GPT Human
Writing & Copy
AI humanizer for rewriting and natural-sounding content
Free plan; paid plans from £6/month annually.
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8.1/10
Updated Sep 15, 2026
Reviewed by TopSaver Editorial
AI Writing
AI Content Detection
Content Optimisation
Undetectable AI is best suited to writers who need AI detection, text humanization, rewriting, and related content tools in one workspace.
Undetectable AI combines AI detection with humanization, plagiarism checking, paraphrasing, SEO writing, image detection, essay writing, and browser-based tools. Its appeal is the breadth of writing and checking features in one platform. However, users should treat detector scores as indicators rather than absolute proof, and generated rewrites still require human review.
Overview
Undetectable AI is a content-focused platform built around AI detection and text humanization. It also includes plagiarism checking, paraphrasing, essay writing, SEO writing, image detection, and a Chrome extension. The current pricing page lists monthly plans based on word volume, starting at about £7.41/month for 10,000 words when converted from the displayed US price.
AI detection and text humanization in one workflow
Undetectable AI stands out by combining detection and rewriting rather than requiring separate tools. Users can check whether text may be flagged as AI-generated, then use Humanizer or other writing tools to revise it. The platform also offers plagiarism checking, SEO writing, paraphrasing, image detection, and a browser extension. This makes it useful for content workflows, although rewritten text should still be checked for meaning, quality, and factual accuracy.
How it works
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1
Add Your Content
Paste your text or upload supported content into the relevant Undetectable AI writing or detection tool.
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2
Check the Writing
Run AI detection or plagiarism checks to identify possible issues in the submitted text.
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3
Humanize or Rewrite
Use Humanizer, paraphrasing, or other writing tools to revise the content and change its style or wording.
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4
Review and Finalise
Read the revised version carefully, verify its meaning and facts, then export or use the finished content in your workflow.
What you can do with Undetectable AI
- Checking content for possible AI-generated writing
- Rewriting AI-assisted drafts into more natural language
- Checking text for plagiarism concerns
- Improving SEO-focused articles and blog content
- Paraphrasing existing written material
- Reviewing essays and other long-form writing
Pros & cons
Pros
- Combines AI detection and text humanization in one writing workflow.
- Includes plagiarism checking, paraphrasing, and SEO writing tools.
- Supports writing workflows for essays, articles, marketing, and other content.
- Offers unlimited AI detecting across the displayed subscription plans.
- Provides API compatibility and an automated human-typing feature.
Cons
- Detector results should not be treated as definitive proof of AI authorship.
- Monthly plans limit humanization according to included word allowances.
- High-volume users need substantially larger plans or business arrangements.
- Trustpilot feedback is considerably more mixed than the G2 rating.
- Some recent users report billing, cancellation, and support frustrations.
Pricing
Paid
3-day free trial; plans from £7.41/month for 10K words; higher word limits available.
Alternatives to Undetectable AI
Same-purpose swaps in this category.
Originality.AI
Writing & Copy
AI content detection and quality checking for publishers
Limited free access; Pro from £11/month or £10/month annually; Enterprise from £133/month.
View tool
WriteHuman
Writing & Copy
AI humanizer and detector for more natural-looking writing
Free plan; paid plans from £15/month.
View tool
Frequently asked questions
Is Undetectable AI free to use?
Answer: Yes. Free tools are available, while premium subscriptions include a 3-day free trial with 250 trial credits before paid usage begins.
How much does Undetectable AI cost?
The displayed monthly plans start at about £7.41 for 10,000 words, £14.09 for 20,000, £22.99 for 35,000, £31.15 for 50,000, and £47.46 for 80,000 words.
What is Undetectable AI best for?
It is mainly designed for AI detection, humanization, rewriting, plagiarism checking, SEO writing, and other content-improvement workflows.
Does Undetectable AI include an AI detector?
Yes. Users can paste or upload text and check whether it may be identified as AI-generated content by the platform's detection system.
Does Undetectable AI include a plagiarism checker?
Yes. The platform provides a free AI plagiarism checker alongside its detection and humanization tools.
Undetectable AI
3-day free trial; plans from £7.41/month for 10K words; higher word limits available. 8.1/10