Spellbook

Spellbook is an AI contract tool for legal professionals that lives inside Microsoft Word. Rather than asking lawyers to paste contracts into a chatbot, it runs as a Word add-in: open a contract and Spellbook can review it, suggest redlines, draft new clauses or whole documents, answer questions about the text, and compare terms against market benchmarks — all without leaving the document.

The company says it's trusted by more than 5,000 legal teams worldwide, and positions itself against general-purpose AI with a simple argument: it's built specifically for contract work, combining what it describes as 12+ leading language models with contract-focused training and legal drafting context. Its newer "Associate" product is billed as an AI agent that can work through multi-document legal matters under your oversight.

Spellbook is unambiguously a tool for lawyers — its free trial is for "lawyers and legal teams", and the whole product assumes you can judge its suggestions. Pricing is custom per seat and not published, which tells you it's priced like professional legal software rather than a consumer app.

How Spellbook works

A typical review looks like this:

1. Install the Word add-in and open the contract in Microsoft Word.
2. Run Review — Spellbook suggests redlines and flags risks directly in the document.
3. Ask questions about the text, or have it draft missing clauses in the contract's own style.
4. Benchmark the terms against market standards, and apply your team's Playbooks so reviews follow your own rules.
5. For bigger matters, Associate can work across multiple related documents with your oversight.
6. You make the calls — Spellbook suggests; the lawyer decides.

Key capabilities

Review — AI redlining and risk flags on third-party paper, inside Word.

Draft — New clauses and full documents that match the contract's language and style.

Ask — Questions answered against the actual text in front of you.

Benchmarks — Compare terms against market standards to spot unusual positions.

Playbooks — Codify your team's review rules so AI applies your standards consistently.

Associate — A multi-document AI agent for larger matters, working under lawyer oversight.

Word-native — Everything happens in Microsoft Word, where contracts already live.

Spellbook plans and pricing explained

Spellbook does not publish prices. Its pricing page offers two tracks — Law Firms and In-House Teams — and says pricing "is structured around the number of team members on your license", with personalised quotes via a demo booking.

Law Firms — the Spellbook Suite (the Word add-in with Review, Draft, Ask, Benchmarks and Playbooks) plus the Associate multi-document agent, group training sessions, online support, and dedicated support for teams over ten.

In-House Teams — the same Suite and Associate, with team training and online support, a Playbook Build Service, and dedicated support for teams over ten.

For context, the company's own industry writing puts AI contract review software for individual and small teams at around $0–$6,000 a year as a category range — Spellbook gives no figure of its own, so treat any specific estimate you see elsewhere as unverified. Independent coverage notes that academic institutions can get free access. There is a 7-day free trial for lawyers and legal teams, and larger organisations can ask for extended trials.

The legal AI context

Contract AI is a crowded, fast-moving category and Spellbook's bet is distribution: lawyers already draft in Word, so it meets them there rather than asking them to adopt a new system. That contrasts with contract lifecycle platforms, which try to own the whole process from request to signature, and with broad legal AI assistants that cover research and memos as well as contracts. Spellbook deliberately stays narrow — drafting, reviewing and negotiating — and counts on playbooks and benchmarks to be the features a general chatbot can't replicate for a firm's own standards.

Who Spellbook is for

Transactional lawyers in Word all day — review and redline without switching tools.

Small and mid-size firms — professional contract AI without building your own playbook tooling.

In-house legal teams — faster review of incoming paper against your own precedents.

Legal teams standardising review — Playbooks encode how your firm wants contracts handled.

Who should look elsewhere

Non-lawyers — Spellbook assumes legal judgement; a general AI assistant plus a lawyer is a better fit for occasional contracts. Anyone needing published self-serve pricing won't get a number without a sales call. And teams whose contracts live outside Word (Google Docs shops, CLM-centric workflows) should check fit first.

Getting the most out of Spellbook

Use the 7-day trial on real matters — judge it on your own contracts, not a demo doc.

Build Playbooks early: the value compounds once the AI applies your standards rather than generic ones.

Treat Associate's multi-document work as a supervised assistant, not autopilot — the oversight step is the point.

Go into the pricing call with your seat count and a target number: nothing is published, so everything is negotiated.