Best Legal Research Database: Westlaw vs. Lexis+

"Best legal research database" is one of the most search-heavy queries in legal, and most of what ranks for it is a sponsored list ordering Westlaw and Lexis+ by whoever's affiliate program pays best. Both are legitimate — the mistake is treating this as a single ranked list instead of a fit decision based on your practice area and existing practice management system.

Westlaw — $500/mo

Westlaw is the long-standing case law, statutes, and secondary-source research database with KeyCite citator analysis. It integrates with Clio Manage, which makes it the natural pick for firms already running Clio as their practice management platform. At $500/mo it's $20/mo more than Lexis+ — a trivial difference that shouldn't drive the decision.

Lexis+ — $480/mo

Lexis+ covers the same core job — case law, statutes, secondary sources — with Shepard's citation analysis instead of KeyCite. It integrates with Clio Manage. At $480/mo it's marginally cheaper than Westlaw, but the real reason to pick Lexis+ over Westlaw is practice-area depth: certain practice areas (notably tax and securities regulation) have stronger secondary-source coverage on Lexis, while others (notably litigation) lean Westlaw.

How to actually pick

Start with the research work, not the brand

A litigation team and a tax advisory practice can both need authoritative case law, statutes, and citator treatment, yet spend most of their time in very different secondary materials. That is why a generic feature checklist is a poor opening move. List the matters that consumed research time during the last several weeks, separate primary-law retrieval from commentary and analysis, and note where an attorney had to leave the database to finish the answer. The better platform is the one that shortens the work your firm repeats, not the one with the longer marketing page.

Run the same research exercises in both systems. Use a closed matter so the expected authorities are already known, then compare search formulation, filters, citator signals, document history, and the path from a promising result to the controlling material. Include a junior researcher and a senior reviewer. A platform that feels fast to an experienced user can still create training drag for a new associate, while an interface that looks simpler can hide the depth a specialist needs. Record the steps and judgment calls rather than relying on which demo felt more polished.

Treat citation analysis as a workflow decision

Westlaw pairs its library with KeyCite; Lexis+ pairs its library with Shepard's. Both serve the essential job of showing how an authority has been treated, but firms develop habits around flags, histories, citing references, and the way reviewers document that a citation check was completed. A switch therefore affects more than search. It changes the review routine embedded in research memos, briefs, and supervision. Before choosing, ask each trial user to trace one authority forward, explain the treatment, and produce the same internal note the firm would keep in a live file.

The most dangerous failure mode is false confidence created by familiarity. A lawyer may prefer the platform learned in school even when the firm's present practice mix points elsewhere. The opposite failure is chasing a small subscription difference while ignoring retraining and inconsistent citation-check habits. Make the decision at the practice-group level if the work genuinely differs, but keep one default database wherever possible. Running both across the whole firm duplicates spend and makes research methods harder to standardize.

Check the handoff into matter management

Both options list a Clio Manage connection, so integration is not a simple tie-breaker. The practical test is whether attorneys can save documents to the correct matter, preserve useful naming and context, and avoid downloading files into personal folders before uploading them again. Confirm how research time is captured and how links or copies behave when another attorney opens the matter later. A nominal connection that the team bypasses is not an operational advantage. The winning workflow is the one people will actually follow under deadline pressure.

Use a controlled selection process

Choose a representative set of research tasks, assign the same users to both trials, and agree on evaluation criteria before sales demonstrations begin. Weight practice-area coverage, citator clarity, secondary-source usefulness, export and matter-filing steps, and training burden. Then review contract scope: content packages can matter as much as the platform name, so verify that the materials used during the trial are included in the quoted subscription. A strong demo on content excluded from the final package creates an avoidable surprise after launch.

Once selected, designate a research lead to document search conventions, citation-check expectations, and the route for requesting materials that are not in the package. Schedule a post-launch review after the team has handled real matters, not just training examples. If attorneys still maintain parallel free-search habits or repeatedly ask for missing sources, solve the package or training problem before adding another full database. The disciplined outcome is one platform aligned with the firm's work and one consistent research standard.

The practical takeaway

Westlaw is the stronger starting point for a litigation-heavy firm that values its KeyCite-centered workflow and litigation secondary materials. Lexis+ deserves the lead for tax, securities, or regulatory work where its cited secondary coverage better matches the daily docket. For a mixed practice, a structured trial using actual matters should decide. The small monthly difference is not enough to override practice fit, training continuity, and a research process the whole firm can audit and repeat. That discipline keeps the final decision focused on repeatable legal work.