Writer

Full-stack enterprise AI platform for content and workflows

Microsoft Copilot

AI assistant embedded across Microsoft 365 apps

Writer

Strong

17/25

Microsoft Copilot

Strong

20/25

Score Breakdown

DimensionWriterMicrosoft Copilot

Data Residency

Where is your data stored and processed?

Writer: Primary hosting in the US with EU data residency options available for Enterprise customers. Standard cloud infrastructure.

Microsoft Copilot: Microsoft offers data residency across multiple global regions including US, EU, UK, and Asia Pacific. Customers can select their data location and data stays within the Microsoft 365 compliance boundary.

3/5

Primary hosting in the US with EU data residency options available for Enterprise customers. Standard cloud infrastructure.

4/5

Microsoft offers data residency across multiple global regions including US, EU, UK, and Asia Pacific. Customers can select their data location and data stays within the Microsoft 365 compliance boundary.

Legal Jurisdiction

Which laws govern the company and your data?

Writer: US-incorporated (Delaware) entity. Subject to US law including CLOUD Act. Offers contractual protections and DPAs for EU customers.

Microsoft Copilot: Incorporated in Washington State, US. Subject to US laws including the CLOUD Act. Microsoft has challenged government data requests and offers EU Data Boundary commitments.

3/5

US-incorporated (Delaware) entity. Subject to US law including CLOUD Act. Offers contractual protections and DPAs for EU customers.

3/5

Incorporated in Washington State, US. Subject to US laws including the CLOUD Act. Microsoft has challenged government data requests and offers EU Data Boundary commitments.

Data Retention & Training

Is your data used for model training?

Writer: Clear data retention policies. Customer data is not used for model training. Enterprise agreements provide additional data handling controls.

Microsoft Copilot: Copilot interactions inherit Microsoft 365 retention policies. Administrators have granular control over data retention, deletion, and eDiscovery. Copilot prompts and responses are stored in Exchange Online.

4/5

Clear data retention policies. Customer data is not used for model training. Enterprise agreements provide additional data handling controls.

4/5

Copilot interactions inherit Microsoft 365 retention policies. Administrators have granular control over data retention, deletion, and eDiscovery. Copilot prompts and responses are stored in Exchange Online.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Writer: SOC 2 Type II certified with HIPAA compliance available. Strong enterprise security posture with regular third-party audits.

Microsoft Copilot: One of the most extensively certified cloud platforms globally, holding SOC 1/2 Type II, ISO 27001, ISO 27018, ISO 27701, FedRAMP High, and dozens of additional certifications across regions and industries.

4/5

SOC 2 Type II certified with HIPAA compliance available. Strong enterprise security posture with regular third-party audits.

5/5

One of the most extensively certified cloud platforms globally, holding SOC 1/2 Type II, ISO 27001, ISO 27018, ISO 27701, FedRAMP High, and dozens of additional certifications across regions and industries.

Regulatory Fit

Suitability for regulated industries and professional services

Writer: Good fit for US-regulated industries including healthcare (HIPAA). EU organizations should evaluate US jurisdiction implications. Proprietary models provide better data control than third-party model dependencies.

Microsoft Copilot: Supports a vast range of regulatory frameworks including GDPR, HIPAA, FedRAMP, FERPA, and many industry-specific requirements. Government cloud offerings available for public sector customers.

3/5

Good fit for US-regulated industries including healthcare (HIPAA). EU organizations should evaluate US jurisdiction implications. Proprietary models provide better data control than third-party model dependencies.

4/5

Supports a vast range of regulatory frameworks including GDPR, HIPAA, FedRAMP, FERPA, and many industry-specific requirements. Government cloud offerings available for public sector customers.

Total Score

17/25

20/25

Best For

Writer

Best for organisations requiring broad certification coverage (SOC 1 Type II, SOC 2 Type II, ISO 27001); privacy-conscious teams who need strong data retention controls.

Microsoft Copilot

Best for privacy-conscious teams who need strong data retention controls.

Detailed Comparison

Microsoft Copilot vs Writer: Trust & Compliance Comparison

Microsoft Copilot (Microsoft, US) scores 20/25 overall with a Silver (Strong) trust badge. AI assistant embedded across Microsoft 365 apps. Writer (Writer, US) scores 17/25 with a Silver (Strong) trust badge. Full-stack enterprise AI platform for content and workflows.

Dimension-by-Dimension Breakdown

#### Data Residency

Microsoft Copilot leads with 4/5 vs 3/5.

●Microsoft Copilot (4/5): Microsoft offers data residency across multiple global regions including US, EU, UK, and Asia Pacific. Customers can select their data location and data stays within the Microsoft 365 compliance boundary.

●Writer (3/5): Primary hosting in the US with EU data residency options available for Enterprise customers. Standard cloud infrastructure.

#### Legal Jurisdiction

Both score equally at 3/5.

●Microsoft Copilot (3/5): Incorporated in Washington State, US. Subject to US laws including the CLOUD Act. Microsoft has challenged government data requests and offers EU Data Boundary commitments.

●Writer (3/5): US-incorporated (Delaware) entity. Subject to US law including CLOUD Act. Offers contractual protections and DPAs for EU customers.

#### Data Retention & Training

Both score equally at 4/5.

●Microsoft Copilot (4/5): Copilot interactions inherit Microsoft 365 retention policies. Administrators have granular control over data retention, deletion, and eDiscovery. Copilot prompts and responses are stored in Exchange Online.

●Writer (4/5): Clear data retention policies. Customer data is not used for model training. Enterprise agreements provide additional data handling controls.

#### Certifications

Microsoft Copilot leads with 5/5 vs 4/5.

●Microsoft Copilot (5/5): One of the most extensively certified cloud platforms globally, holding SOC 1/2 Type II, ISO 27001, ISO 27018, ISO 27701, FedRAMP High, and dozens of additional certifications across regions and industries.

●Writer (4/5): SOC 2 Type II certified with HIPAA compliance available. Strong enterprise security posture with regular third-party audits.

#### Regulatory Fit

Microsoft Copilot leads with 4/5 vs 3/5.

●Microsoft Copilot (4/5): Supports a vast range of regulatory frameworks including GDPR, HIPAA, FedRAMP, FERPA, and many industry-specific requirements. Government cloud offerings available for public sector customers.

●Writer (3/5): Good fit for US-regulated industries including healthcare (HIPAA). EU organizations should evaluate US jurisdiction implications. Proprietary models provide better data control than third-party model dependencies.

Certifications at a Glance

Certification	Microsoft Copilot	Writer
FedRAMP High	Yes	No
HIPAA	No	Yes
ISO 27001	Yes	No
ISO 27018	Yes	No
ISO 27701	Yes	No
SOC 1 Type II	Yes	No
SOC 2 Type II	Yes	Yes

Overall Verdict

Microsoft Copilot has a clear trust advantage, scoring 20/25 compared to Writer's 17/25. Microsoft Copilot particularly excels in data residency, certifications, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Writer or Microsoft Copilot?

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

How do Writer and Microsoft Copilot compare on data residency?

Writer scores 3/5 for data residency (Primary hosting in the US with EU data residency options available for Enterprise customers. Standard cloud infrastructure.), while Microsoft Copilot scores 4/5 (Microsoft offers data residency across multiple global regions including US, EU, UK, and Asia Pacific. Customers can select their data location and data stays within the Microsoft 365 compliance boundary.).

Are Writer and Microsoft Copilot GDPR compliant?

Both tools are assessed across five compliance dimensions. Writer has a regulatory fit score of 3/5 and Microsoft Copilot scores 4/5. Check the full comparison above for a detailed breakdown.

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