kitio.aiUndetectable AI vs Fixkey
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Undetectable AI starts at $9.99/mo and Fixkey starts at See pricing page. Check both pricing pages for current plans.
AI humanizer and detector that rewrites text to sound more natural
Freemium · $9.99/moAt a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- AI humanizer
- Multi-detector check
- Readability settings
- Paraphraser
- Chrome extension
- One-click rewriting
- Voice to text
- 180+ language translation
- Custom AI prompts
- Personal dictionary
- Works in any Mac app
| Feature | Undetectable AI | Fixkey |
|---|---|---|
| Best for | AI humanizer and detector that rewrites text to sound more natural | Mac writing assistant that rewrites and dictates in any app |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | $9.99/mo | See pricing page |
| Free plan | Yes | Yes |
| Made by | Undetectable AI | Fixkey |
| Based in | United States | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Undetectable AI starts at $9.99/mo and Fixkey starts at See pricing page. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
5 plans
10K words
$9.99/mo
- 10K words per month
- AI humanizer and detector
- Unlimited AI detecting
20K words
$19/mo
- 20K words per month
- All humanizer features
35K words
$31/mo
- 35K words per month
- All humanizer features
50K words
$42.50/mo
- 50K words per month
- All features from other plans
Business
Custom
- Non-expiring credits
- White labeling
- Priority support
Prices in USD, checked Oct 28, 2026 or later. Plans change often, so confirm on each tool's site before you buy.
Pros and cons
Undetectable AI
- Detector and humanizer in one place
- Readability controls
- Free detector checks
- Rewrites can lose nuance
- Using it to evade school rules breaks policies
Fixkey
- Works in every Mac app
- Dictation and rewriting in one tool
- Custom prompts for your style
- macOS only
- Free tier details not shown
- Pricing page shows only the yearly price
Which one should you choose?
Choose Undetectable AI if you want:
- Detector and humanizer in one place
- Readability controls
- Free detector checks
Watch out: rewrites can lose nuance.
Choose Fixkey if you want:
- Works in every Mac app
- Dictation and rewriting in one tool
- Custom prompts for your style
Watch out: macos only.
Undetectable AI vs Fixkey FAQ
What is the difference between Undetectable AI and Fixkey?
Undetectable AI: AI humanizer and detector that rewrites text to sound more natural. Fixkey: Mac writing assistant that rewrites and dictates in any app. Both are writing tools.
Is Undetectable AI or Fixkey cheaper?
Undetectable AI starts at $9.99/mo and Fixkey starts at See pricing page. Check both pricing pages for current plans.
Do Undetectable AI and Fixkey have free plans?
Undetectable AI: Yes. Fixkey: Yes.
Who makes Undetectable AI?
Undetectable AI is made by Undetectable AI, based in United States.
Who makes Fixkey?
Fixkey is made by Fixkey.
Which should I choose, Undetectable AI or Fixkey?
Choose Undetectable AI if you value detector and humanizer in one place and readability controls. Choose Fixkey if you value works in every mac app and dictation and rewriting in one tool.