Lexis+ AI

Hallucination-free AI legal research with authoritative LexisNexis sources

Perplexity AI

AI-powered answer engine that searches the web and cites its sources

Lexis+ AI

Strong

21/25

Perplexity AI

Moderate

15/25

Score Breakdown

DimensionLexis+ AIPerplexity 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.

Perplexity AI: US-based AWS infrastructure; no regional data residency options currently

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.

2/5

US-based AWS infrastructure; no regional data residency options currently

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.

Perplexity AI: US Delaware corporation subject to CLOUD Act; GDPR compliance via DPA

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 subject to CLOUD Act; GDPR compliance via DPA

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.

Perplexity AI: Enterprise plans offer zero data retention; no use of enterprise data for AI training

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.

5/5

Enterprise plans offer zero data retention; no use of enterprise data for AI training

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.

Perplexity AI: SOC 2 Type II certified; HIPAA BAA available for enterprise

4/5

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

3/5

SOC 2 Type II certified; HIPAA BAA available for enterprise

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.

Perplexity AI: Strong for research-focused business use; US hosting limits EU data residency suitability

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.

3/5

Strong for research-focused business use; US hosting limits EU data residency suitability

Total Score

21/25

15/25

Best For

Lexis+ 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.

Perplexity AI

Best for privacy-conscious teams who need strong data retention controls; teams on a tight budget.

Detailed Comparison

Lexis+ AI vs Perplexity AI: Trust & Compliance Comparison

Lexis+ AI (LexisNexis, GB) scores 21/25 overall with a Silver (Strong) trust badge. Hallucination-free AI legal research with authoritative LexisNexis sources. Perplexity AI (Perplexity AI, Inc., US) scores 15/25 with a Bronze (Moderate) trust badge. AI-powered answer engine that searches the web and cites its sources.

Dimension-by-Dimension Breakdown

#### Data Residency

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

●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.

●Perplexity AI (2/5): US-based AWS infrastructure; no regional data residency options currently

#### Legal Jurisdiction

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

●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.

●Perplexity AI (2/5): US Delaware corporation subject to CLOUD Act; GDPR compliance via DPA

#### Data Retention & Training

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

●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.

●Perplexity AI (5/5): Enterprise plans offer zero data retention; no use of enterprise data for AI training

#### Certifications

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

●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.

●Perplexity AI (3/5): SOC 2 Type II certified; HIPAA BAA available for enterprise

#### Regulatory Fit

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

●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.

●Perplexity AI (3/5): Strong for research-focused business use; US hosting limits EU data residency suitability

Certifications at a Glance

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

Overall Verdict

Lexis+ AI has a clear trust advantage, scoring 21/25 compared to Perplexity AI's 15/25. Lexis+ AI particularly excels in data residency, legal jurisdiction, certifications, regulatory fit.

Frequently Asked Questions

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

Lexis+ AI has a TrustKit score of 21/25 while Perplexity AI scores 15/25. Lexis+ AI currently rates higher across data residency, legal jurisdiction, data retention, certifications, and regulatory fit.

How do Lexis+ AI and Perplexity 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 Perplexity AI scores 2/5 (US-based AWS infrastructure; no regional data residency options currently).

Are Lexis+ AI and Perplexity AI GDPR compliant?

Both tools are assessed across five compliance dimensions. Lexis+ AI has a regulatory fit score of 5/5 and Perplexity AI scores 3/5. Check the full comparison above for a detailed breakdown.

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