Spellbook
LegalSpellbook
Spellbook is an AI assistant for contract work that runs inside Microsoft Word. It drafts clauses, reviews contracts and compares terms to market norms.
- Contract drafting and review
- Works inside Word
- Nearly 4,000 customers
At a glance
Nearly 4,000 firms and legal teamsVerifiedAs of Mar 4, 2026RBCx press release
$350M valuationReported As of Oct 9, 2025
Evidence notes
- Evidence level: Verified, secondary.
- Added for contract work. It has 2026 customer figures and a reported valuation.
- Spellbook’s own customer count, quoted in a bank’s release. Customers include Nestlé, eBay and Kennedys.
- $350 million valuation. A $50 million Series B led by Khosla Ventures.
Key facts
As of Nov 11, 2026
- Who it's for
- Transactional lawyers and in-house teams that draft and negotiate contracts in Word.
- What does it do?
- An AI copilot for contracts that works in Microsoft Word: drafting, review and a Compare to Market feature that checks terms against data from hundreds of thousands of contracts.
- Which models does it use?
- Powered by large language models such as OpenAI's GPT-5, with legal-specific methods on top.
- What does it connect to?
- Microsoft Word.
- Who uses it?
- Nearly 4,000 law firms and in-house legal teams in 80 countries, including Nestlé, eBay and Kennedys (Mar 2026).
- How big is the company?
- $50M Series B at a $350M post-money valuation (Bloomberg, Oct 2025), plus $40M of debt from RBCx on Mar 4, 2026 to fund acquisitions. Spellbook says its revenue tripled in 2025.
Recently
Common questions
What is Spellbook?
Spellbook is an AI assistant for contract work that runs inside Microsoft Word. It drafts clauses, reviews contracts and compares terms to market norms.
Who is Spellbook for?
Transactional lawyers and in-house teams that draft and negotiate contracts in Word.
How much does Spellbook cost?
We have no price on record for Spellbook. Check Spellbook's site.
Does Spellbook run locally or in the cloud?
Spellbook runs in the vendor's cloud. You use it through chat apps and an API.
What are alternatives to Spellbook?
Others on the Legal shortlist: Harvey.