How this stack is chosen
Legal buyers start with privilege, not features. Harvey is the quote-based enterprise platform for firms and in-house teams. Spellbook is Word-native contract review and drafting. CoCounsel Legal is Thomson Reuters’ Westlaw- and Practical Law-grounded assistant; the only official dollar figure recorded here is Westlaw Advantage with CoCounsel Essentials starting at $415.35/month. Consumer chat tiers are the wrong place for client-identifiable files. Verify every citation in a primary research product before advice or filing.
The shortlist
Harvey
4.3/5 editorialAn enterprise legal AI platform for law firms and in-house teams. Official pages route buyers to a demo and describe security controls such as SAML SSO, audit logs, and data lifecycle management. It is not a substitute for licensed legal judgment.
Spellbook
4.2/5 editorialA Word-native AI product for commercial contract review and drafting. Official pages describe redlines against your standards, drafting in Word, and vendor confidentiality controls. Pricing is not published as a self-serve checkout list.
CoCounsel Legal
4.3/5 editorialThomson Reuters’ legal AI assistant grounded in Westlaw content and Practical Law guidance. Official product pages describe research, analysis, and drafting; an official Westlaw plans page lists a starting price for the Westlaw Advantage with CoCounsel Essentials bundle.
Claude
4.7/5 editorialA thoughtful assistant especially useful for editing, long-context analysis, and turning messy notes into structured outputs.
Perplexity
4.6/5 editorialA research-first AI search engine that keeps sources visible while answering questions.
Microsoft Copilot
4.5/5 editorialMicrosoft’s AI assistant for workplace productivity, search, writing, meetings, and enterprise software workflows.
Before you pay for anything
Run each finalist's trial checklist on one real task. Record time-to-result, corrections needed, and what the plan actually costs at your volume — then decide. Our free scorecard gives you the template.
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