Best Copyleaks alternatives

Comparison

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

Online AI content detector that flags AI-written text and images, plus paraphrasing, grammar and plagiarism tools for writers, students and educators.

Yes, there is a free plan. Free plan, no credit card needed, with limited access to the tools (the 15,000-character limit shown on the homepage applies to the detector input).

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

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