Slack AI

AI-powered search, summaries, and workflows built into Slack

Grammarly

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

Slack AI

Strong

20/25

Grammarly

Strong

17/25

Score Breakdown

DimensionSlack AIGrammarly

Data Residency

Where is your data stored and processed?

Slack AI: Slack offers data residency in the US, EU, and Asia Pacific regions. Enterprise Grid customers can choose where their data is stored at rest.

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

4/5

Slack offers data residency in the US, EU, and Asia Pacific regions. Enterprise Grid customers can choose where their data is stored at rest.

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?

Slack AI: Incorporated in Delaware, US. As a Salesforce subsidiary, subject to US laws including the CLOUD Act. Offers EU data processing agreements and Standard Contractual Clauses.

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

3/5

Incorporated in Delaware, US. As a Salesforce subsidiary, subject to US laws including the CLOUD Act. Offers EU data processing agreements and Standard Contractual Clauses.

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?

Slack AI: Administrators can configure custom data retention policies. Enterprise Grid offers granular retention controls. Data can be exported and deleted on request.

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

4/5

Administrators can configure custom data retention policies. Enterprise Grid offers granular retention controls. Data can be exported and deleted on request.

4/5

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

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Slack AI: Comprehensive certification portfolio including SOC 2 Type II, SOC 3, ISO 27001, ISO 27017, ISO 27018, ISO 27701, and ISO 42001. One of the most thoroughly certified collaboration platforms.

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

5/5

Comprehensive certification portfolio including SOC 2 Type II, SOC 3, ISO 27001, ISO 27017, ISO 27018, ISO 27701, and ISO 42001. One of the most thoroughly certified collaboration platforms.

5/5

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

Regulatory Fit

Suitability for regulated industries and professional services

Slack AI: Supports GDPR, CCPA, HIPAA, FINRA, and FedRAMP compliance. Enterprise Grid plan includes features for regulated industries including eDiscovery and data loss prevention.

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

4/5

Supports GDPR, CCPA, HIPAA, FINRA, and FedRAMP compliance. Enterprise Grid plan includes features for regulated industries including eDiscovery and data loss prevention.

4/5

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

Total Score

20/25

17/25

Best For

Slack 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 organisations requiring broad certification coverage (SOC 2 Type II, SOC 3, ISO 27001); privacy-conscious teams who need strong data retention controls.

Detailed Comparison

Grammarly vs Slack 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. Slack AI (Salesforce, US) scores 20/25 with a Silver (Strong) trust badge. AI-powered search, summaries, and workflows built into Slack.

Dimension-by-Dimension Breakdown

#### Data Residency

Slack AI leads with 4/5 vs 2/5.

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

●Slack AI (4/5): Slack offers data residency in the US, EU, and Asia Pacific regions. Enterprise Grid customers can choose where their data is stored at rest.

#### Legal Jurisdiction

Slack AI leads with 3/5 vs 2/5.

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

●Slack AI (3/5): Incorporated in Delaware, US. As a Salesforce subsidiary, subject to US laws including the CLOUD Act. Offers EU data processing agreements and Standard Contractual Clauses.

#### Data Retention & Training

Both score equally at 4/5.

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

●Slack AI (4/5): Administrators can configure custom data retention policies. Enterprise Grid offers granular retention controls. Data can be exported and deleted on request.

#### Certifications

Both score equally at 5/5.

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

●Slack AI (5/5): Comprehensive certification portfolio including SOC 2 Type II, SOC 3, ISO 27001, ISO 27017, ISO 27018, ISO 27701, and ISO 42001. One of the most thoroughly certified collaboration platforms.

#### Regulatory Fit

Both score equally at 4/5.

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

●Slack AI (4/5): Supports GDPR, CCPA, HIPAA, FINRA, and FedRAMP compliance. Enterprise Grid plan includes features for regulated industries including eDiscovery and data loss prevention.

Certifications at a Glance

Certification	Grammarly	Slack AI
ISO 27001	Yes	Yes
ISO 27017	No	Yes
ISO 27018	Yes	Yes
ISO 27701	Yes	Yes
ISO 42001	Yes	No
SOC 2 Type II	Yes	Yes
SOC 3	No	Yes

Overall Verdict

Slack AI has a clear trust advantage, scoring 20/25 compared to Grammarly's 17/25. Slack AI particularly excels in data residency, legal jurisdiction.

Frequently Asked Questions

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

Slack AI has a TrustKit score of 20/25 while Grammarly scores 17/25. Slack AI currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Slack AI and Grammarly compare on data residency?

Slack AI scores 4/5 for data residency (Slack offers data residency in the US, EU, and Asia Pacific regions. Enterprise Grid customers can choose where their data is stored at rest.), while Grammarly scores 2/5 (Data hosted exclusively in US AWS East; no EU or regional residency option).

Are Slack AI and Grammarly GDPR compliant?

Both tools are assessed across five compliance dimensions. Slack AI 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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