Legal Data Infrastructure for the AI Era

Better legal output starts with better legal data. Lexsphere transforms judicial opinions into authentic, trusted, and enriched Legal Authority, continuously updated through ongoing court ingestion and synchronization to provide a more reliable foundation for legal AI and legal technology.

Judicial opinions from multiple courts transformed by the Lexsphere Proprietary Data System into continuously maintained Legal Authority powering legal AI and legal technology

Structured Legal Data at Scale

Lexsphere has built and maintains a large-scale U.S. legal data system, including one of the most comprehensive independent case law libraries available.

Comprehensive U.S. Court Coverage

Coverage across federal and state courts, including the U.S. Supreme Court, all Federal Circuit Courts, Federal District Courts, state appellate courts, bankruptcy courts, and tribal courts.

U.S. Court Coverage by Federal Circuit

1st Circuit
2nd Circuit
3rd Circuit
4th Circuit
5th Circuit
6th Circuit
7th Circuit
8th Circuit
9th Circuit
10th Circuit
11th Circuit
D.C. Circuit
Federal Circuit
ME
Maine
NH
New Hampshire
MA
Massachusetts
RI
Rhode Island
PR
Puerto Rico
VT
Vermont
CT
Connecticut
NY
New York
PA
Pennsylvania
NJ
New Jersey
DE
Delaware
VI
Virgin Islands
MD
Maryland
VA
Virginia
WV
West Virginia
NC
North Carolina
SC
South Carolina
TX
Texas
LA
Louisiana
MS
Mississippi
MI
Michigan
OH
Ohio
KY
Kentucky
TN
Tennessee
WI
Wisconsin
IL
Illinois
IN
Indiana
MN
Minnesota
IA
Iowa
MO
Missouri
AR
Arkansas
ND
North Dakota
SD
South Dakota
NE
Nebraska
WA
Washington
OR
Oregon
CA
California
NV
Nevada
ID
Idaho
MT
Montana
AZ
Arizona
AK
Alaska
HI
Hawaii
GU
Guam
MP
N. Mariana Islands
WY
Wyoming
UT
Utah
CO
Colorado
KS
Kansas
OK
Oklahoma
NM
New Mexico
AL
Alabama
GA
Georgia
FL
Florida
DC
District of Columbia
FC
Federal Circuit
Patent, International Trade, Federal Claims

Coverage

All 50 states and federal courts

400+

Courts

124M+

Citation References

Daily

Updates

Lexsphere Proprietary Data System

The Lexsphere Proprietary Data System transforms judicial opinions into authentic, trusted, and enriched Legal Authority through continuous court ingestion, synchronization, citation linking, and data enrichment. The result is a continuously maintained legal data foundation for AI, legal technology, and professional legal applications.

Case Law Corpus

8M+ legal opinions across 400+ courts, continuously updated.

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Update & Synchronization Infrastructure

Continuously updated legal data supported by automated synchronization and ingestion processes.

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Legal Authority

Applications that help organizations verify legal citations, monitor legal authority, and audit legal workflows.

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Lexsphere Legal Authority

Applications built on the Lexsphere Proprietary Data System that help organizations verify, monitor, and trust legal authority.

Legal Brief Validation Icon

Legal Brief Validation

Validates legal citations, verifies quoted authority, and identifies hallucinated or unsupported citations within legal documents.

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Case Status Verification Icon

Case Status Verification

Continuously monitors new court decisions and identifies changes to legal authority, including cases that have been overruled, limited, or otherwise affected by subsequent decisions.

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Activity Tracking Icon

Activity Tracking and Auditing

Provides a complete audit trail of user activity, validation history, and workflow events to support governance, compliance, and defensibility.

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Lexsphere Proprietary Data System

1

Court Acquisition

2

Ingestion

3

Structuring

4

Citation Linking

5

Synchronization

The Lexsphere Proprietary Data System transforms judicial opinions into authentic, trusted, and enriched Legal Authority through continuous court ingestion, synchronization, citation linking, and data enrichment. The result is a continuously maintained legal data foundation for legal AI and legal technology.

Flexible Enterprise Delivery

APIs

Access structured legal data, citation-linking systems, and verification tools through enterprise APIs.

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Hosted Infrastructure

Deploy Lexsphere services through standalone hosted environments with minimal integration overhead.

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Explore Lexsphere

Legal data infrastructure for modern legal technology and AI-assisted systems.