Duden-Mentor

7.3easy start · #33of 88
in Grammar checkers

Free trialno
Well documentedno
Runs where you workyes

Runs on Browser, Mac, Web, Windows. Paid plans from €2.99/mo.

Duden-Mentor is ranked #33 of 88 in grammar checkers on The Geeks Club. It runs on Browser extension, macOS, Web, Windows. There is a free plan. A free trial is offered. Paid plans start at €2.99/mo.

Duden-Mentor plans and pricing

All plans

Basis Free 10 Wörter im persönlichen Wörterbuch · 500 Zeichen ohne Benutzerkonto lp.mentor.duden.de · 11 Oct 2026

Pur €2.99/mo 35,88 € pro Jahr; jährliche Zahlweise, jährlich kündbar 10 Test-Korrekturen/Umformulierungen pro Monat duden.de · 11 Oct 2026

Premium €7.95/mo 95,40 € pro Jahr; jährliche Zahlung, jährlich kündbar 250 Textoptimierungen pro Monat · Browser-Erweiterung · Word-Add-in · persönliches Wörterbuch unbegrenzt duden.de · 11 Oct 2026

Premium Plus €9.95/mo 119,40 € pro Jahr; jährliche Zahlung, jährlich kündbar Unbegrenzte Textoptimierungen pro Monat · Browser-Erweiterung · Word-Add-in · persönliches Wörterbuch unbegrenzt duden.de · 11 Oct 2026

Compared on grammar checkers

Free plan: Yes
Browser extension: Yes
Desktop app: No
Mobile app: No
Style suggestions: Yes

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The record

Purpose: Duden-Mentor checks German text for spelling, grammar, punctuation and style and suggests corrections.
Writing suggestions: It identifies filler words, repeated words and overly long sentences and offers ways to improve style and readability.
Regional German: It supports country-specific writing variants for Germany, Austria and Switzerland.
Languages: The service checks German texts only.
Browser support: Browser extensions are available for Chrome, Firefox and Microsoft Edge.
Integrations: The Word add-in supports Microsoft Word for macOS from version 2016 and Windows from version 2019.
Online integrations: The browser plug-in works in text fields on services including Gmail, Web.de, GMX.de, Trello, Facebook and WordPress.
Security: The maker says texts are transmitted encrypted, are not used for AI training, and are deleted after checking.
Data hosting: The business product page states that texts are sent using TLS 1.2 and a 128-bit key to AWS servers contractually located in Frankfurt, Germany.
Support: The FAQ says Duden customer service can provide personal help if its answers do not resolve a question.
Usage requirement: The service requires an internet connection.
Business licensing: Business plans use annual per-user licenses, and prices for more than 25 licenses are available on request.
Maker: Duden is a brand of the Cornelsen Group.
Price from: €2.99/mo

Where it ranks on The Geeks Club

Best Grammar Checkers in 2026#33 of 88
Best Online Dictionaries in 2026#35 of 39

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Sources

lp.mentor.duden.de/b2b_1_int/· checked 11 Oct 2026
duden.de/service/abos· checked 11 Oct 2026
mentor.duden.de/browser-plug-in· checked 11 Oct 2026
mentor.duden.de/word-plug-in· checked 11 Oct 2026
duden.de/haeufige-fragen-zum-duden-schreibassist· checked 11 Oct 2026
duden.de/ueber_duden· checked 11 Oct 2026