Glean

Enterprise AI search that connects and searches all company knowledge with strict access controls

Google NotebookLM

AI research assistant that reasons over your own documents and sources

Glean

Moderate

16/25

Google NotebookLM

Strong

17/25

Score Breakdown

DimensionGleanGoogle NotebookLM

Data Residency

Where is your data stored and processed?

Glean: AWS-hosted with US and EU options; data residency configurations available for regulated industries on request; permission-enforcement architecture prevents cross-tenant data exposure

Google NotebookLM: Free tier uses US data centres. Enterprise Workspace customers can select EU data regions, providing compliant data residency for European businesses. Consumer accounts have limited regional controls.

3/5

AWS-hosted with US and EU options; data residency configurations available for regulated industries on request; permission-enforcement architecture prevents cross-tenant data exposure

3/5

Free tier uses US data centres. Enterprise Workspace customers can select EU data regions, providing compliant data residency for European businesses. Consumer accounts have limited regional controls.

Legal Jurisdiction

Which laws govern the company and your data?

Glean: US Delaware corporation subject to US jurisdiction and CLOUD Act; DPAs available for GDPR; Capital One Ventures as investor may raise considerations for some financial services organisations

Google NotebookLM: Google LLC is incorporated in Delaware, US. Subject to the CLOUD Act. Google has signed SCCs and model DPAs for enterprise Workspace customers, providing some mitigation, but US jurisdiction remains a fundamental risk.

2/5

US Delaware corporation subject to US jurisdiction and CLOUD Act; DPAs available for GDPR; Capital One Ventures as investor may raise considerations for some financial services organisations

2/5

Google LLC is incorporated in Delaware, US. Subject to the CLOUD Act. Google has signed SCCs and model DPAs for enterprise Workspace customers, providing some mitigation, but US jurisdiction remains a fundamental risk.

Data Retention & Training

Is your data used for model training?

Glean: Customer data not used to train foundational AI models; strict permission mirroring ensures data is only surfaced to authorised users; comprehensive audit logs and configurable retention policies

Google NotebookLM: Enterprise Workspace accounts: notebooks and data not used for model training under DPA. Configurable retention and deletion. Free consumer accounts: less certain. Enterprise controls are significantly stronger.

4/5

Customer data not used to train foundational AI models; strict permission mirroring ensures data is only surfaced to authorised users; comprehensive audit logs and configurable retention policies

4/5

Enterprise Workspace accounts: notebooks and data not used for model training under DPA. Configurable retention and deletion. Free consumer accounts: less certain. Enterprise controls are significantly stronger.

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Glean: SOC 2 Type II certified; HIPAA BAA available; GDPR compliant with DPA; no ISO 27001 publicly confirmed

Google NotebookLM: Google's cloud infrastructure holds ISO 27001, ISO 27017, ISO 27018, SOC 2 Type II, and BSI C5 (Germany). Among the most comprehensively certified cloud providers. NotebookLM for Business inherits these certifications via Workspace.

3/5

SOC 2 Type II certified; HIPAA BAA available; GDPR compliant with DPA; no ISO 27001 publicly confirmed

5/5

Google's cloud infrastructure holds ISO 27001, ISO 27017, ISO 27018, SOC 2 Type II, and BSI C5 (Germany). Among the most comprehensively certified cloud providers. NotebookLM for Business inherits these certifications via Workspace.

Regulatory Fit

Suitability for regulated industries and professional services

Glean: Permission-enforcement architecture, HIPAA BAA, audit logs, and data residency options make Glean well-suited to large regulated enterprises; US jurisdiction is the primary limitation for EU-sovereignty-focused buyers

Google NotebookLM: Enterprise Workspace deployment with EU data region provides an acceptable compliance posture for most EU businesses. For regulated industries (financial services, healthcare), additional due diligence on Google's CLOUD Act exposure is required.

4/5

Permission-enforcement architecture, HIPAA BAA, audit logs, and data residency options make Glean well-suited to large regulated enterprises; US jurisdiction is the primary limitation for EU-sovereignty-focused buyers

3/5

Enterprise Workspace deployment with EU data region provides an acceptable compliance posture for most EU businesses. For regulated industries (financial services, healthcare), additional due diligence on Google's CLOUD Act exposure is required.

Total Score

16/25

17/25

Best For

Glean

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

Google NotebookLM

Best for organisations requiring broad certification coverage (ISO 27001, ISO 27017, ISO 27018); privacy-conscious teams who need strong data retention controls; teams on a tight budget.

Detailed Comparison

Glean vs Google NotebookLM: Trust & Compliance Comparison

Glean (Glean, US) scores 16/25 overall with a Bronze (Moderate) trust badge. Enterprise AI search that connects and searches all company knowledge with strict access controls. Google NotebookLM (Google, US) scores 17/25 with a Silver (Strong) trust badge. AI research assistant that reasons over your own documents and sources.

Dimension-by-Dimension Breakdown

#### Data Residency

Both score equally at 3/5.

●Glean (3/5): AWS-hosted with US and EU options; data residency configurations available for regulated industries on request; permission-enforcement architecture prevents cross-tenant data exposure

●Google NotebookLM (3/5): Free tier uses US data centres. Enterprise Workspace customers can select EU data regions, providing compliant data residency for European businesses. Consumer accounts have limited regional controls.

#### Legal Jurisdiction

Both score equally at 2/5.

●Glean (2/5): US Delaware corporation subject to US jurisdiction and CLOUD Act; DPAs available for GDPR; Capital One Ventures as investor may raise considerations for some financial services organisations

●Google NotebookLM (2/5): Google LLC is incorporated in Delaware, US. Subject to the CLOUD Act. Google has signed SCCs and model DPAs for enterprise Workspace customers, providing some mitigation, but US jurisdiction remains a fundamental risk.

#### Data Retention & Training

Both score equally at 4/5.

●Glean (4/5): Customer data not used to train foundational AI models; strict permission mirroring ensures data is only surfaced to authorised users; comprehensive audit logs and configurable retention policies

●Google NotebookLM (4/5): Enterprise Workspace accounts: notebooks and data not used for model training under DPA. Configurable retention and deletion. Free consumer accounts: less certain. Enterprise controls are significantly stronger.

#### Certifications

Google NotebookLM leads with 5/5 vs 3/5.

●Glean (3/5): SOC 2 Type II certified; HIPAA BAA available; GDPR compliant with DPA; no ISO 27001 publicly confirmed

●Google NotebookLM (5/5): Google's cloud infrastructure holds ISO 27001, ISO 27017, ISO 27018, SOC 2 Type II, and BSI C5 (Germany). Among the most comprehensively certified cloud providers. NotebookLM for Business inherits these certifications via Workspace.

#### Regulatory Fit

Glean leads with 4/5 vs 3/5.

●Glean (4/5): Permission-enforcement architecture, HIPAA BAA, audit logs, and data residency options make Glean well-suited to large regulated enterprises; US jurisdiction is the primary limitation for EU-sovereignty-focused buyers

●Google NotebookLM (3/5): Enterprise Workspace deployment with EU data region provides an acceptable compliance posture for most EU businesses. For regulated industries (financial services, healthcare), additional due diligence on Google's CLOUD Act exposure is required.

Certifications at a Glance

Certification	Glean	Google NotebookLM
C5	No	Yes
ISO 27001	No	Yes
ISO 27017	No	Yes
ISO 27018	No	Yes
SOC 2 Type II	Yes	Yes

Overall Verdict

Glean and Google NotebookLM 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, Glean or Google NotebookLM?

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

How do Glean and Google NotebookLM compare on data residency?

Glean scores 3/5 for data residency (AWS-hosted with US and EU options; data residency configurations available for regulated industries on request; permission-enforcement architecture prevents cross-tenant data exposure), while Google NotebookLM scores 3/5 (Free tier uses US data centres. Enterprise Workspace customers can select EU data regions, providing compliant data residency for European businesses. Consumer accounts have limited regional controls.).

Are Glean and Google NotebookLM GDPR compliant?

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

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