GPTZero vs StealthWriter (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
GPTZero
From $15/mo against from $20/mo
Free plan
Tie
Both have one
Higher rating
GPTZero
4.4 against 2.9
Same job?
Yes
Both are Writing tools

Side by side

Compared on	GPTZero	StealthWriter
Our rating	4.4Better	2.9
Starts at	$15/moBetter	$20/mo
Free plan	Yes	Yes
Category	Writing	Writing
Plans	From $15/mo	From $20/mo
Key features	AI-generated text detection across ChatGPT, Claude, Gemini, and other major LLMs Plagiarism detection bundled alongside AI detection in the same scan Hallucination detection that flags unsupported or fabricated claims in a document Chrome extension for scanning text without leaving the page it appears on API access for institutions screening submissions at scale	AI humanizer with light, medium and aggressive modes Bundled AI detector to verify the output Deep Scan sentence-by-sentence analysis Alternative rewrites per sentence V2 detection technology
Pros	One of the most established and widely recognized names in AI detection, with a large existing user base Combines AI detection with plagiarism and hallucination checks in a single workflow Free tier is usable for individual, lower-volume checks without a subscription	Sentence-level control rather than one blanket rewrite Free tier before any of the paid plans Detector included, so results are checkable
Cons	AI detection as a category carries an inherent false-positive risk on any tool, including this one Full-length document scanning beyond the free character limit requires a paid plan Recent acquisition introduces some uncertainty about how the standalone product evolves under Superhuman	Its purpose is defeating detection, and students are the first audience named Submitting rewritten work is academic misconduct at most institutions Detector evasion is an arms race; today's pass is tomorrow's fail
Company	GPTZero (Superhuman), founded 2023	AiVantage LLC

Prices come from each vendor's pricing page, last checked 20260814. Check the vendor before you buy.

FAQ

Questions people ask

Is GPTZero better than StealthWriter?

In our reviews GPTZero scores 4.4 and StealthWriter scores 2.9. The better pick depends on the job. GPTZero: An AI detector built at Princeton that identifies LLM-generated text and now backs Superhuman's authenticity tools. StealthWriter: Rewrites AI-generated text to defeat AI detectors, and ships a detector to check the result.

Which is cheaper, GPTZero or StealthWriter?

GPTZero has the lower starting price: from $15/mo for GPTZero and from $20/mo for StealthWriter.

Do GPTZero and StealthWriter have free plans?

Yes, both have a free plan.

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