Microsoft's AI assistant embedded across Windows, Office, Edge, and Microsoft 365 business apps.
AI / LLM comparison
Microsoft Copilot vs Spellbook
Pricing, pros, cons, and ideal use cases — side by side.
SpellbookEnterprise
AI contract review and drafting that lives inside Microsoft Word, where lawyers already work.
At a glance
| Microsoft Copilot | Spellbook | |
|---|---|---|
| Pricing | PaidCopilot Pro $20/user/month. Microsoft 365 Copilot $30/user/month (requires M365 license). | EnterpriseNot published — 7-day free trial, then per-seat pricing quoted after a demo. Ask about Playbook setup, which is where the value concentrates. |
| Category | AI / LLM | AI / LLM |
| Ideal for | Any SMB on Microsoft 365Professional ServicesFinancial ServicesAccountants | Small and mid-size law firms doing transactional workLean in-house legal teamsCorporate counsel handling high contract volumeFirms standardizing on drafting playbooks |
Pros & cons
Microsoft Copilot
Pros
- Deep Microsoft 365 integration
- Excellent in Excel and Outlook
- Teams meeting summaries
- Enterprise-grade security
Cons
- Requires Microsoft 365 license
- Limited outside Microsoft ecosystem
- Output quality varies by app
Spellbook
Pros
- Works inside Microsoft Word — near-zero workflow change
- Playbooks encode your standards so redlines stay consistent
- Compare benchmarks a deal against market comparables
- Cited answers rather than unsourced summaries
- Free trial available without a sales call
Cons
- No public pricing
- Transactional focus — weak fit for litigation practices
- Playbook quality determines output quality; setup is real work
- Not a legal research platform
Which should you choose?
Microsoft Copilot is the lighter-weight option (Paid), while Spellbook sits higher on the pricing ladder (Enterprise). Microsoft Copilot is built around any smb on microsoft 365; Spellbook leans more toward small and mid-size law firms doing transactional work. Shortlist the one whose strengths line up with your biggest constraint.
Still deciding between Microsoft Copilot and Spellbook?
Get one AI workflow a week showing AI / LLM in a real stack — what they cost, and where each one breaks.