Grammarly

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

Writesonic

AI content platform for SEO, marketing, and brand visibility

Grammarly

Strong

17/25

Writesonic

Moderate

12/25

Score Breakdown

DimensionGrammarlyWritesonic

Data Residency

Where is your data stored and processed?

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

Writesonic: Data hosted in the US. No EU-specific data residency options documented. Standard US cloud infrastructure.

2/5

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

2/5

Data hosted in the US. No EU-specific data residency options documented. Standard US cloud infrastructure.

Legal Jurisdiction

Which laws govern the company and your data?

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

Writesonic: US-incorporated (Delaware) entity subject to US law including CLOUD Act. Standard DPA and privacy policies available.

2/5

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

2/5

US-incorporated (Delaware) entity subject to US law including CLOUD Act. Standard DPA and privacy policies available.

Data Retention & Training

Is your data used for model training?

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

Writesonic: Content stored in user accounts with standard retention policies. Claims not to train on user content. SOC 2 certified for data handling.

4/5

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

3/5

Content stored in user accounts with standard retention policies. Claims not to train on user content. SOC 2 certified for data handling.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

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

Writesonic: SOC 2 certified with GDPR and HIPAA compliance claims. Adequate for standard business use but missing ISO certifications.

5/5

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

3/5

SOC 2 certified with GDPR and HIPAA compliance claims. Adequate for standard business use but missing ISO certifications.

Regulatory Fit

Suitability for regulated industries and professional services

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

Writesonic: Suitable for general marketing and business use. HIPAA compliance claimed for healthcare content. US jurisdiction limits suitability for EU-regulated organizations.

4/5

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

2/5

Suitable for general marketing and business use. HIPAA compliance claimed for healthcare content. US jurisdiction limits suitability for EU-regulated organizations.

Total Score

17/25

12/25

Best For

Grammarly

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.

Writesonic

Best for teams that prioritise data retention & training (scores 3/5) and need a bronze-tier tool.

Detailed Comparison

Grammarly vs Writesonic: Trust & Compliance Comparison

Grammarly (Grammarly, Inc., US) scores 17/25 overall with a Silver (Strong) trust badge. AI writing assistant for grammar, style, clarity, and generative content creation. Writesonic (Writesonic, US) scores 12/25 with a Bronze (Moderate) trust badge. AI content platform for SEO, marketing, and brand visibility.

Dimension-by-Dimension Breakdown

#### Data Residency

Both score equally at 2/5.

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

●Writesonic (2/5): Data hosted in the US. No EU-specific data residency options documented. Standard US cloud infrastructure.

#### Legal Jurisdiction

Both score equally at 2/5.

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

●Writesonic (2/5): US-incorporated (Delaware) entity subject to US law including CLOUD Act. Standard DPA and privacy policies available.

#### Data Retention & Training

Grammarly leads with 4/5 vs 3/5.

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

●Writesonic (3/5): Content stored in user accounts with standard retention policies. Claims not to train on user content. SOC 2 certified for data handling.

#### Certifications

Grammarly leads with 5/5 vs 3/5.

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

●Writesonic (3/5): SOC 2 certified with GDPR and HIPAA compliance claims. Adequate for standard business use but missing ISO certifications.

#### Regulatory Fit

Grammarly leads with 4/5 vs 2/5.

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

●Writesonic (2/5): Suitable for general marketing and business use. HIPAA compliance claimed for healthcare content. US jurisdiction limits suitability for EU-regulated organizations.

Certifications at a Glance

Certification	Grammarly	Writesonic
ISO 27001	Yes	No
ISO 27018	Yes	No
ISO 27701	Yes	No
ISO 42001	Yes	No
SOC 2	No	Yes
SOC 2 Type II	Yes	No

Overall Verdict

Grammarly has a clear trust advantage, scoring 17/25 compared to Writesonic's 12/25. Grammarly particularly excels in data retention & training, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Grammarly or Writesonic?

Grammarly has a TrustKit score of 17/25 while Writesonic scores 12/25. Grammarly currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Grammarly and Writesonic 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 Writesonic scores 2/5 (Data hosted in the US. No EU-specific data residency options documented. Standard US cloud infrastructure.).

Are Grammarly and Writesonic GDPR compliant?

Both tools are assessed across five compliance dimensions. Grammarly has a regulatory fit score of 4/5 and Writesonic scores 2/5. Check the full comparison above for a detailed breakdown.

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