.
Choose TheChecker.AI if you want:
- Unlimited checks on the paid plan
- Works inside Claude through MCP
- Humanizer credits never expire
Watch out: detection scores are probabilistic, not proof.
PlagiarismCheck.org vs TheChecker.AI FAQ
What is the difference between PlagiarismCheck.org and TheChecker.AI?
PlagiarismCheck.org: Plagiarism checker and AI detector for schools, students and businesses. TheChecker.AI: AI text detector with a humanizer and an MCP connector for Claude. Both are writing tools.
Is PlagiarismCheck.org or TheChecker.AI cheaper?
PlagiarismCheck.org starts at See pricing page and TheChecker.AI starts at $9.90/mo. Check both pricing pages for current plans.
Do PlagiarismCheck.org and TheChecker.AI have free plans?
PlagiarismCheck.org: Yes. TheChecker.AI: Yes.
Who makes PlagiarismCheck.org?
PlagiarismCheck.org is made by PlagiarismCheck.org.
Who makes TheChecker.AI?
TheChecker.AI is made by TheChecker.AI.
Which should I choose, PlagiarismCheck.org or TheChecker.AI?
Choose PlagiarismCheck.org if you value integrates with seven major lms platforms and checks for both plagiarism and ai text. Choose TheChecker.AI if you value unlimited checks on the paid plan and works inside claude through mcp.