Clearbrief review

Clearbrief is the verification layer on this list. It runs in Microsoft Word and checks a brief's facts and citations, displaying the cited law next to your writing through LexisNexis for Lexis subscribers or Fastcase vLex for everyone else. Clearbrief says its cite-checking uses deterministic machine learning rather than generative AI, so the checks themselves cannot hallucinate, and it handles exhibits, hyperlinking and Tables of Authorities as part of the filing workflow. Teams that research in Westlaw can upload cases so they show at the exact pincite. It also checks work drafted in Harvey, Legora, Westlaw or LexisNexis tools, which makes it a useful second step after any drafting assistant. Clearbrief states a majority of the AmLaw 20 use it and that it is the official cite-checking tool of the American Arbitration Association. The Solo plan costs $300 per user per month on an annual subscription, with lower multi-year pricing; Enterprise Unlimited is quoted and includes 1:1 training.

Who it is for

Litigation and appellate teams that need verified citations before filing

Price

Solo $300 per user per month on an annual subscription; Enterprise Unlimited by quote.

Solo plans are $300 per user per month, with lower pricing for multi-year agreements.
Quoted from the vendor pricing page on November 12, 2026.

Key features

• Cite-checking built on deterministic machine learning rather than generative AI
• Shows cited law side by side in Word via LexisNexis or Fastcase vLex
• Creates exhibits, hyperlinks and Tables of Authorities
• Checks facts and law in drafts written with other AI tools
• Upload of Westlaw cases so they display at the exact pincite

Strengths and weaknesses

• Strength: Cite-checks are deterministic, so they cannot hallucinate
• Strength: Official cite-checking tool of the American Arbitration Association
• Strength: SOC 2 Type II and does not train on your data
• Weakness: Solo plan costs $300 per user per month on an annual subscription
• Weakness: Checks and formats work rather than doing research from scratch
• Weakness: Westlaw users need to upload cases for exact pincite display

Key facts

• Solo plan: $300 per user per month, annual license
• Works in: Microsoft Word
• Users: A majority of the AmLaw 20
• Security: SOC 2 Type II

Where it ranks

Clearbrief is No. 9 in our Best AI Legal Tools verdict.