S
SUndetectable AI vs Wordtune
Pricing, features, platforms and who each one suits — side by side.
U
Choose Undetectable AI if…
- you need an API to build on
- you're in its core audience: students, content writers and marketers
W
Choose Wordtune if…
- you want the lower entry price ($4.89/mo vs $5/mo)
- you work on iOS
- you're in its core audience: students, professionals
Side by side
Feature Undetectable AI Wordtune
Pricing modelFreemiumFreemium
Starting price$5/mo$4.89/mo
Free plan
Free trial
API
Open source
Data retention—Personal Information stored until AI21 deletes it or a valid deletion request
PlatformsWeb, Chrome, APIWeb, Chrome, iOS
CategoryAI HumanizersParaphrasing & Rewriting
CompanyUndetectable Inc.AI21 Labs Ltd.
Full feature lists
U Undetectable AI
- Sentence-level AI content detection
- AI humanizer that rewrites text to read naturally
- Paraphrasing tool and AI essay writer
- AI plagiarism checker and text watermark remover
- Image, audio, video and deepfake detectors
- Fake PDF, receipt and ID detectors
- Chrome extension for Google Docs and Gmail
- Supports 50+ languages
W Wordtune
- Contextual rewrite and paraphrase suggestions
- Tone switching between formal and casual
- Grammar and spelling correction
- Shorten or expand sentences
- Summarize articles, documents, webpages and YouTube videos
- Smart Translate into English from 10 languages
- Humanize AI-generated text
- Fact-checking against at least five sources
Their home pages
What each vendor shows first: the pitch, the plans and the sign-up.
Undetectable AI · undetectable.ai
Wordtune · wordtune.comWhat you'd pay
The cheapest plan that fits, per month, billed yearly where the plan offers it.
Work it out for your team
- WordtuneAdvanced$4.89/mo
- Undetectable AI10K words$5/mo
The cheapest paid plan with a published price that fits. Custom and sales-quoted plans aren't included.
What the free plans include
Undetectable AI
Free plan limits aren't published.
Wordtune
- 10 Rewrites & AI suggestions per day
- 3 AI summarizations per month
- Unlimited spelling corrections and grammar checks
All plans and prices
Undetectable AI
10K words$9.99/mo, or $5.00/mo billed yearly ($60)
20K words$19.00/mo, or $9.50/mo billed yearly ($114)
35K words$31.00/mo, or $15.75/mo billed yearly ($189)
50K words$42.50/mo, or $21.25/mo billed yearly
BusinessCustom
Wordtune
BasicFree
Advanced$4.89/mo billed annually ($6.99 list)
Unlimited$6.99/mo billed annually ($9.99 list)
Price changes we've recorded
We re-read each pricing page every month and log what changed.
Undetectable AI
- Nov 8, 2026Pricing model: Free trial → Freemium; 10K words: $5 → $9.99; 20K words: $9.50 → $19; 35K words: $15.75 → $31; 50K words: $21.25 → $42.50
Wordtune
No changes since we started tracking.
Strengths and limitations
Undetectable AI
- Detection and humanizing in one tool
- Unlimited AI detecting on all individual plans
- Yearly billing roughly halves the monthly price
- Chrome extension works in Google Docs and Gmail
- Free trial is limited to 250 words
- Accuracy is highest in English
- Humanizing is capped by the plan's monthly word limit
Wordtune
- Free plan includes 10 rewrites per day and unlimited grammar checks
- Available as Chrome and Edge extensions and as an iOS app
- Paid plans include a 3-day free trial
- Summarizes YouTube videos and webpages as well as text
- Free plan limited to 3 summarizations per month
- Discounted prices require annual billing
- No Android app or public API listed
- SAML SSO and centralized billing are not included in any listed plan
More comparisons
Other options to consider
SS
From $29.99/mo
H
HRewrites AI-generated text to read as human, with a built-in AI detector
Free, from $9.99/mo
H
Free, from $9.99/mo
H
Rewrites AI-generated text to read as human, with a built-in AI detector
AI HumanizersFree planAPI
W
WRewrites AI-generated text to read naturally, with a built-in AI detector
Free, from $12/mo
W
Free, from $12/mo
W
Rewrites AI-generated text to read naturally, with a built-in AI detector
AI HumanizersFree planAPI
B
BB
Freemium
B
Rewrites AI-generated text to read as human for students and marketers
AI HumanizersFree planAPI
H
HH
Freemium
G
GG
Freemium
G
AI text detector with plagiarism checks and writing replay for educators
AI DetectorsFree planAPI
Facts from each vendor's public pages, prices checked Oct 26, 2026. Editorial policy