Spellbook

Spellbook is a Microsoft Word add-in that uses leading LLMs (GPT-5, Claude, and others) to review contracts, redline against playbooks, draft from precedents, and answer contract questions with citations. The Spellbook Suite combines the Word Add-In (Review, Draft, Ask, Benchmarks, Playbooks) with Associate, a multi-document agent that works through complex matters with attorney oversight. Used by 4,400+ in-house legal teams and law firms worldwide. Operates as agent-augmented rather than fully autonomous: every redline and draft requires lawyer review before client delivery, which is the appropriate posture for legal work where downstream liability is unforgiving. Pricing is demo-gated for in-house teams; law firms can start with a free trial. No published per-seat rate, but typical legal AI tooling in this category runs $100-$300 per user per month based on third-party comparisons. Setup involves installing the Word add-in, configuring playbooks (Spellbook offers a build service for teams over 10), and training on firm precedents -- most firms are operational within 1-2 weeks. Best fit for transactional lawyers who already work in Word and want AI assistance inside their existing drafting environment rather than a separate research portal.