Grammarly vs DeepL
Which tool to choose in 2026?
Texte📊 Comparison radar
Grammarly
DeepL
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📋 General information
Grammarly
Rating
★★★★☆ 4.3/5
Pricing
Freemium
Price detail
Free (basic corrections + 100 AI prompts) · Pro: $12/mo · Enterprise: custom pricing
Company
Grammarly
Launched
2009
Platforms
web, ios, android, api
DeepL
Rating
★★★★☆ 4.5/5
Pricing
Freemium
Price detail
Free (500K char./mo API) · Starter: $8.74/user/mo · Business: $68.99/user/mo
Company
DeepL
Launched
2017
Platforms
web, ios, android, api
✨ Features
| Feature | Grammarly | DeepL |
|---|---|---|
| Advanced AI grammar correction | ✅ | — |
| GrammarlyGO: AI generation/rewriting | ✅ | — |
| Plagiarism detection (16B+ pages) | ✅ | — |
| Enterprise Brand Voice | ✅ | — |
| Browser extension (500K+ sites) | ✅ | — |
| Full Office integration | ✅ | — |
| Translation in 37 languages (89% accuracy) | — | ✅ |
| DeepL Write (11 languages) | — | ✅ |
| DeepL Voice (real-time translation) | — | ✅ |
| Custom glossaries | — | ✅ |
| Full API (REST, SDKs in 5 languages) | — | ✅ |
| Document translation with formatting | — | ✅ |
⚖️ Pros & Cons
📗 Grammarly
- exceptional multi-platform coverage: works across 500,000+ apps and websites
- The most complete security certification stack in the category, including responsible AI and health data
- Industry standard: tens of millions of daily users and adopted by virtually all major enterprises
- Generous free plan with unlimited grammar corrections — rare in this category
- Option to opt out of AI training on your data, available to all users
- No EU hosting — all data goes through American servers
- No public API for developers — impossible to integrate Grammarly into your own tools
- French remains a second-class citizen: the tool excels in English but other languages lag behind
🌍 DeepL
- Translation accuracy significantly superior to Google for European languages — the best on the market
- Triple security certification with zero deviations and European cloud compliance
- Native EU hosting: Pro texts are never stored or used for training
- Complete suite: translation, rewriting, real-time voice translation and developer API
- Open-source SDKs in 5 languages for easy integration into your projects
- Only 37 languages versus 249+ at Google — insufficient for rare or Asian languages
- ~25% more expensive than Google Translate for API usage — the premium comes at a cost
- In the free version, your texts are stored and used to train the model
🏆 Verdict
📗 Choose Grammarly
The global standard for AI correction with an impressive security stack (6 ISO certifications), but the lack of EU hosting and public API are notable gaps.
🌍 Choose DeepL
The best AI translator with an exemplary trust profile (EU-hosted, triple certification). Premium justified by superior accuracy.
Grammarly
DeepL