# How Spellbook uses Claude

**10x**: “Cuts the time to complete an agreement 10x, from roughly 10 hours of lawyer work to about one”

As published on [claude.com](https://claude.com/customers/spellbook). Captured by usedby on 2026-10-30.

- Company: [Spellbook](https://www.usedby.ai/companies/spellbook.md)
- Tool: [Claude](https://www.usedby.ai/tools/claude.md)
- Industry: [Legal & Compliance](https://www.usedby.ai/companies/industry/legal-compliance-legaltech.md)
- Teams: Legal, Engineering, Partnerships

## The use case: how Spellbook deploys Claude

Spellbook builds contract drafting, review, and management software for legal teams, using Claude-powered agents inside Microsoft Word to flag risks, negotiate terms, and draft redlines. It also uses Claude Code for its own engineering work.

Summary written by usedby from the source page, in English. The figures are those of Claude and Spellbook, not ours.

> Behind the volume, an agreement that took 10 hours of work now takes about one, what Stevenson calls “a true 10x efficiency improvement.”

- **530,000**: “Runs its Claude-powered review agents across about 530,000 contracts every month”
- **700,000**: “Handles more than 700,000 chat messages from practicing lawyers each month”
- **5,000**: “Spellbook has grown to 5,000 customers and 250 employees, with growth accelerating after the Claude-powered features launched.”

> Fable calls out more important issues, and for the issues it calls out, it calls them out far more consistently than any of the other Opus models
>
> Jordan Weir, Senior Engineer

Source: [claude.com](https://claude.com/customers/spellbook), captured 2026-10-30.

## Other AI tools used by Spellbook

- [Replit](https://www.usedby.ai/tools/replit.md) — Confirmed
- [GetCrux](https://www.usedby.ai/tools/getcrux.md) — Observed

## Claude users in Legal & Compliance

- [Harvey](https://www.usedby.ai/companies/harvey.md) — Confirmed
- [Steno](https://www.usedby.ai/companies/steno.md) — Confirmed
- [EvenUp](https://www.usedby.ai/companies/evenup.md) — Observed
- [Legora](https://www.usedby.ai/companies/legora.md) — Observed
- [Thomson Reuters](https://www.usedby.ai/companies/thomson-reuters.md) — Observed

## What usedby checked

We compared the story with its live page on 2026-10-30.

- Checked: the figure 10x is printed word for word on the page, near the name of Spellbook.
- Checked: the passage quoted above is copied word for word from the page, near the name of Spellbook.
- Checked: Spellbook uses Claude. Confirmed line. Latest check across sources: 2026-10-30.
- Not checked: the result itself. We quote it; we did not measure it.

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Source: https://www.usedby.ai/case-studies/spellbook-claude · How we check: https://www.usedby.ai/methodology