ChatGPT

AI assistant by OpenAI for conversation, analysis, and content creation

Grammarly

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

ChatGPT

Moderate

16/25

Grammarly

Strong

17/25

Score Breakdown

DimensionChatGPTGrammarly

Data Residency

Where is your data stored and processed?

ChatGPT: Enterprise/Business customers can choose from 10+ regional data residency options including EU and UK

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

3/5

Enterprise/Business customers can choose from 10+ regional data residency options including EU and UK

2/5

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

Legal Jurisdiction

Which laws govern the company and your data?

ChatGPT: US Delaware corporation, subject to CLOUD Act; DPAs available for GDPR

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

2/5

US Delaware corporation, subject to CLOUD Act; DPAs available for GDPR

2/5

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

Data Retention & Training

Is your data used for model training?

ChatGPT: Free/Plus tiers may train on data; Business and Enterprise tiers exclude data from training by default

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

3/5

Free/Plus tiers may train on data; Business and Enterprise tiers exclude data from training by default

4/5

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

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

ChatGPT: SOC 2 Type II, ISO 27001/17/18/701 certified

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

4/5

SOC 2 Type II, ISO 27001/17/18/701 certified

5/5

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

Regulatory Fit

Suitability for regulated industries and professional services

ChatGPT: Enterprise plan with regional residency and DPA suitable for regulated industries

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

4/5

Enterprise plan with regional residency and DPA suitable for regulated industries

4/5

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

Total Score

16/25

17/25

Best For

ChatGPT

Best for organisations requiring broad certification coverage (SOC 2 Type II, ISO 27001, ISO 27017); teams on a tight budget.

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.

Detailed Comparison

ChatGPT vs Grammarly: Trust & Compliance Comparison

ChatGPT (OpenAI, US) scores 16/25 overall with a Bronze (Moderate) trust badge. AI assistant by OpenAI for conversation, analysis, and content creation. 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

ChatGPT leads with 3/5 vs 2/5.

●ChatGPT (3/5): Enterprise/Business customers can choose from 10+ regional data residency options including EU and UK

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

#### Legal Jurisdiction

Both score equally at 2/5.

●ChatGPT (2/5): US Delaware corporation, subject to CLOUD Act; DPAs available for GDPR

●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 3/5.

●ChatGPT (3/5): Free/Plus tiers may train on data; Business and Enterprise tiers exclude data from training by default

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

#### Certifications

Grammarly leads with 5/5 vs 4/5.

●ChatGPT (4/5): SOC 2 Type II, ISO 27001/17/18/701 certified

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

#### Regulatory Fit

Both score equally at 4/5.

●ChatGPT (4/5): Enterprise plan with regional residency and DPA suitable for regulated industries

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

Certifications at a Glance

Certification	ChatGPT	Grammarly
ISO 27001	Yes	Yes
ISO 27017	Yes	No
ISO 27018	Yes	Yes
ISO 27701	Yes	Yes
ISO 42001	No	Yes
SOC 2 Type II	Yes	Yes

Overall Verdict

ChatGPT and Grammarly are closely matched on trust and compliance, with scores of 16/25 and 17/25 respectively. The right choice depends on your specific regulatory requirements and existing technology stack.

Frequently Asked Questions

Which is better for EU compliance, ChatGPT or Grammarly?

ChatGPT has a TrustKit score of 16/25 while Grammarly scores 17/25. Grammarly currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do ChatGPT and Grammarly compare on data residency?

ChatGPT scores 3/5 for data residency (Enterprise/Business customers can choose from 10+ regional data residency options including EU and UK), while Grammarly scores 2/5 (Data hosted exclusively in US AWS East; no EU or regional residency option).

Are ChatGPT and Grammarly GDPR compliant?

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

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