Best ZeroGPT alternatives

Comparison

Tool	Price from	Free plan	Category
ZeroGPT	not listed	yes	AI detectors
GPTZero	not listed	yes	AI detectors
Undetectable AI	5.00 USD/mo	trial	AI detectors
Copyleaks	13.99 USD/mo	trial	AI detectors
Resemble AI	1,000 USD/mo	trial	AI detectors
Turnitin	not listed	?	AI detectors
AI or Not	5 USD/mo	yes	AI detectors
Originality.ai	12.95 USD/mo	yes	AI detectors
Pangram	20 USD/mo	trial	AI detectors

Each alternative in short

1. GPTZero

Free AI detector that scores text for AI-generated content, sentence by sentence, for educators, students and writers.

Yes, there is a free plan. Free basic AI detection by pasting text into the scanner; the homepage advertises it as free. Paid features are not detailed in the provided text.

2. Undetectable AI

Detects AI-generated text and images and rewrites AI writing so it reads as human, for students, writers and professionals.

There is a free trial. Free trial limited to 250 words; additional usage requires a paid plan.

3. Copyleaks

Detects AI-generated and plagiarized text, images, and video, mainly for schools, publishers, and enterprises protecting content and IP.

There is a free trial. Free start for students (Start for Free / Start now for free); scan credits are limited on the individual plans.

4. Resemble AI

Real-time detection of AI-generated audio, video and images, plus watermarking, for enterprises fighting deepfake fraud.

There is a free trial. Flex plan: no subscription fee, pay for credits as you go, platform and API access, no credit card needed to start.

5. Turnitin

Academic integrity platform that detects plagiarism and AI-generated writing and supports grading and feedback for schools and universities.

The vendor does not state this clearly on the homepage or pricing page.

6. AI or Not

Detects AI-generated text, images, music, video and deepfakes, for individuals and businesses via web or API.

Yes, there is a free plan. 5 USD in free credits, 1M words of AI text detection per month, 20 AI image checks and an API key included.

7. Originality.ai

AI detector and content checker that flags AI-generated text and plagiarism for writers, editors, teachers and publishers.

Yes, there is a free plan. Basic plan with AI detection only: 3 scans per day, limit of 2,000 words per scan, file upload (docx, pdf, doc). No subscription required.

8. Pangram

AI detector that flags text and images likely generated by ChatGPT, Claude, Gemini and other models, for educators, publishers and organizations.

There is a free trial. Free tier with limited free scans (3 image scans per day shown); the Individual plan starts with a 7-day free trial.

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