O
OAI content detection, plagiarism and fact checking for publishers and educators
Free, from $12.95/mo
GPTZero vs WriteHuman
Pricing, features, platforms and who each one suits — side by side.
G
Choose GPTZero if…
- you're in its core audience: teachers and educators, students
W
Choose WriteHuman if…
- you work on iOS, Android
- you're in its core audience: students, content writers
Side by side
Feature GPTZero WriteHuman
Pricing modelFreemiumFreemium
Starting price—$12/mo
Free plan
Free trial
API
Open source
Security and complianceSOC 2 Type II, CCPA, GDPR—
Sentence-level highlights—
Plagiarism checker—
Writing replay—
Bulk processing—
Shareable reports—
Docs/LMS integration—
PlatformsWeb, Chrome, APIWeb, Chrome, iOS, Android, API
CategoryAI DetectorsAI Humanizers
CompanyGPTZero LLC · United States · since 2023WriteHuman
Full feature lists
G GPTZero
- Detects text from ChatGPT, Claude and Gemini
- Highlights passages likely to be AI-generated
- Writing Replay shows how a document was typed
- Plagiarism checker for unattributed content
- Hallucination detector
- Grammar check and writing feedback
- Google Docs, Google Classroom, Canvas and Zapier integrations
- API with code samples in 17 languages
W WriteHuman
- Rewrites AI text from ChatGPT, Claude and Gemini
- Sentence-by-sentence AI detection scoring
- AI image detector
- Enhanced humanization model on paid plans
- Up to 5 output variations per request
- Supports 40+ languages
- REST API priced per word
- MCP integration for AI agents
Their home pages
What each vendor shows first: the pitch, the plans and the sign-up.
GPTZero · gptzero.me
WriteHuman · writehuman.aiWhat you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
What the free plans include
GPTZero
- 0 / 10,000 characters per scan in the AI detector box
WriteHuman
Free plan limits aren't published.
All plans and prices
GPTZero
FreeFree
Professional TeamPrice not shown on page
WriteHuman
Free$0
Basic$12/mo billed yearly ($20 monthly)
Pro$19/mo billed yearly ($29 monthly)
Ultra$39/mo billed yearly ($59 monthly)
Price changes we've recorded
We re-read each pricing page every month and log what changed.
GPTZero
No changes since we started tracking.
WriteHuman
- Nov 8, 2026Free: Free → $0; Basic: $20 → $12; Pro: $29 → $19; Ultra: $59 → $39
Strengths and limitations
GPTZero
- Free tier available to get started
- Integrates with Google Docs, Google Classroom, Canvas and Zapier
- Fully supports five languages
- States SOC 2 Type II, FERPA, GDPR and CCPA compliance
- Individual plan prices could not be read from the pricing page
- Team plan requires at least 2 seats and payment by card only
- No native mobile apps mentioned
WriteHuman
- Free plan includes 3 humanizations and 10 detection checks a month
- Apps for web, Chrome, iOS and Android
- Detector and image detector included on every plan
- Cancel anytime with no contracts
- Free plan limited to 250 words per request
- Monthly billing costs notably more than yearly ($20 vs $12 for Basic)
- Basic plan caps requests at 80 per month
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Facts from each vendor's public pages, prices checked Nov 5, 2026. Editorial policy