Lexis+ AI

Hallucination-free AI legal research with authoritative LexisNexis sources

Harvey AI

AI assistant built for legal professionals

Lexis+ AI

Strong

21/25

Harvey AI

Strong

17/25

Score Breakdown

DimensionLexis+ AIHarvey AI

Data Residency

Where is your data stored and processed?

Lexis+ AI: Data hosted across US, EU, and UK data centres. Strong data residency options for law firms in major common law and civil law jurisdictions. UK GDPR compliance post-Brexit.

Harvey AI: US/EU hosting via Azure

4/5

Data hosted across US, EU, and UK data centres. Strong data residency options for law firms in major common law and civil law jurisdictions. UK GDPR compliance post-Brexit.

3/5

US/EU hosting via Azure

Legal Jurisdiction

Which laws govern the company and your data?

Lexis+ AI: Parent company RELX PLC is UK/EU incorporated and regulated. LexisNexis US entity is incorporated in Delaware but operates under RELX's broader European governance framework, providing strong data protection oversight.

Harvey AI: US Delaware corporation

4/5

Parent company RELX PLC is UK/EU incorporated and regulated. LexisNexis US entity is incorporated in Delaware but operates under RELX's broader European governance framework, providing strong data protection oversight.

2/5

US Delaware corporation

Data Retention & Training

Is your data used for model training?

Lexis+ AI: Clear data retention policies aligned with legal professional requirements. Research queries and documents are not retained for AI training. Supports data processing agreements for enterprise law firms.

Harvey AI: No training on client data; strict data isolation

4/5

Clear data retention policies aligned with legal professional requirements. Research queries and documents are not retained for AI training. Supports data processing agreements for enterprise law firms.

4/5

No training on client data; strict data isolation

Certifications

ISO 27001, SOC 2, Cyber Essentials, etc.

Lexis+ AI: Holds SOC 2 Type II, ISO 27001, and ISO 27701 certifications. Strong certification portfolio appropriate for a platform handling confidential legal information.

Harvey AI: SOC 2 Type II, ISO 27001

4/5

Holds SOC 2 Type II, ISO 27001, and ISO 27701 certifications. Strong certification portfolio appropriate for a platform handling confidential legal information.

4/5

SOC 2 Type II, ISO 27001

Regulatory Fit

Suitability for regulated industries and professional services

Lexis+ AI: Excellent regulatory fit for law firms and legal departments. Compliance with bar association professional responsibility rules, GDPR, UK GDPR, and CCPA. Trusted by government agencies and Am Law 100 firms.

Harvey AI: SRA-suitable; used by Magic Circle and elite law firms

5/5

Excellent regulatory fit for law firms and legal departments. Compliance with bar association professional responsibility rules, GDPR, UK GDPR, and CCPA. Trusted by government agencies and Am Law 100 firms.

4/5

SRA-suitable; used by Magic Circle and elite law firms

Total Score

21/25

17/25

Best For

Lexis+ AI

Best for regulated industries (SRA); privacy-conscious teams who need strong data retention controls.

Harvey AI

Best for EU-headquartered organisations needing maximum data sovereignty; organisations requiring broad certification coverage (SOC 2 Type II, ISO 27001, ISO 27701); regulated industries (FCA, SRA); privacy-conscious teams who need strong data retention controls.

Detailed Comparison

Harvey AI vs Lexis+ AI: Trust & Compliance Comparison

Harvey AI (Harvey AI, Inc., US) scores 17/25 overall with a Silver (Strong) trust badge. AI assistant built for legal professionals. Lexis+ AI (LexisNexis, GB) scores 21/25 with a Silver (Strong) trust badge. Hallucination-free AI legal research with authoritative LexisNexis sources.

Dimension-by-Dimension Breakdown

#### Data Residency

Lexis+ AI leads with 4/5 vs 3/5.

●Harvey AI (3/5): US/EU hosting via Azure

●Lexis+ AI (4/5): Data hosted across US, EU, and UK data centres. Strong data residency options for law firms in major common law and civil law jurisdictions. UK GDPR compliance post-Brexit.

#### Legal Jurisdiction

Lexis+ AI leads with 4/5 vs 2/5.

●Harvey AI (2/5): US Delaware corporation

●Lexis+ AI (4/5): Parent company RELX PLC is UK/EU incorporated and regulated. LexisNexis US entity is incorporated in Delaware but operates under RELX's broader European governance framework, providing strong data protection oversight.

#### Data Retention & Training

Both score equally at 4/5.

●Harvey AI (4/5): No training on client data; strict data isolation

●Lexis+ AI (4/5): Clear data retention policies aligned with legal professional requirements. Research queries and documents are not retained for AI training. Supports data processing agreements for enterprise law firms.

#### Certifications

Both score equally at 4/5.

●Harvey AI (4/5): SOC 2 Type II, ISO 27001

●Lexis+ AI (4/5): Holds SOC 2 Type II, ISO 27001, and ISO 27701 certifications. Strong certification portfolio appropriate for a platform handling confidential legal information.

#### Regulatory Fit

Lexis+ AI leads with 5/5 vs 4/5.

●Harvey AI (4/5): SRA-suitable; used by Magic Circle and elite law firms

●Lexis+ AI (5/5): Excellent regulatory fit for law firms and legal departments. Compliance with bar association professional responsibility rules, GDPR, UK GDPR, and CCPA. Trusted by government agencies and Am Law 100 firms.

Certifications at a Glance

Certification	Harvey AI	Lexis+ AI
ISO 27001	Yes	Yes
ISO 27701	No	Yes
SOC 2 Type II	Yes	Yes

Overall Verdict

Lexis+ AI has a clear trust advantage, scoring 21/25 compared to Harvey AI's 17/25. Lexis+ AI particularly excels in data residency, legal jurisdiction, regulatory fit.

Frequently Asked Questions

Which is better for EU compliance, Lexis+ AI or Harvey AI?

Lexis+ AI has a TrustKit score of 21/25 while Harvey AI scores 17/25. Lexis+ AI currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Lexis+ AI and Harvey AI compare on data residency?

Lexis+ AI scores 4/5 for data residency (Data hosted across US, EU, and UK data centres. Strong data residency options for law firms in major common law and civil law jurisdictions. UK GDPR compliance post-Brexit.), while Harvey AI scores 3/5 (US/EU hosting via Azure).

Are Lexis+ AI and Harvey AI GDPR compliant?

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

Explore Each Tool