Harvey vs Spellbook
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Harvey if you want ai platform for legal and professional services with supervised legal agents (Supervised agent, enterprise); choose Spellbook if you want ai contract drafting and review inside microsoft word for transactional lawyers (Copilot, contact).
| Harvey | Spellbook | |
|---|---|---|
| What it is | AI platform for legal and professional services with supervised legal agents | AI contract drafting and review inside Microsoft Word for transactional lawyers |
| Type | product-with-agents | product-with-agents |
| Autonomy | Supervised agent | Copilot |
| Pricing | enterprise | contact |
| Best for | enterprise, mid-market | smb, mid-market, enterprise |
| Deployment | saas, api | saas |
| Modalities | text, api | text |
| Models | model-agnostic, gpt, claude, gemini | model-agnostic, gpt, claude |
| Protocols | rest-api | none |
| Integrations | iManage, Microsoft Word, Microsoft Outlook, SharePoint, Box, LexisNexis | Microsoft Word, Slack, Salesforce, iManage |
| Capabilities | 4 documented | 4 documented |
Harvey
- +Deep, verifiable enterprise traction (use across a majority of the Am Law 100 and a PwC alliance)
- +Purpose-built legal workflows with LexisNexis primary law and tight Microsoft and iManage integration
- +Extremely well-capitalized, lowering vendor-survival risk
- -Hallucination risk is material in a high-stakes domain; even with low reported rates, customers stress validating every output
- -Expensive, opaque, quote-only pricing with seat minimums
Spellbook
- +Native inside Microsoft Word, where transactional lawyers already work, so there is low workflow friction
- +Multi-model (GPT plus Claude) with citation-linked answers and playbook-encoded standards
- +Spellbook Associate extends from single-document copilot to supervised multi-document agentic workflows
- -Output requires lawyer review; like all legal LLM tools it carries hallucination and wrong-citation risk
- -Pricing is opaque (demo-gated), with reported enterprise rates high and rising and seat minimums
Which should you choose?
Harvey is ai platform for legal and professional services with supervised legal agents, best for enterprise, mid-market. Spellbook is ai contract drafting and review inside microsoft word for transactional lawyers, best for smb, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.