kitio.aiQuillBot vs GPTZero
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. QuillBot starts at $19.95/mo and GPTZero starts at See pricing page. 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
- Paraphraser with multiple modes
- Grammar checker
- Summarizer
- AI detector
- Citation generator
- AI probability score
- Sentence highlighting
- Writing replay in Google Docs
- Plagiarism checker
- API
| Feature | QuillBot | GPTZero |
|---|---|---|
| Best for | Paraphraser with grammar checker, summarizer and citation tools | AI detector that flags machine-written text for teachers and editors |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | $19.95/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Learneo | GPTZero |
| Based in | United States | United States |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
QuillBot starts at $19.95/mo and GPTZero starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
3 plans
Free
Free
- 125-word paraphrases
- 2 paraphrasing modes
- Grammar checker
Premium
$19.95/mo
- Unlimited paraphrasing
- All modes
- Advanced grammar suggestions
Team
Contact sales
- Everything in Premium
- Multiple users, one purchase
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
QuillBot
- Many rewrite modes to choose from
- Generous free tier
- Several writing tools under one login
- Free plan limits word count per paraphrase
- Rewrites can change the meaning
- Heavy use raises academic integrity questions
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
Which one should you choose?
Choose QuillBot if you want:
- Many rewrite modes to choose from
- Generous free tier
- Several writing tools under one login
Watch out: free plan limits word count per paraphrase.
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.
QuillBot vs GPTZero FAQ
What is the difference between QuillBot and GPTZero?
QuillBot: Paraphraser with grammar checker, summarizer and citation tools. GPTZero: AI detector that flags machine-written text for teachers and editors. Both are writing tools.
Is QuillBot or GPTZero cheaper?
QuillBot starts at $19.95/mo and GPTZero starts at See pricing page. Check both pricing pages for current plans.
Do QuillBot and GPTZero have free plans?
QuillBot: Yes. GPTZero: Yes.
Who makes QuillBot?
QuillBot is made by Learneo, based in United States.
Who makes GPTZero?
GPTZero is made by GPTZero, based in United States.
Which should I choose, QuillBot or GPTZero?
Choose QuillBot if you value many rewrite modes to choose from and generous free tier. Choose GPTZero if you value free tier for regular checks and writing replay shows the drafting process.