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Legal Research

AI-powered case law, statute, and regulation research tools. These platforms go beyond keyword search — they understand legal concepts, validate citations, and surface relevant authority you might miss with traditional research methods.

What to look for: Citation accuracy is non-negotiable. A research tool that hallucinates case citations is worse than useless — it's malpractice risk. Check Shepard's/KeyCite integration, jurisdiction coverage, and whether the AI distinguishes between binding and persuasive authority.

8 tools in this category

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Paid

Lexis+ AI

Conversational AI legal research with Shepard's citation validation and access to the full LexisNexis database.

4.6

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Paid

CoCounsel

Thomson Reuters AI research assistant with Deep Research agentic capability, included in Westlaw Advantage.

4.5

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Paid

Casetext

AI legal research assistant, now part of Thomson Reuters, powering CoCounsel's capabilities.

4.3

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Custom

vLex Vincent AI

Global legal AI with access to 850M+ court records across US, UK, EU, Latin America, and Asia-Pacific.

4.2

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Free

Fastcase

AI-enhanced legal research platform, free through bar association memberships in many US states.

3.8

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Custom

Legora

AI legal research platform with a focus on accuracy and citation checking for mid-size to large firms.

3.8

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Custom

ai.law

Court-ready AI for litigation research, specializing in motion drafting and case analysis.

3.7

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Discontinued

ROSS Intelligence

Pioneering AI legal research platform (discontinued). Historical reference for the legal AI market.

3.5

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