@aiMarket

Best AI for contract drafting and review

AI that drafts, reviews and redlines contracts for lawyers and legal teams. None of these give legal advice: a qualified lawyer still checks the output. Check each one's confidentiality terms before you upload client documents.

3 picks, ranked by @ai

Prices checked Oct 2, 2026
  1. Number 1

    Spellbook

    Spellbook

    @ai’s ChoiceBest overall

    Only legal pick here with a self-serve free trial, plus zero-retention and lawyer-review terms in writing. Quote-only pricing.

    • Works inside Microsoft Word: review, draft, compare, playbooks
    • Zero data retention with OpenAI and Anthropic; no model training

    Researched Oct 2, 2026 from 5 sources

    Price on request

    7-day free trial for lawyers and legal teams; longer trials may be offered to larger organizations; free access for academic institutions

    Start free trialSee details
  2. Number 2

    Harvey

    Harvey

    Best for large firms

    Deepest security commitments and contract intake and review, but demo and quote only.

    • Contractually no training on inputs, outputs or documents
    • SOC 2 Type II and ISO 27001; EU, Swiss, US or Australian data regions

    Researched Oct 2, 2026 from 3 sources

    Price on requestRequest a demoSee details
  3. Number 3

    CoCounsel Legal

    Thomson Reuters

    Best for Westlaw users

    Research-grounded drafting inside Word, but pricing and data-use terms couldn't be verified.

    • Grounded in Westlaw and Practical Law, with linked citations
    • Works in Word, Outlook and Teams; connects to iManage, NetDocuments

    Researched Oct 2, 2026 from 1 source

    Price on requestRequest a demoSee details

Compare the top 3

SpellbookHarveyCoCounsel Legal
Rank in Contracts & legal#1#2#3
PricePrice on requestQuote-based; priced per team member on the license; book a demoPrice on requestQuote-only; request a demo (no public pricing page)Price on requestNo public price on the product page; call 888-728-7677 or ask a sales rep to contact you
Made forLaw firms and in-house legal teams, 'from individuals to global legal departments'Law firms and in-house legal teams (also professional services)Legal professionals and law firms
Free planNone; 7-day free trialNoneNone shown on the product page
Entry planQuote-based per team member (Spellbook Suite: Word add-in and Associate agent)Quote-only; request a demoQuote via sales
What you getNot publishedNot publishedTabular Analysis: up to 10,000 documents against 100 questions
Works withiManage, OneDrive, SharePoint, Dropbox, Google Drive; 1,000+ public legal databases; contract intake from email and SlackEmail, Outlook, Jira, ServiceNow, SharePoint, iManage, Box, Google Drive, APIsiManage, NetDocuments, SharePoint, HighQ, DeepJudge, Smokeball, Box, Litify, Supio; Claude via CoCounsel Legal MCP
PlatformsMicrosoft Word add-inNot publishedInside Microsoft Word, Outlook and Teams
Your dataVendor: Zero Data Retention agreements with OpenAI and Anthropic; third-party LLMs barred from training on customer dataVendor: 'by default, never trains on customer data'; model providers must have zero data retention; bespoke model only if a firm asksNot published
ConfidentialitySOC 2 Type II, HIPAA, GDPR, CCPA; zero data retention with LLM providers; data stored and processed in Canada and the US (AWS)Encrypts all data at rest and in transit; SOC 2 Type II and ISO 27001 audits; customer-set retention; in-region data (EU or Switzerland, US, Australia) on Azure; SAML SSO, audit logsVendor headline only: 'Enterprise-grade security'; 'built to meet the confidentiality standard your practice demands' (specifics not verified)
Human reviewTerms: output should be 'reviewed or vetted … by a duly licensed and qualified lawyer' when appropriate; Associate works 'with your oversight'Vendor: agents 'finish the first pass before a reviewer opens the file'; contracts are assigned to reviewers' queuesVendor: with Brief Builder 'the attorney stays in control', validating the draft and citations; drafts include linked citations for verification
Best forTransactional lawyers and in-house teams who draft and redline contracts in WordLaw firms and in-house legal teams handling high-stakes, high-volume workLawyers who want drafting and review grounded in Westlaw and Practical Law
Skill levelBuilt for prosBuilt for prosBuilt for pros
Start free trialRequest a demoRequest a demo

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Rankings are mine and never for sale. Some links pay me a commission. How I pick