Mistral AI

Open-weight European AI models for enterprise and sovereignty

Grammarly

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

Mistral AI

Excellent

24/25

Grammarly

Strong

17/25

Score Breakdown

DimensionMistral AIGrammarly

Data Residency

Where is your data stored and processed?

Mistral AI: Data hosted in the EU (France) with full on-premise and air-gapped deployment options. Ideal for European data sovereignty requirements.

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

5/5

Data hosted in the EU (France) with full on-premise and air-gapped deployment options. Ideal for European data sovereignty requirements.

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?

Mistral AI: French SAS entity subject to EU law. Full GDPR compliance with no exposure to US surveillance frameworks like CLOUD Act or FISA.

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

5/5

French SAS entity subject to EU law. Full GDPR compliance with no exposure to US surveillance frameworks like CLOUD Act or FISA.

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?

Mistral AI: Clear data retention policies. API inputs and outputs are not used for training. On-premise deployments give full control over data lifecycle.

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

4/5

Clear data retention policies. API inputs and outputs are not used for training. On-premise deployments give full control over data lifecycle.

4/5

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

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Mistral AI: Holds SOC 2 Type II, ISO 27001, and ISO 27701 certifications, demonstrating strong security and privacy management practices.

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

5/5

Holds SOC 2 Type II, ISO 27001, and ISO 27701 certifications, demonstrating strong security and privacy management practices.

5/5

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

Regulatory Fit

Suitability for regulated industries and professional services

Mistral AI: Excellent fit for EU-regulated industries. Compliant with GDPR and positioned well for EU AI Act requirements. On-premise option supports strict regulatory environments.

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

5/5

Excellent fit for EU-regulated industries. Compliant with GDPR and positioned well for EU AI Act requirements. On-premise option supports strict regulatory environments.

4/5

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

Total Score

24/25

17/25

Best For

Mistral 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.

Grammarly

Best for EU-headquartered organisations needing maximum data sovereignty; organisations requiring broad certification coverage (SOC 2 Type II, ISO 27001, ISO 27701); regulated industries (BaFin, ANSSI); privacy-conscious teams who need strong data retention controls; organisations that need self-hosted or on-premise deployment; teams on a tight budget.

Detailed Comparison

Grammarly vs Mistral AI: 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. Mistral AI (Mistral AI, FR) scores 24/25 with a Gold (Excellent) trust badge. Open-weight European AI models for enterprise and sovereignty.

Dimension-by-Dimension Breakdown

#### Data Residency

Mistral AI leads with 5/5 vs 2/5.

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

●Mistral AI (5/5): Data hosted in the EU (France) with full on-premise and air-gapped deployment options. Ideal for European data sovereignty requirements.

#### Legal Jurisdiction

Mistral AI leads with 5/5 vs 2/5.

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

●Mistral AI (5/5): French SAS entity subject to EU law. Full GDPR compliance with no exposure to US surveillance frameworks like CLOUD Act or FISA.

#### Data Retention & Training

Both score equally at 4/5.

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

●Mistral AI (4/5): Clear data retention policies. API inputs and outputs are not used for training. On-premise deployments give full control over data lifecycle.

#### Certifications

Both score equally at 5/5.

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

●Mistral AI (5/5): Holds SOC 2 Type II, ISO 27001, and ISO 27701 certifications, demonstrating strong security and privacy management practices.

#### Regulatory Fit

Mistral AI leads with 5/5 vs 4/5.

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

●Mistral AI (5/5): Excellent fit for EU-regulated industries. Compliant with GDPR and positioned well for EU AI Act requirements. On-premise option supports strict regulatory environments.

Certifications at a Glance

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

Overall Verdict

Mistral AI has a clear trust advantage, scoring 24/25 compared to Grammarly's 17/25. Mistral AI particularly excels in data residency, legal jurisdiction, regulatory fit.

Frequently Asked Questions

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

Mistral AI has a TrustKit score of 24/25 while Grammarly scores 17/25. Mistral AI currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Mistral AI and Grammarly compare on data residency?

Mistral AI scores 5/5 for data residency (Data hosted in the EU (France) with full on-premise and air-gapped deployment options. Ideal for European data sovereignty requirements.), while Grammarly scores 2/5 (Data hosted exclusively in US AWS East; no EU or regional residency option).

Are Mistral AI and Grammarly GDPR compliant?

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

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