kitio.aiDuden Mentor vs TextAdviser
A side-by-side look at pricing plans, free tiers, features, pros and cons, updated for 2026. Duden Mentor starts at See pricing page and TextAdviser starts at $4.99/mo. Check both pricing pages for current plans.
At a glance
Best for
Pricing model
Starting price
Free plan
Made by
Based in
Rating
Key features
- German spelling checks
- Grammar and punctuation
- Style tips
- Synonym suggestions
- Word add-in
- Spelling and grammar check
- Plagiarism checker
- AI content detector
- Android app with history
- Six interface languages
| Feature | Duden Mentor | TextAdviser |
|---|---|---|
| Best for | German spelling, grammar and style checker from the Duden dictionary | Grammar checker, plagiarism check and AI detector |
| Category | Writing | Writing |
| Pricing model | Freemium | Freemium |
| Starting price | See pricing page | $4.99/mo |
| Free plan | Yes | Yes |
| Made by | Cornelsen Verlag | TextAdviser |
| Based in | Germany | – |
| Rating | No ratings yet | No ratings yet |
| Key features |
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Pricing compared
Duden Mentor starts at See pricing page and TextAdviser starts at $4.99/mo. Check both pricing pages for current plans.
Free plan
Cheapest paid plan
Top plan
Free trial
1 plan
PRO
$4.99/mo
- 300,000 characters per 30 days
- Long texts in one check
- Priority queue, no ads
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
Duden Mentor
- Follows Duden rules exactly
- Free basic checks
- Works in Word and browsers
- German only
- Style features need Premium
TextAdviser
- Grammar, plagiarism and AI checks in one place
- Low-cost PRO subscription
- Unused characters carry over
- Character packs only for PRO subscribers
- Plagiarism checks eat the allowance fast
- AI detection is not conclusive proof
Which one should you choose?
Choose Duden Mentor if you want:
- Follows Duden rules exactly
- Free basic checks
- Works in Word and browsers
Watch out: german only.
Choose TextAdviser if you want:
- Grammar, plagiarism and AI checks in one place
- Low-cost PRO subscription
- Unused characters carry over
Watch out: character packs only for pro subscribers.
Duden Mentor vs TextAdviser FAQ
What is the difference between Duden Mentor and TextAdviser?
Duden Mentor: German spelling, grammar and style checker from the Duden dictionary. TextAdviser: Grammar checker, plagiarism check and AI detector. Both are writing tools.
Is Duden Mentor or TextAdviser cheaper?
Duden Mentor starts at See pricing page and TextAdviser starts at $4.99/mo. Check both pricing pages for current plans.
Do Duden Mentor and TextAdviser have free plans?
Duden Mentor: Yes. TextAdviser: Yes.
Who makes Duden Mentor?
Duden Mentor is made by Cornelsen Verlag, based in Germany.
Who makes TextAdviser?
TextAdviser is made by TextAdviser.
Which should I choose, Duden Mentor or TextAdviser?
Choose Duden Mentor if you value follows duden rules exactly and free basic checks. Choose TextAdviser if you value grammar, plagiarism and ai checks in one place and low-cost pro subscription.