Overview
Spellbook is an AI contract drafting and review tool that integrates directly into Microsoft Word, enabling attorneys to draft, analyze, and redline contracts without switching applications. Powered by GPT-4 and trained on an extensive corpus of legal text, Spellbook understands contract language at a nuanced level that general-purpose AI tools cannot match. The workflow is simple: open any contract in Word, activate the Spellbook panel, and ask it to review a specific clause, suggest aggressive or defensive redlines, draft missing provisions, or identify standard market terms. Spellbook can generate full contract sections from a description of what each party needs. Spellbook's redlining capabilities are particularly strong for transactional attorneys. It understands the difference between buyer-favorable and seller-favorable terms, can apply playbook rules to flag non-standard language, and suggests negotiating alternatives grounded in market practice. The tool also identifies what provisions are missing relative to standard transaction documents. Because Spellbook runs inside Word, it fits naturally into existing workflows without requiring attorneys to learn a new platform. It integrates with Microsoft 365 and operates via a sidebar panel. Pricing starts at approximately $149/month per user. Best suited for corporate transactional attorneys, M&A teams, and in-house counsel who live in Word for contract work.
Key features
Word Add-In Interface
Spellbook runs as a sidebar in Microsoft Word. Attorneys highlight text or position their cursor and invoke AI suggestions without leaving the document — zero context switching.
Section Drafting
Describe a contract provision in natural language and Spellbook drafts it. Useful for generating first-draft language on standard clauses (limitation of liability, indemnification, IP assignment) that attorneys then edit.
Language Alternatives
Highlight any clause and ask for more favorable, more balanced, or more aggressive alternatives. Speeds up negotiation prep and redline drafting.
Clause Explanation
Highlight a complex or unusual provision and get a plain-English explanation. Useful for helping clients or business stakeholders understand what they are agreeing to.
Risk Flagging
Automatic identification of potentially risky provisions: one-sided indemnification, auto-renewal traps, broad IP assignments, and unusual payment terms.
Legal Database Training
Trained on a large corpus of commercial contracts. More accurate on standard commercial agreement language than general-purpose AI tools.
Pros and cons
Pros
- Works inside Microsoft Word — no context switching to a separate AI platform during drafting
- Drafts entire contract sections from a prompt — reduces first-draft time on standard provisions
- Plain-English explanations of clauses help non-attorney business stakeholders understand what they're signing
- Risk flagging identifies potentially unfavorable provisions for review
- Lower cost than Harvey or CoCounsel for attorneys primarily doing contract drafting
Cons
- Pricing is not publicly disclosed — requires a sales conversation
- AI outputs require mandatory attorney review — clause drafts are starting points, not final language
- Microsoft Word-only — no equivalent Google Docs support
- Less capable than Harvey for multi-document due diligence and broader legal AI tasks
- No legal research database integration — not grounded in case law the way CoCounsel is in Westlaw
Pricing
Pricing current as of May 2026; verify with vendor before purchasing.
Who it's best for
Best fit for
- Transactional attorneys doing high-volume commercial contract drafting who work in Microsoft Word
- In-house counsel reviewing and negotiating standard agreements (NDAs, MSAs, employment agreements)
- Small firm attorneys who want AI drafting assistance without the cost of Harvey or CoCounsel
- Business lawyers who want to explain contract provisions to non-attorney clients quickly
Not a fit for
- Litigators who need AI legal research rather than contract drafting assistance
- Attorneys using Google Docs as their primary drafting environment
- Firms needing full CLM workflow, repository, and approval routing (use Ironclad or Concord)
- Due diligence teams reviewing large document volumes (Harvey is better suited)
Frequently asked questions
Spellbook does not publish pricing. Contact their sales team for current pricing. The tool is positioned as more affordable than Harvey for attorneys primarily doing contract work.
No. Spellbook is a Microsoft Word add-in only. Google Docs users cannot access it.
Spellbook is narrowly focused on contract drafting within Microsoft Word. Harvey is a broader legal AI platform with research, due diligence, and drafting capabilities. Spellbook is typically cheaper; Harvey covers more ground.
Reasonably accurate for standard commercial contract language, but attorney review is required. Spellbook is a drafting accelerator, not a replacement for attorney judgment on legal language.
No. Spellbook is trained on contract language, not legal research databases. For citation-verified research, use CoCounsel or Lexis+ AI.