kitio.aiGPTZero vs TheChecker.AI
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. GPTZero 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
- AI probability score
- Sentence highlighting
- Writing replay in Google Docs
- Plagiarism checker
- API
- AI probability scoring
- Paragraph-level analysis
- PDF and document upload
- Text humanizer
- MCP tools for Claude
| Feature | GPTZero | TheChecker.AI |
|---|---|---|
| Best for | AI detector that flags machine-written text for teachers and editors | 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 | GPTZero | TheChecker.AI |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
GPTZero 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 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
GPTZero
- Free tier for regular checks
- Writing replay shows the drafting process
- LMS integrations
- Scores are probabilities, not proof
- Can misjudge non-native English writing
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 GPTZero if you want:
- Free tier for regular checks
- Writing replay shows the drafting process
- LMS integrations
Watch out: scores are probabilities, not proof.
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.
GPTZero vs TheChecker.AI FAQ
What is the difference between GPTZero and TheChecker.AI?
GPTZero: AI detector that flags machine-written text for teachers and editors. TheChecker.AI: AI text detector with a humanizer and an MCP connector for Claude. Both are writing tools.
Is GPTZero or TheChecker.AI cheaper?
GPTZero starts at See pricing page and TheChecker.AI starts at $9.90/mo. Check both pricing pages for current plans.
Do GPTZero and TheChecker.AI have free plans?
GPTZero: Yes. TheChecker.AI: Yes.
Who makes GPTZero?
GPTZero is made by GPTZero, based in United States.
Who makes TheChecker.AI?
TheChecker.AI is made by TheChecker.AI.
Which should I choose, GPTZero or TheChecker.AI?
Choose GPTZero if you value free tier for regular checks and writing replay shows the drafting process. Choose TheChecker.AI if you value unlimited checks on the paid plan and works inside claude through mcp.