Grammarly

AI writing assistant for grammar, style, clarity, and generative content creation

DeepL

High-accuracy AI translation for documents and text in 30+ language pairs

Grammarly

Strong

17/25

DeepL

Excellent

25/25

Score Breakdown

DimensionGrammarlyDeepL

Data Residency

Where is your data stored and processed?

Grammarly: Data hosted exclusively in US AWS East; no EU or regional residency option

DeepL: EU processing by default on AWS; explicit Data Residency add-on available for US and JP

2/5

Data hosted exclusively in US AWS East; no EU or regional residency option

5/5

EU processing by default on AWS; explicit Data Residency add-on available for US and JP

Legal Jurisdiction

Which laws govern the company and your data?

Grammarly: US Delaware corporation subject to CLOUD Act; GDPR compliance via SCCs and DPA

DeepL: German company under EU law; strong GDPR alignment; BSI C5 attestation

2/5

US Delaware corporation subject to CLOUD Act; GDPR compliance via SCCs and DPA

5/5

German company under EU law; strong GDPR alignment; BSI C5 attestation

Data Retention & Training

Is your data used for model training?

Grammarly: User data not sold; limited processing for product improvement with user controls

DeepL: Pro tier texts deleted immediately after translation; no use for AI training

4/5

User data not sold; limited processing for product improvement with user controls

5/5

Pro tier texts deleted immediately after translation; no use for AI training

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Grammarly: Extensive certification: SOC 2 Type II, ISO 27001/18/701, ISO 42001

DeepL: SOC 2 Type II, ISO 27001, BSI C5 Type 2, and HIPAA certified

5/5

Extensive certification: SOC 2 Type II, ISO 27001/18/701, ISO 42001

5/5

SOC 2 Type II, ISO 27001, BSI C5 Type 2, and HIPAA certified

Regulatory Fit

Suitability for regulated industries and professional services

Grammarly: Strong enterprise compliance posture; US-only hosting limits suitability for EU data residency mandates

DeepL: Excellent fit for EU-regulated industries including legal, pharma, and financial services

4/5

Strong enterprise compliance posture; US-only hosting limits suitability for EU data residency mandates

5/5

Excellent fit for EU-regulated industries including legal, pharma, and financial services

Total Score

17/25

25/25

Best For

Grammarly

Best for EU-headquartered organisations needing maximum data sovereignty; organisations requiring broad certification coverage (SOC 2 Type II, ISO 27001, BSI C5 Type 2); regulated industries (ICO, BaFin); privacy-conscious teams who need strong data retention controls; teams on a tight budget.

DeepL

Best for organisations requiring broad certification coverage (SOC 2 Type II, ISO 27001, ISO 27018); privacy-conscious teams who need strong data retention controls; teams on a tight budget.

Detailed Comparison

DeepL vs Grammarly: Trust & Compliance Comparison

DeepL (DeepL SE, DE) scores 25/25 overall with a Gold (Excellent) trust badge. High-accuracy AI translation for documents and text in 30+ language pairs. Grammarly (Grammarly, Inc., US) scores 17/25 with a Silver (Strong) trust badge. AI writing assistant for grammar, style, clarity, and generative content creation.

Dimension-by-Dimension Breakdown

#### Data Residency

DeepL leads with 5/5 vs 2/5.

●DeepL (5/5): EU processing by default on AWS; explicit Data Residency add-on available for US and JP

●Grammarly (2/5): Data hosted exclusively in US AWS East; no EU or regional residency option

#### Legal Jurisdiction

DeepL leads with 5/5 vs 2/5.

●DeepL (5/5): German company under EU law; strong GDPR alignment; BSI C5 attestation

●Grammarly (2/5): US Delaware corporation subject to CLOUD Act; GDPR compliance via SCCs and DPA

#### Data Retention & Training

DeepL leads with 5/5 vs 4/5.

●DeepL (5/5): Pro tier texts deleted immediately after translation; no use for AI training

●Grammarly (4/5): User data not sold; limited processing for product improvement with user controls

#### Certifications

Both score equally at 5/5.

●DeepL (5/5): SOC 2 Type II, ISO 27001, BSI C5 Type 2, and HIPAA certified

●Grammarly (5/5): Extensive certification: SOC 2 Type II, ISO 27001/18/701, ISO 42001

#### Regulatory Fit

DeepL leads with 5/5 vs 4/5.

●DeepL (5/5): Excellent fit for EU-regulated industries including legal, pharma, and financial services

●Grammarly (4/5): Strong enterprise compliance posture; US-only hosting limits suitability for EU data residency mandates

Certifications at a Glance

Certification	DeepL	Grammarly
BSI C5 Type 2	Yes	No
HIPAA	Yes	No
ISO 27001	Yes	Yes
ISO 27018	No	Yes
ISO 27701	No	Yes
ISO 42001	No	Yes
SOC 2 Type II	Yes	Yes

Overall Verdict

DeepL has a clear trust advantage, scoring 25/25 compared to Grammarly's 17/25. DeepL particularly excels in data residency, legal jurisdiction, data retention & training, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Grammarly or DeepL?

Grammarly has a TrustKit score of 17/25 while DeepL scores 25/25. DeepL currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Grammarly and DeepL compare on data residency?

Grammarly scores 2/5 for data residency (Data hosted exclusively in US AWS East; no EU or regional residency option), while DeepL scores 5/5 (EU processing by default on AWS; explicit Data Residency add-on available for US and JP).

Are Grammarly and DeepL GDPR compliant?

Both tools are assessed across five compliance dimensions. Grammarly has a regulatory fit score of 4/5 and DeepL scores 5/5. Check the full comparison above for a detailed breakdown.

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