Spellbook runs 530,000 contract reviews a month with Claude
SpellbookClaude Platform · Claude CodeSpellbook, a contract drafting and review platform serving 5,000 customers across 80 countries including in-house legal teams at companies like LG, Dropbox and eBay, built Claude-powered agents that review and redline contracts inside Microsoft Word, apply each legal team's own review standards automatically, and orchestrate about 15 different Claude agent configurations matched to task complexity. Spellbook's agents now run about 530,000 contract reviews a month and field more than 700,000 lawyer chat messages a month, cutting the time to complete an agreement roughly 10x, from about 10 hours of lawyer work to about one hour.
Overview
Spellbook, a contract drafting and review platform serving 5,000 customers across 80 countries including in-house legal teams at companies like LG, Dropbox and eBay, built Claude-powered agents that review and redline contracts inside Microsoft Word, apply each legal team's own review standards automatically, and orchestrate about 15 different Claude agent configurations matched to task complexity. Spellbook's agents now run about 530,000 contract reviews a month and field more than 700,000 lawyer chat messages a month, cutting the time to complete an agreement roughly 10x, from about 10 hours of lawyer work to about one hour.
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Inspect the highlighted sourceThe challenge
Contract review meant lawyers reading 50-page contracts line by line in Microsoft Word to find issues, then manually editing and copying between agreements. A single agreement could absorb 10 hours of a lawyer's time, making it a $10,000 document at a top firm's billing rate, and in-house legal teams see thousands of contracts flow through every year.
The solution
Spellbook built Claude-powered agents that draft and review contracts inside Microsoft Word, comparing terms against the market and applying each legal team's own codified review standards (playbooks) automatically. About 15 Claude agent configurations are orchestrated on the review surface alone, matched to subtask complexity, with Fable 5 used as an oracle model to generate evaluation criteria and grade production models. The product keeps edits confined to specified paragraphs with zero data retention, and Spellbook recently launched autonomous contract management that moves agreements through triage, review, negotiation, storage and monitoring without a human opening them first.
Reported business value
Spellbook's Claude-powered review agents now run about 530,000 contract reviews a month and field more than 700,000 lawyer chat messages a month. Agreement turnaround time is cut 10x, from about 10 hours of lawyer work to about one hour. Spellbook has grown to 5,000 customers across 80 countries and 250 employees, with growth accelerating after the Claude-powered features launched.
Sources
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