🏆 Top AI tools for legal
Quick answer: CoCounsel and Harvey lead for large-firm research and drafting on primary law, and Spellbook is the practical pick for contract review inside Microsoft Word.
Selected by our editorial team based on breadth of use, relevance and current product capabilities. Not a paid placement. This page is general information, not legal advice.
CoCounsel Legal
Thomson Reuters’ AI legal assistant, built on the Westlaw primary-law database, for research, drafting and document review.
- Backed by Westlaw’s primary-law database, per our guide’s own comparison table
Harvey
Firm-wide AI assistant for large firms and in-house teams, covering research, contract analysis and litigation support.
- Adopted firm-wide by Latham & Watkins and raised at an $11 billion valuation, per our guide’s own sourcing
Spellbook
AI contract review and drafting tool that works directly inside Microsoft Word.
- Named for contract review in Microsoft Word in our guide’s own comparison table
📚 Legal AI guides
Best AI Tools for Lawyers (2026): Research, Contracts & Case Mgmt
How much time does AI really save lawyers?The two layers of legal AIBest AI tools for legal research and draftingBest AI tools for contract…
Tools mentioned in our guides
🔍 Legal research & drafting
📄 Contract review & drafting
⚖️ Litigation & e-discovery
FAQ
Will AI replace lawyers?
No. AI automates parts of the work, especially research, review and admin, but it cannot take responsibility for advice, exercise judgment or stand up in court. AI now handles more of the routine work, but it augments lawyers rather than replacing them: in 2025 testing, AI matched but did not clearly beat experienced lawyers, and every output still needs a human to check it.
What is the best AI tool for a small law firm?
For most solos and small firms, start with Clio for practice management and billing, add Smith.ai or LawDroid for client intake, and use Smokeball or Laurel to capture billable time. Add a research tool like CoCounsel or Paxton only when your caseload justifies it.
Are AI legal research tools accurate?
They are far better than general chatbots because they cite primary law, but they are not perfect. Independent 2025 testing put the leading tools around 80 percent accuracy, ahead of a lawyer baseline near 70 percent, but with a sharp drop on complex multi-jurisdictional questions. Always verify every citation against the source before you rely on it.
What is the difference between ChatGPT and legal-specific AI?
General assistants like ChatGPT are cheap and useful for low-stakes drafting, but they do not run on a verified law database and can invent cases. Legal-specific tools like CoCounsel Legal and Lexis+ with Protégé are built on primary law and return checkable citations, which is what you need for anything that reaches a client or a court.
How do I keep client data confidential when using AI?
Use tools with encryption, clear data-handling terms and compliance certifications, and confirm your inputs will not be used to train public models. Purpose-built legal platforms increasingly offer enterprise controls, including customer-held encryption keys. Avoid pasting privileged material into consumer chatbots.