Spellbook
AI contract drafting and review inside Microsoft Word
An AI add-in for Microsoft Word that drafts and reviews contracts against a firm's own clause library and playbooks, built for transactional lawyers and in-house counsel who negotiate contracts often.
Picked for AI Tools for Regulated Industries.
Spellbook is an AI add-in for Microsoft Word that drafts and redlines contracts against a firm’s own playbook — its stored negotiation positions and clause preferences — rather than generating generic legal boilerplate. It stays inside the document you’re already working in, which is a deliberate difference from browser-based legal AI tools that ask a lawyer to copy contract text out of Word to get an answer.
It’s aimed at transactional lawyers: small to mid-size firms handling commercial agreements, employment contracts, leases and vendor deals, plus in-house counsel who negotiate the same handful of contract types repeatedly and benefit from having the company’s standard positions encoded once and reused. Firms doing twenty or more contracts a month across a few recurring types get the most out of the playbook and clause library; occasional, one-off drafting won’t see the same payback.
The tradeoffs are narrower scope and pricing opacity. Because it’s Word-only, any team drafting primarily in Google Docs or a document management system’s native editor gets nothing from it. And Spellbook doesn’t publish pricing — third-party estimates for its tiers vary substantially, which means getting an actual quote is a necessary step before comparing it against other legal AI tools on cost.
Features
Playbook-driven redlining
Reviews a contract against a firm's or company's own negotiation positions, flagging clauses that fall outside pre-approved terms.
Clause library
Draws on a searchable library of clauses and past agreements to draft new provisions in a consistent, firm-specific style.
In-Word workflow
Runs entirely as a Word add-in, so drafting and review happen inside the document instead of a separate browser tab.
Benchmarking against market terms
Shows where a counterparty's clause sits against what is common for that agreement type, which is the context a first-year lawyer lacks.
Deviation flags
Marks the terms that fall outside the firm's own accepted positions, so review starts at the exceptions rather than at page one.
Contract summaries
A plain-language brief of obligations, dates and risks, which is what most people wanted before agreeing to read the contract.
Use cases
- Reviewing and redlining vendor or customer contracts against standard positions
- Drafting first-pass clauses for common commercial agreement types
- Giving in-house counsel a consistent negotiation position across many contracts
- Getting a plain-language summary of an inbound contract before reviewing it
- Flagging where a counterparty's terms sit outside market norms
- Letting a small legal team handle contract volume that would otherwise need outside counsel
Compare Spellbook head to head
One side-by-side comparison, on pricing, platforms and where each one wins.
