kitio.aiGPTZero vs Wou 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 Wou AI starts at $10/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
- Works in any text field
- Keyboard commands
- Grammar fixes
- Translation
- Custom chatbot data
| Feature | GPTZero | Wou AI |
|---|---|---|
| Best for | AI detector that flags machine-written text for teachers and editors | Browser extension that adds AI writing help to any text field |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $10/mo |
| Free plan | Yes | Yes |
| Made by | GPTZero | Wou 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 Wou AI starts at $10/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
2 plans
Free
Free
- Daily usage limit
- Core writing features
Unlimited
$10/mo
- No daily limit
- Also $100 per year
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
Wou AI
- Works across websites
- No separate AI account needed
- Replaces text inside the field
- Free plan has daily limits
- Credit card is the only payment method
- Few details on supported browsers
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 Wou AI if you want:
- Works across websites
- No separate AI account needed
- Replaces text inside the field
Watch out: free plan has daily limits.
GPTZero vs Wou AI FAQ
What is the difference between GPTZero and Wou AI?
GPTZero: AI detector that flags machine-written text for teachers and editors. Wou AI: Browser extension that adds AI writing help to any text field. Both are writing tools.
Is GPTZero or Wou AI cheaper?
GPTZero starts at See pricing page and Wou AI starts at $10/mo. Check both pricing pages for current plans.
Do GPTZero and Wou AI have free plans?
GPTZero: Yes. Wou AI: Yes.
Who makes GPTZero?
GPTZero is made by GPTZero, based in United States.
Who makes Wou AI?
Wou AI is made by Wou AI.
Which should I choose, GPTZero or Wou AI?
Choose GPTZero if you value free tier for regular checks and writing replay shows the drafting process. Choose Wou AI if you value works across websites and no separate ai account needed.