Spellbook

Spellbook is an AI contract review and drafting tool that works inside Microsoft Word for transactional lawyers and in-house legal teams. Rather than asking lawyers to upload agreements to a separate web app, it sits in the Word sidebar and suggests tracked changes directly in the document. That focus on the drafting surface, plus playbooks that encode a team's negotiating positions, is what sets it apart from general legal chat tools.

What is Spellbook used for?

Spellbook is mostly used for the daily grind of commercial contracts: first-pass reviews, markups, and drafting from precedent. It reads the open document, understands which party you represent, and proposes changes you can accept or reject like any other redline.

• Reviewing an incoming MSA, NDA or supplier agreement and flagging missing or unusual terms
• Redlining a counterparty draft from your side, with every edit tracked in Word
• Drafting new clauses or full agreements from a prompt or from your saved library
• Comparing terms against market norms to see whether a position is standard
• Asking quick questions about a contract, such as what the termination rights are
• Running Associate, the multi-document agent, across a set of related agreements

Who Spellbook is best for

Spellbook fits corporate and commercial lawyers at small and mid-size firms, solo transactional practitioners, and in-house counsel who review vendor and customer paper every week. Its pricing page also lists industry solutions for energy, healthcare, financial services, technology, manufacturing and retail. Litigators who mainly need case law research, or teams that want a full contract repository first, should look at tools built around those jobs.

Spellbook pricing

As of October 2026, Spellbook does not publish prices. Its pricing page says plans are custom and based on the number of team members on the license. Both the law firm and in-house packages include the Word add-in (Review, Draft, Ask, Benchmarks and Playbooks) and the Associate agent, with training sessions and dedicated support for teams over 10. In-house plans add a playbook build service. A 7-day free trial is available, and larger organizations can ask about extended trials when they book a demo.

Limitations to keep in mind

• You need to talk to sales for a price, which makes quick budgeting harder for solo lawyers
• It is built for contracts, so litigation research and court filings are outside its core job
• Suggested redlines still need a lawyer's review, especially on unusual or high-value deals
• The best results depend on investing time in playbooks and a clean precedent library

Spellbook vs alternatives

Harvey is the better fit for large firms that want one AI platform spanning research, litigation and transactional work, and that can absorb an enterprise rollout. Legora suits teams that want collaborative review grids across many documents and a broader legal workspace. AI Lawyer is aimed more at individuals and small practices that want inexpensive legal drafting help rather than firm-grade playbooks. Claude can review a contract you paste in, but it does not produce tracked changes inside Word or enforce firm positions. Spellbook wins when the job is negotiating commercial agreements quickly and consistently in Word.

Tips for getting started with Spellbook

Use the trial on real agreements you negotiate often, such as your standard NDA and MSA, so you can judge redline quality against your own markups. Write one playbook for your most common contract type before rolling it out, since that is where consistency gains show up first. Tell Spellbook clearly which party you represent at the start of each review, because the suggestions change with your side of the deal.

Spellbook FAQ

Is Spellbook free?

No, Spellbook is a paid product, but it offers a 7-day free trial. Pricing is custom and based on the number of team members on your license.

Does Spellbook work in Microsoft Word?

Yes. Spellbook's core product is a Microsoft Word add-in that reviews, drafts and redlines contracts with tracked changes inside the document you already have open.

Is Spellbook safe to use with client data?

Spellbook says it holds SOC 2 Type II certification and has zero data retention agreements with its AI model providers, so client documents are not used for model training.

What is the best alternative to Spellbook?

Harvey is the main alternative for large firms wanting a full legal AI platform, while Legora suits teams that review many documents at once in a shared workspace.