H
Undetectable AI vs WriteHuman
Pricing, features, platforms and who each one suits — side by side.
U
Choose Undetectable AI if…
- you want the lower entry price ($5/mo vs $12/mo)
- you're in its core audience: students and educators, content writers and bloggers
W
Choose WriteHuman if…
- you work on iOS, Android
- you're in its core audience: marketers and seo writers, freelancers
Side by side
Feature Undetectable AI WriteHuman
Pricing modelFreemiumFreemium
Starting price$5/mo$12/mo
Free plan
Free trial
API
Open source
PlatformsWeb, Chrome, APIWeb, Chrome, iOS, Android, API
CompanyUndetectable Inc.WriteHuman
Full feature lists
U Undetectable AI
- Sentence-level AI text detection
- AI humanizer that rewrites structure, vocabulary and tone
- AI image, audio and video detection
- Fake PDF, receipt and ID detectors
- Paraphrasing tool and AI essay writer
- Human auto typer
- Chrome extension for Google Docs and Gmail
- Support for 50+ languages
W WriteHuman
- Rewrites AI text into natural-sounding prose
- AI probability shown for each sentence
- AI image detector
- Multiple output variations per request
- Supports 40+ languages
- Chrome extension with grammar and style suggestions
- REST API and MCP server for AI agents
- iOS, iPad and Android apps
What you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
Undetectable AI
10K words$5.00/mo billed yearly ($60/yr); $9.99/mo monthly
20K words$9.50/mo billed yearly ($114/yr); $19.00/mo monthly
35K words$15.75/mo billed yearly ($189/yr); $31.00/mo monthly
50K words$21.25/mo billed yearly; $42.50/mo monthly
BusinessCustom
WriteHuman
FreeFree
Basic$20/mo, or $12/mo billed yearly ($144)
Pro$29/mo, or $19/mo billed yearly ($228)
Ultra$59/mo, or $39/mo billed yearly ($468)
Strengths and limitations
Undetectable AI
- Annual plans start at $5/mo for 10K words
- Unlimited AI detection on paid plans
- Money-back guarantee if humanized output is flagged
- Chrome extension works in Google Docs and Gmail
- Free trial is limited to 250 words
- Accuracy is highest in English
- Monthly billing costs about twice the annual rate
WriteHuman
- Free plan includes 3 humanizations and 10 detection checks a month
- Detector, image detector and humanizer included in every plan
- Available on web, Chrome, iOS and Android, with an API
- Cancel anytime with no contracts
- Free plan caps requests at 250 words and uses the basic model
- Basic plan has no MCP access or priority support
- Monthly billing costs much more than annual billing ($20 vs $12 for Basic)
More comparisons
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AI HumanizersFree planAPI
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B
Freemium
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AI humanizer that rewrites AI text to pass AI detectors, with a built-in checker
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S
Paid
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Rewrite AI-generated text to read as human, with an AI detector and writer
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H
H
Freemium
P
POnline AI paraphrasing tool with multiple rewriting modes in 20+ languages
Free, from $3.96/mo
P
Free, from $3.96/mo
P
Online AI paraphrasing tool with multiple rewriting modes in 20+ languages
Paraphrasing & RewritingFree planAPI
W
WW
From $9/mo
W
AI rewriter that restructures sentences and rewrites articles in bulk
Paraphrasing & RewritingAPI
Facts from each vendor's public pages, prices checked Nov 8, 2026. Editorial policy