Grammarly

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

Compose AI

AI writing autocomplete Chrome extension that speeds up everyday writing

Grammarly

Strong

17/25

Compose AI

Caution

8/25

Score Breakdown

DimensionGrammarlyCompose AI

Data Residency

Where is your data stored and processed?

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

Compose AI: Text input processed on US-based cloud servers. No EU data residency option.

2/5

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

2/5

Text input processed on US-based cloud servers. No EU data residency option.

Legal Jurisdiction

Which laws govern the company and your data?

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

Compose AI: US entity. Subject to US jurisdiction and CLOUD Act. No EU legal entity or GDPR DPA.

2/5

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

2/5

US entity. Subject to US jurisdiction and CLOUD Act. No EU legal entity or GDPR DPA.

Data Retention & Training

Is your data used for model training?

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

Compose AI: Extension processes text input through cloud servers. Personalisation features imply some data retention. Limited transparency on data handling.

4/5

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

2/5

Extension processes text input through cloud servers. Personalisation features imply some data retention. Limited transparency on data handling.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

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

Compose AI: No security certifications publicly disclosed. Consumer-focused extension without enterprise security posture.

5/5

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

1/5

No security certifications publicly disclosed. Consumer-focused extension without enterprise security posture.

Regulatory Fit

Suitability for regulated industries and professional services

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

Compose AI: Consumer browser extension not suitable for regulated environments. Broad browser permissions required. No enterprise compliance features.

4/5

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

1/5

Consumer browser extension not suitable for regulated environments. Broad browser permissions required. No enterprise compliance features.

Total Score

17/25

8/25

Best For

Grammarly

Best for teams on a tight budget.

Compose AI

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; enterprises requiring SSO integration.

Detailed Comparison

Compose AI vs Grammarly: Trust & Compliance Comparison

Compose AI (Compose AI, US) scores 8/25 overall with a Review Required (Caution) trust badge. AI writing autocomplete Chrome extension that speeds up everyday writing. 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

Both score equally at 2/5.

●Compose AI (2/5): Text input processed on US-based cloud servers. No EU data residency option.

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

#### Legal Jurisdiction

Both score equally at 2/5.

●Compose AI (2/5): US entity. Subject to US jurisdiction and CLOUD Act. No EU legal entity or GDPR DPA.

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

#### Data Retention & Training

Grammarly leads with 4/5 vs 2/5.

●Compose AI (2/5): Extension processes text input through cloud servers. Personalisation features imply some data retention. Limited transparency on data handling.

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

#### Certifications

Grammarly leads with 5/5 vs 1/5.

●Compose AI (1/5): No security certifications publicly disclosed. Consumer-focused extension without enterprise security posture.

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

#### Regulatory Fit

Grammarly leads with 4/5 vs 1/5.

●Compose AI (1/5): Consumer browser extension not suitable for regulated environments. Broad browser permissions required. No enterprise compliance features.

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

Certifications at a Glance

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

Overall Verdict

Grammarly has a clear trust advantage, scoring 17/25 compared to Compose AI's 8/25. Grammarly particularly excels in data retention & training, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Grammarly or Compose AI?

Grammarly has a TrustKit score of 17/25 while Compose AI scores 8/25. Grammarly currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Grammarly and Compose AI 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 Compose AI scores 2/5 (Text input processed on US-based cloud servers. No EU data residency option.).

Are Grammarly and Compose AI GDPR compliant?

Both tools are assessed across five compliance dimensions. Grammarly has a regulatory fit score of 4/5 and Compose AI scores 1/5. Check the full comparison above for a detailed breakdown.

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