Question 1

Can I upgrade or downgrade my plan at any time?

Accepted Answer

Yes, you can upgrade or downgrade your plan at any time. Changes to your subscription will take effect immediately, and we'll prorate any charges or credits accordingly.

Question 2

Is there a free trial available?

Accepted Answer

Yes, we offer a free plan with 5 AI detections per month. No credit card is required to start, and you can upgrade to Pro anytime for unlimited detections and advanced features.

Question 3

What payment methods do you accept?

Accepted Answer

We accept all major credit cards (Visa, Mastercard, American Express, Discover), PayPal, and Apple Pay. For annual Enterprise plans, we also offer invoice payment options.

Question 4

Can I get a refund if I'm not satisfied?

Accepted Answer

We offer a 30-day money-back guarantee for all new subscriptions. If you're not completely satisfied with GPTZero's AI detection capabilities, contact our support team within 30 days for a full refund.

Question 5

Do you offer discounts for educational institutions?

Accepted Answer

Yes, we offer special pricing for educational institutions, students, and teachers. Academic integrity is important to us - contact our sales team with your credentials for education discounts.

機能	無料	プロ	永久
AI Content Detection	Basic	Advanced	Advanced
Common Writing Tools	Limited (3/month)	Unlimited	Unlimited
Pro Writing Tools	Limited (1/month)	Unlimited	Unlimited
Content Generation	Limited (3/month)	Unlimited	Unlimited
Plagiarism Detection	Limited (1/month)	Unlimited	Unlimited
Advanced Analytics	—	✓	✓
Payment Model	Free	Monthly/Annual Subscription	One-time Payment

詳細なプラン比較

よくある質問

カスタムソリューションが必要ですか？

詳細なプラン比較

よくある質問

いつでもプランをアップグレードまたはダウングレードできますか？

無料トライアルはありますか？

どのような支払い方法を受け付けていますか？

永久プランとは何ですか、またどのように機能しますか？

満足できない場合、返金を受けることはできますか？

教育機関向けの割引はありますか？

カスタムソリューションが必要ですか？