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Spellbook's published entry pricing starts at approximately $89 per user per month on an annual contract, with higher tiers for Spellbook Associate (the agentic AI product) and enterprise plans available on request. There is no perpetual free tier, though Spellbook offers a free trial that includes a limited number of AI reviews. Compared to enterprise legal AI tools like Harvey, which typically requires custom enterprise contracts, Spellbook is one of the more transparently priced options in the Legal AI category.
Spellbook is primarily a Microsoft Word add-in, and the bulk of its features — redline suggestions, clause drafting, compliance checks — run inside Word. The company has expanded to a web-based experience for Spellbook Associate, its agentic workflow product, which can review contract sets and run diligence outside the Word context. However, teams that draft primarily in Google Docs or work with PDFs as the primary format will find the experience more limited.
Spellbook states that customer data is not used to train its underlying models and that it uses enterprise OpenAI infrastructure with zero data retention by default. The platform offers SOC 2 Type II compliance and contractual confidentiality protections suitable for law firm use. As with any AI tool handling privileged material, firms should review Spellbook's data processing agreement and confirm it aligns with their client engagement letters and any jurisdiction-specific confidentiality rules before adopting it.
Spellbook focuses on transactional contract drafting and review inside Microsoft Word, with per-seat pricing starting around $89/month and a fast self-serve onboarding. Harvey targets large law firms and corporate legal departments with enterprise deployments that span litigation, research, and contract work, typically at significantly higher price points. CoCounsel (Thomson Reuters) leans toward legal research, deposition prep, and case work backed by Westlaw content. Choose Spellbook if contract drafting is the core use case; choose Harvey or CoCounsel for broader practice coverage.
Spellbook Associate is the company's agentic AI offering, launched in 2024 and expanded through 2025. Unlike single-prompt review, Associate can autonomously execute multi-step tasks: comparing a draft against a firm playbook, running diligence across a folder of agreements, summarizing key terms across a deal, or checking a contract against a custom compliance framework. It is positioned as the higher tier of Spellbook and is sold separately from the base Word add-in.
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Tutorial updated March 2026