TL;DR: Spellbook is an AI-powered contract drafting assistant that works directly inside Microsoft Word. Trained on billions of lines of legal text, Spellbook can suggest new clauses, flag unusual language, identify missing provisions, and draft entire contract sections — all without leaving your document. View Spellbook tool page
What Is Spellbook?
Spellbook is an AI contract drafting tool developed by Rally Legal. What makes Spellbook distinctive is its deep integration with Microsoft Word — the tool lawyers already use every day. Rather than requiring attorneys to switch to a new platform, Spellbook adds an AI sidebar to Word that understands the contract you are editing and provides contextual suggestions.
The system was trained on billions of lines of legal agreements, enabling it to understand standard contract structures, common clause variations, and industry-specific language. When you are drafting a contract in Word, Spellbook can suggest the next clause, flag unusual or aggressive terms, identify provisions that may be missing, and even draft entire sections based on your instructions.
In 2026, Spellbook has become one of the most adopted legal AI tools for mid-market law firms and in-house legal teams. Its Word-native approach eliminates the friction of adopting new software — a critical factor in the traditionally conservative legal industry.
Key Features
| Feature | Description |
|---|---|
| Microsoft Word Integration | Works as a sidebar within Word — no separate application needed |
| Clause Suggestion | AI suggests relevant clauses based on the contract type and context |
| Unusual Language Detection | Flags terms that deviate from market standards |
| Missing Provision Alerts | Identifies standard clauses that may be absent from the contract |
| Contract Drafting | Generates entire sections from natural language instructions |
| Redlining Assistance | Suggests negotiation positions and alternative language |
| Knowledge Base | Trained on billions of lines of legal agreements |
Spellbook Pricing in 2026
| Plan | Price | Includes |
|---|---|---|
| Starter | $99/user/month | Core drafting features, clause suggestions, Word integration |
| Professional | $199/user/month | Everything in Starter + unusual language detection, missing provisions |
| Enterprise | Custom pricing | Full platform + custom playbooks, team analytics, priority support |
How to Use Spellbook
- Sign up: Request access at Spellbook's website
- Install the Word add-in: Download and install the Spellbook add-in for Microsoft Word
- Open a contract: Open any contract document in Word — Spellbook activates automatically
- Get suggestions: Click on the Spellbook sidebar to see AI-generated clause suggestions and analysis
- Draft with AI: Type a natural language instruction and Spellbook drafts the clause for you
- Review flags: Check Spellbook's alerts for unusual language or missing provisions
- Always review: Human attorney review remains essential for all AI-generated content
Pros and Cons
| Pros | Cons |
|---|---|
| Lives in Microsoft Word — zero workflow disruption | Requires Microsoft Word (no Google Docs support) |
| Trained specifically on legal agreements | $99+/user/month pricing can add up for large teams |
| Excellent clause suggestion accuracy | Limited to contract work — not for litigation or research |
| Missing provision detection catches oversights | Suggestions may need significant customization for niche industries |
Spellbook Alternatives
| Tool | Best For | Key Difference |
|---|---|---|
| Harvey AI | Full legal AI platform | Broader capabilities beyond contracts — research, litigation, regulatory |
| Ironclad | Contract lifecycle management | Full CLM platform with workflows, approvals, and repository |
| Luminance | Document review | Specializes in high-volume review rather than drafting |
Try Spellbook
Ready to draft contracts faster? Visit Spellbook to request access, or check out our Spellbook tool page for more details and comparisons.
Frequently Asked Questions
Is Spellbook free?
No. Spellbook starts at $99/user/month for the Starter plan. There is no free tier, but the company offers demos and trial periods for evaluation.
Does Spellbook work with Google Docs?
Currently, Spellbook only works with Microsoft Word. Google Docs support has been requested by users but is not yet available as of 2026.
Can Spellbook replace a contract attorney?
No. Spellbook is an assistant that drafts faster and catches issues, but all output must be reviewed by a qualified attorney. It accelerates the drafting process rather than replacing legal expertise.
