DeepL vs Grammarly
Which should you use? A side-by-side look at what each one does, who it suits, what it costs, how hard it is to set up, and where each falls short.
AI tool · Freemium
AI translation and writing improvement for text and documents.
AI tool · Freemium
A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers.
Our verdict
DeepL is primarily a translation tool that also rewrites text, and it is strongest when you need to turn text or whole documents from one language into another with natural-sounding results. Grammarly is primarily a writing assistant that checks grammar, clarity and tone in whatever you type, across many apps and browsers. They overlap on rephrasing, but they serve different core jobs, so the right choice depends mostly on whether your work involves translation.
Pick DeepL if you need to translate text or documents between languages and want high-quality, natural-sounding output.
Pick Grammarly if you want everyday proofreading and tone checks on emails and other writing in English across your apps.
| Key difference | DeepL | Grammarly |
|---|---|---|
| Core purpose | Translation of text and documents, plus writing improvement | Writing assistant for grammar, clarity and tone |
| Best at | High-quality translation and translating whole documents | Proofreading everyday writing and tone checks on emails |
| Where it works | Web, desktop, mobile, Chrome, and an API | Web, Chrome, desktop, mobile, working across apps via extension |
| Extras | Glossaries and DeepL Write for rephrasing | Tone detection and generative rewrites |
| Price model | Freemium | Freemium |
Written with AI from both products' catalogue entries · updated 2026-10-29
Who each one is for
Choose DeepL if you need…
- High-quality translation
- Translating whole documents
Choose Grammarly if you need…
- Proofreading everyday writing
- Tone checks on emails
Side-by-side
| DeepL | Grammarly | |
|---|---|---|
| Type | Writing · Translation | Writing · Editing & grammar |
| Price | Freemium | Freemium |
| Platforms | Web, macOS, Windows, iOS, Android, Chrome, API | Web, Chrome, macOS, Windows, iOS, Android |
| Works with | Chrome, Microsoft 365 | Chrome, Google Workspace, Microsoft 365 |
| Hands-on tested by us | Not yet | Not yet |
| Last checked | 2026-10-29 | 2026-10-29 |
What each one is
DeepL
AI translation and writing improvement for text and documents. Often among the most natural-sounding translators. Have a native speaker review anything legal, medical or customer-facing.
Grammarly
A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers. Catches errors wherever you type. Suggestions can flatten a distinctive voice; accept them selectively.
Best for
DeepL
- High-quality translation
- Translating whole documents
Grammarly
- Proofreading everyday writing
- Tone checks on emails
Strengths
DeepL
- Text and document translation
- Glossaries
- DeepL Write for rephrasing
- Translation API
Grammarly
- Grammar and clarity suggestions
- Tone detection
- Generative rewrites
- Works across apps via extension
Frequently asked questions
Should I use DeepL or Grammarly?
DeepL is primarily a translation tool that also rewrites text, and it is strongest when you need to turn text or whole documents from one language into another with natural-sounding results. Grammarly is primarily a writing assistant that checks grammar, clarity and tone in whatever you type, across many apps and browsers. They overlap on rephrasing, but they serve different core jobs, so the right choice depends mostly on whether your work involves translation. Pick DeepL if you need to translate text or documents between languages and want high-quality, natural-sounding output. Pick Grammarly if you want everyday proofreading and tone checks on emails and other writing in English across your apps.
What is the difference between DeepL and Grammarly?
DeepL: AI translation and writing improvement for text and documents. Grammarly: A writing assistant for grammar, clarity and tone, with generative AI features, working across many apps and browsers. DeepL suits high-quality translation, while Grammarly suits proofreading everyday writing.
Are DeepL and Grammarly free?
DeepL: Freemium. Grammarly: Freemium.
What are other alternatives to DeepL and Grammarly?
Other options people compare them with include LanguageTool, ProWritingAid, QuillBot, Wordtune, Hemingway Editor.
Keep comparing
Built from our catalogue entries for both products: open-source details come from each project's README (AI-assisted, refreshed weekly) and GitHub data; AI-tool details are editorial. Spotted something wrong? Let us know from either product's page.