11.1 Legal research platforms

Legal research platforms give you access to massive databases of case law, statutes, regulations, and secondary sources. Knowing which platform to use, and how to use it well, is a core skill in modern legal practice. This section covers the major platforms, their key features, search techniques, and how to research cost-effectively and ethically.

Types of Legal Research Platforms

Legal research platforms fall into two main categories: subscription-based vs. free, and general vs. specialized. Choosing the right type depends on what you're researching, how deep you need to go, and what budget you're working with.

Subscription-based vs. Free Platforms

Subscription-based platforms (Westlaw, LexisNexis, Bloomberg Law) charge a fee but offer significant advantages:

• Extensive, regularly updated databases covering primary and secondary sources
• Built-in citators that tell you whether a case is still good law
• Advanced search tools, analytics, and filtering options

Free platforms provide access to legal information at no cost, but with trade-offs:

• Government-sponsored sites (congress.gov, state legislature websites, court PACER/CM-ECF systems) provide official primary law
• Public legal information institutes (like Cornell's LII) offer free case law and statutes
• Coverage tends to be narrower, updates may lag, and analytical tools are minimal or absent

General vs. Specialized Databases

General databases cover a wide range of legal topics and jurisdictions. They're your starting point for most research tasks, especially when you're exploring an unfamiliar area of law.

Specialized databases focus on a particular practice area or document type. For example, a tax-specific database will offer deeper coverage, expert commentary, specialized forms, and practice tools that a general platform can't match. Other common specializations include intellectual property, securities, and immigration law.

Key Legal Research Platforms

Each major platform has distinct strengths. You don't need to memorize every feature, but you should understand what sets them apart so you can pick the right tool for a given task.

Westlaw

Owned by Thomson Reuters, Westlaw is one of the two dominant legal research platforms. Its distinguishing features include:

• KeyCite: Westlaw's citator system, which uses colored flags to signal whether a case has been overruled, distinguished, or positively cited
• West Key Number System: A taxonomy that assigns unique numbers to specific legal concepts, letting you find cases on the same legal issue across all jurisdictions
• Extensive secondary source library, including practice materials and analytical content

LexisNexis

LexisNexis is Westlaw's primary competitor and offers comparably broad coverage. Key differentiators:

• Shepard's Citations: The original citator service, providing detailed treatment analysis of cases and statutes
• Exclusive access to Matthew Bender treatises and practice guides
• LexisNexis Headnotes: A classification system for organizing legal concepts within cases (similar in function to West's Key Numbers, but using a different taxonomy)

Bloomberg Law

Bloomberg Law stands out by combining legal research with business and financial data. This makes it especially useful for transactional attorneys and corporate practice:

• Comprehensive federal and state court docket coverage
• Access to Bloomberg BNA expert analysis across regulatory areas
• AI-powered brief analyzer and litigation analytics tools
• Strong integration of business intelligence with legal research

Fastcase

Fastcase offers a more affordable alternative, with solid coverage of primary law:

• Interactive Timeline: A visual tool that maps search results chronologically, helping you see how the law has developed
• Free access through many state and local bar association memberships
• Bad Law Bot: Flags cases that have received negative treatment
• Integration with HeinOnline for law review access

Casetext

Casetext has leaned heavily into AI-driven research tools:

• CoCounsel (formerly CARA A.I.): Analyzes uploaded briefs and suggests relevant authorities you may have missed
• SmartCite: A citator that checks whether your authorities are still valid
• Parallel Search: Finds cases with similar fact patterns to yours
• Crowdsourced annotations from legal professionals add context to cases

Note: Casetext was acquired by Thomson Reuters in 2023, so its integration with Westlaw's ecosystem may continue to evolve.

Features of Research Platforms

Regardless of which platform you use, certain core features appear across most of them. Understanding these features will make your research faster and more reliable.

Full-Text Searching

Full-text searching lets you search the entire text of documents, not just titles or summaries. This is powerful because relevant language often appears deep within an opinion or statute. Most platforms let you filter results by jurisdiction, date range, court level, or document type to narrow things down.

Citators and Shepardizing

A citator tells you whether a legal authority is still good law. The two major citators are:

• Shepard's Citations (LexisNexis): The original; "Shepardizing" a case means checking its validity here
• KeyCite (Westlaw): Uses a flag system (red, yellow, green) to signal treatment

Both services show you every subsequent case that has cited your authority, categorized by whether the treatment was positive, negative, or neutral. This lets you trace how a legal principle has developed over time and find related authorities.

Headnotes and Key Numbers

When editors at West (or LexisNexis) review a new opinion, they write headnotes: short summaries of each distinct legal point the case addresses. Each headnote is assigned a key number corresponding to a specific legal topic.

The practical payoff: if you find one good case on your issue, you can click its key number and instantly pull up every other case classified under that same topic, across all jurisdictions.

Document Delivery Options

All major platforms let you print, download, or email documents. Beyond that, most offer:

• Custom folders or workspaces for organizing research by project or client
• Integration with citation managers and word processors
• Secure sharing options for sending research to colleagues or clients

Advanced Search Techniques

Knowing how to construct precise searches saves enormous amounts of time. These techniques work across most platforms, though exact syntax may vary slightly.

Boolean Operators

Boolean operators are logical connectors that combine search terms:

• AND: Narrows results. Both terms must appear. Example: "negligence AND duty"
• OR: Broadens results. Either term can appear. Example: "automobile OR vehicle"
• NOT: Excludes results containing a term. Example: "damages NOT punitive"
• Parentheses group terms to control logic: (negligence OR malpractice) AND hospital

Proximity Searches

Proximity operators find terms that appear near each other, which is more precise than a simple AND search:

• w/n (within n words, in order): "reasonable w/3 doubt" finds "reasonable doubt" and "reasonable grounds for doubt"
• /n (within n words, any order): "landlord /5 tenant" finds both terms within 5 words of each other regardless of which comes first

These are especially useful when you're looking for a legal concept that courts phrase in slightly different ways.

Field Searching

Field searching restricts your query to specific parts of a document, such as:

• Title or case name
• Judge or author
• Court or jurisdiction
• Date range

Combining field searches with Boolean or proximity operators creates highly targeted queries. For example, you could search for opinions by a specific judge in a specific court within a date range that also contain your key terms.

Natural Language vs. Terms and Connectors

Platforms typically offer two search modes:

Most experienced researchers start with natural language to get oriented, then switch to terms and connectors to zero in on specific authorities.

Secondary Sources in Platforms

Secondary sources don't create law, but they explain, analyze, and organize it. They're often the best place to start your research because they give you context before you dive into primary sources.

Legal Encyclopedias

Legal encyclopedias provide broad overviews of legal topics, organized alphabetically. The two major national encyclopedias are American Jurisprudence (Am. Jur. 2d) and Corpus Juris Secundum (C.J.S.). Both include citations to relevant cases and statutes, making them useful jumping-off points when you're unfamiliar with an area of law.

Law Reviews and Journals

Law reviews are scholarly publications with in-depth analysis of legal issues, written by professors, practitioners, and law students. They're particularly valuable for:

• Emerging legal trends and novel theories
• Detailed arguments on narrow legal questions
• Extensive footnotes that serve as research trails to primary sources

Treatises and Practice Guides

Treatises are comprehensive, multi-volume works on specific areas of law (e.g., Prosser on Torts, Corbin on Contracts). Practice guides are more hands-on, often including forms, checklists, and step-by-step procedural guidance. Both are written by recognized experts and updated regularly.

Statutory Research Tools

Statutory research requires tools that go beyond simply finding the text of a statute. You need to understand its context, its history, and whether it's still current.

Annotated Codes

An annotated code is a compilation of statutes that includes editorial additions: case summaries interpreting each section, cross-references to related statutes, references to regulations, and historical notes showing how the statute has been amended. Annotated codes on Westlaw (U.S.C.A.) and LexisNexis (U.S.C.S.) are among the most heavily used statutory research tools.

Legislative History Resources

Legislative history materials document why a statute was enacted and what the legislature intended. These include:

• Committee reports (often the most authoritative source of intent)
• Floor debates and hearing transcripts
• Different versions of a bill as it moved through the legislative process

Courts use legislative history to resolve ambiguities in statutory language, so knowing how to find these materials matters.

Statutory Updating Services

Statutes change. Updating services help you confirm you're working with the current version:

• Check for recent amendments or pending legislation
• Set up alerts for changes to statutes in your practice area
• Citator integration shows how courts have interpreted specific statutory provisions

Case Law Research Tools

Finding relevant case law and confirming it's still good law are two of the most fundamental legal research tasks.

Digest System

A digest is an organized collection of brief summaries (called digest paragraphs) of legal points from court opinions. Digests are arranged by topic and subtopic, so you can browse a specific area of law and find relevant cases across multiple jurisdictions. West publishes digests at the federal, regional, and state levels.

Headnote Classification

As described above, headnote classification systems (primarily West's Key Number System) assign standardized topic and key numbers to each legal point in a case. This creates a uniform index across all reported decisions, making it possible to find cases on the same issue regardless of jurisdiction or how the court phrased the rule.

Case Citators

Case citators (KeyCite, Shepard's, SmartCite) serve two critical functions:

1. Validation: Confirming that a case hasn't been overruled, reversed, or otherwise undermined
2. Research expansion: Finding later cases that cite your case, which often address the same legal issue and may provide additional support or distinguish the holding

Always citator-check your authorities before relying on them in any legal document.

Specialized Research Areas

Some research tasks require you to go beyond general case law and statutes into more specialized collections.

Regulatory and Administrative Materials

Federal agencies produce regulations (compiled in the Code of Federal Regulations, or CFR), proposed rules (published in the Federal Register), agency decisions, and guidance documents. Research platforms provide tools for tracking regulatory changes and searching agency-specific databases. State agencies produce analogous materials.

Forms and Practice Materials

Form libraries contain templates for contracts, pleadings, motions, and other legal documents. These typically include:

• Drafting notes explaining when and how to use each form
• Alternative clauses for different situations
• Guidance on filing procedures and compliance requirements

International and Comparative Law

For research involving foreign or international law, platforms provide access to treaties, international tribunal decisions, foreign statutes and case law, and secondary sources. Many include English translations of non-English materials. This area is growing in importance as legal practice becomes more global.

Cost-Effective Research Strategies

Legal research can be expensive. Developing a strategy that balances thoroughness with cost awareness is a practical skill you'll use throughout your career.

Flat-Rate vs. Transactional Pricing

• Flat-rate pricing: You pay a fixed fee for unlimited access to specified content. This encourages thorough research without worrying about per-search costs.
• Transactional pricing: You pay per search, document view, or download. This offers flexibility but can lead to unexpectedly high bills if you're not careful.

The right model depends on how much research you do. High-volume users benefit from flat-rate plans; occasional users may prefer transactional access.

Academic vs. Practitioner Access

Law students typically get broad platform access at heavily subsidized rates through their schools. Practitioner access costs significantly more but may include practice-specific tools. Some platforms offer alumni access programs that bridge the gap, so it's worth checking what's available as you transition from school to practice.

Free Alternatives to Paid Services

Before paying for access, check whether free resources can meet your needs:

• Government websites (congress.gov, state legislature sites, court websites) for primary law
• Google Scholar for case law searching (surprisingly capable, though it lacks citator tools)
• Public legal information institutes (Cornell LII, Justia) for statutes and case law
• Open access law journals for scholarly articles
• Bar association memberships that include Fastcase or Casemaker access

Evaluating Research Platforms

Not all platforms are equally suited to every task. When choosing or comparing platforms, consider these criteria.

Coverage and Comprehensiveness

• How broad is the database? Does it cover your jurisdiction and practice area?
• How far back does historical coverage go?
• How frequently is content updated?
• Does the platform include exclusive content you can't find elsewhere?

User Interface and Ease of Use

• Is the search interface intuitive?
• Are help resources and tutorials available?
• How fast are search results returned?
• Does the platform work well on different devices?

Integration with Other Tools

• Can you export citations to reference managers (e.g., Zotero)?
• Does the platform integrate with word processors for cite-checking or document drafting?
• Are there connections to practice management or time-tracking software?
• Does the platform offer an API for custom integrations?

Ethical Considerations

Using research platforms responsibly involves more than just finding the right answer. Several ethical obligations come into play.

Duty of Technological Competence

The ABA Model Rules (Comment 8 to Rule 1.1) require lawyers to stay current with the "benefits and risks associated with relevant technology." For legal research, this means you have an ethical obligation to understand how to use research platforms effectively, to keep up with changes in those tools, and to recognize their limitations.

Confidentiality in Online Research

When you search for legal issues online, your queries can reveal information about your client's situation. Protect confidentiality by:

• Avoiding client-identifying details in search queries
• Using secure networks (not public Wi-Fi) for research
• Being mindful of search histories stored by platforms
• Ensuring research results containing sensitive information are stored and transmitted securely

Citing to Online Sources

You're ethically obligated to provide accurate, verifiable citations. Online sources create specific challenges:

• Web content can change or disappear, so preserve copies (screenshots, PDFs, or archived versions via the Wayback Machine) of sources you cite
• Follow your jurisdiction's citation rules for online sources
• Exercise caution when citing non-traditional sources like blogs or social media
• Be transparent about the nature of AI-generated or crowd-sourced content if you rely on it

Future Trends

Legal research technology continues to evolve rapidly. Three trends are particularly worth watching.

Artificial Intelligence in Legal Research

AI is already reshaping legal research through natural language processing, predictive analytics, and tools that automatically identify relevant authorities. Platforms are increasingly using machine learning to improve search relevance and offer features like brief analysis and outcome prediction. The key challenge is ensuring these tools are accurate and free from bias, since AI systems can reflect the limitations of their training data.

Blockchain and Legal Databases

Blockchain technology has potential applications in legal records management, including secure, tamper-proof storage of legal documents and automated updating through smart contracts. These applications are still largely theoretical, but they could eventually change how legal databases verify and authenticate sources.

Open Access Legal Information

The open access movement advocates for free public access to legal materials. Initiatives to digitize historical legal documents and make court records freely available are gaining momentum. This trend puts pressure on commercial platforms' pricing models while raising questions about how to maintain the editorial quality and curation that paid services provide.