Duden-Mentor
Duden-Mentor: A focused German writing assistant with strong business integrations and clear annual pricing. Ranked #14 of 88 in Grammar Checkers by our editors (7.3/10); pricing: Free plan; best for german-language business proofreading.
At a glance
- Editor score7.3 / 10
- PricingFree plan
- Best forGerman-language business proofreading
- Free planYes
- Facts checked20 Sep 2026
Where it wins
- Checks spelling, grammar, punctuation, style, readability and repetition.
- Works across web, Windows, macOS, Word and major browsers.
- Offers team licensing and REST API integration for business systems.
Where it doesn't
- Business pricing is billed annually, with 19% VAT added.
- Language coverage is focused on German-language writing.
- The 1–4 license tier costs more per user than larger tiers.
Our verdict on Duden-Mentor
Duden-Mentor is a German-language digital writing assistant for individuals and businesses. It checks spelling, grammar, punctuation, style and readability, while also identifying filler words and repetition. Writers can receive synonym suggestions, use a thesaurus, maintain a personal dictionary and apply regional settings for Germany, Austria and Switzerland. The product is available through the web, Windows, macOS, Chrome, Firefox, Edge and Microsoft Word, with business access to a REST API. It suits German-speaking teams that want proofreading across everyday writing environments rather than a general-purpose multilingual checker.
Pricing is structured around a free plan and annual business licenses. The published business tiers list €8.30 per user per month for 1–4 licenses, €6.40 for 5–10 licenses and €5.50 for 11–25 licenses, with 19% VAT added. The smaller tier includes person-bound, device-independent licensing, while the larger tiers use volume-discounted licensing. Premium capabilities include larger text limits, expanded style suggestions, personal dictionaries and AI-assisted rewriting and correction suggestions. The tier structure favors teams that can commit annually and benefit from volume pricing.
Its strongest differentiator is the combination of detailed German writing feedback and broad access options. Browser extensions cover Chrome, Firefox and Edge, the Microsoft Word add-in brings checking into document workflows, and the REST API can connect the service with business systems. Style and readability checks go beyond basic spelling correction, while regional settings help tailor German usage to Germany, Austria or Switzerland. Choose Duden-Mentor for German business proofreading across web, desktop, Word and browser workflows. Consider an alternative if multilingual coverage or mobile applications is central to the buying decision.
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Duden-Mentor pricing
Duden-Mentor fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Browser extension | Yes |
| Desktop app | No |
| Mobile app | No |
| Style suggestions | Yes |
| Tone detection | Not verified |
| Languages supported | Not verified |
| Deployment | Cloud, Browser extension |
| Platforms | Web, Windows, macOS, Chrome extension |
| Compliance & security | GDPR |
| Support | Email, Phone, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 4 integrations: Microsoft Word, Google Chrome, Mozilla Firefox, Microsoft Edge |
| Pricing | Free plan (source) |
| Website | mentor.duden.de |
| Facts checked | 20 Sep 2026 |
Duden-Mentor integrations
Duden-Mentor lists 4 integrations on its own site.
- Microsoft Word
- Google Chrome
- Mozilla Firefox
- Microsoft Edge
Alternatives to Duden-Mentor
- GrammarlyA broad writing assistant with strong grammar, tone, rewriting, and AI coverage.9.4
- LanguageToolA broad multilingual checker with open-source and self-hosting options.9.2
- Microsoft EditorA strong Microsoft 365 writing assistant with focused platform coverage.9.0
See all Duden-Mentor alternatives →
Also Ranked In
Duden-Mentor is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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