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Harvey vs Spellbook
A plain-English comparison to help you choose between them.
The real difference here is whether you can buy it this week. Pick Spellbook when the bottleneck is contracts and you want to start now: it works inside Microsoft Word with risk flagging, one-click redlines and drafting, on a paid plan you sign up for after a short trial. Choose Harvey when the job is a firm-wide deployment at document scale, where Vault queries across large matter sets. Harvey publishes no price and offers no self-serve signup; it arrives through procurement.
Side by side
- Summary
Harvey is an enterprise generative-AI platform for legal and professional-services work.
- Best for
- Enterprise legal research, drafting, summarisation and document review
- Vault: bulk-analysing up to 100,000 documents per set
- Firm-wide deployments bought through an enterprise agreement
- A suite spanning Assistant, Vault, Knowledge, Agents and Contract Intelligence
- Querying across large legal document sets in one place
- Less suited to
Harvey is not for the solo practitioner or small firm that wants to buy and use legal AI the same day: that reader is better served by a self-serve tool such as Spellbook. Nor is it general enterprise search across every connected system, where Glean goes wider, since Harvey's retrieval is scoped to the legal document sets and matter files it holds.
Where it does fit, treat rollout as a data-confidentiality and access-control decision. Harvey ingests confidential matter material at scale, so who may open which vault, what leaves the firm and how access is governed weigh as heavily as the platform choice itself; settle those with your risk and compliance owners before it becomes load-bearing.
- Cost
- Enterprise
- Ease
- Intermediate
- Openness
- Hosted service
- Data
- Harvey holds confidential matter material at scale, so the data questions belong inside procurement rather than after it: agree vault access, retention and what may leave the firm with your risk and compliance owners as part of the agreement, and treat rollout as an access-control decision as much as a purchase.
- Summary
Spellbook is an AI legal assistant that works inside Microsoft Word, where contracts actually get drafted and negotiated.
- Best for
- Contract review with risk flags and one-click redlines inside Word
- Drafting agreements from firm templates or from scratch
- Encoding negotiation standards as playbooks for consistent review
- Multi-document transactional work through Spellbook Associate
- Legal teams and founders who negotiate contracts weekly
- Less suited to
Spellbook is not a lawyer and its output is not legal advice: a qualified lawyer owns every contract before signature, and AI-suggested redlines and benchmarks are starting points, not decisions. Lawyers using it remain bound by their duties of competence and supervision, so Associate's multi-document output is treated like a junior associate's work product, always reviewed and never auto-sent.
It is also narrow by design. Litigation, regulatory analysis and legal work that never touches a Word document sit outside its shape, and there is no permanent free tier, so occasional contract questions are cheaper answered by a general assistant. Confirm the retention and training posture in writing before uploading privileged material.
- Cost
- Paid only
- Ease
- Beginner-friendly
- Openness
- Hosted service
- Data
- Spellbook's security posture is stated plainly. It is SOC 2 Type II certified and GDPR, CCPA and PIPEDA compliant, and Zero Data Retention agreements are available so customer contracts are not used for model training. Contracts are among the most sensitive documents a business holds, so confirm the retention and training posture in writing before uploading privileged or client material. And the boundary the tool cannot move stands: it is not a lawyer, its output is not legal advice, and a qualified lawyer owns every contract before signature.
By area
Where each one pulls ahead, area by area.
| Area | Pick Harvey when | Pick Spellbook when |
|---|---|---|
| Legal & compliance | Harvey is an enterprise platform bought through an agreement with minimum seat commitments, not a tool a smaller firm can sign up for and use the same day | you want self-serve legal AI a solo practitioner or small firm can actually buy without a sales process |
| Writing & research | Harvey approaches drafting and research as an enterprise platform across the full matter, sold through an agreement rather than a self-serve subscription | a smaller firm wants contract drafting and review it can buy and start using without an enterprise commitment |
Common questions
Can a small firm just sign up and start today?
With Spellbook, yes. It is a paid product with a short trial, aimed at legal teams, firms and founders with steady contract flow, and it runs inside Microsoft Word where those contracts are already drafted and negotiated. Harvey works differently: the public site offers only a demo request and a customer login, pricing is unpublished, and there are minimum seat commitments from the start. A solo or small firm that wants legal AI this week buys Spellbook.
How much does Harvey cost?
There is no official figure to quote: Harvey does not publish pricing, and evaluation runs through an enterprise agreement rather than a signup page, with minimum seat commitments from the outset. Third-party accounts place annual contracts in the low-to-mid six figures, with Harvey confirming nothing publicly. That makes it a considered procurement, not a self-serve purchase. Spellbook, by contrast, is a paid product you can trial briefly and then buy directly. If a stated, self-serve price is what you need to move, that points you to Spellbook.
Which one suits reviewing very large sets of documents?
That is Harvey's Vault, its document engine, which stores, organises and bulk-analyses large sets and can query across up to 100,000 documents in a single vault, scoped to the matter files it holds. It suits discovery, due diligence and matters that turn on reading a great deal. Spellbook is contract-centric: it reviews agreements, drafts from templates or scratch, and answers questions over documents with citations, with Spellbook Associate extending into agentic multi-document work. Remember a qualified lawyer owns every contract before signature.
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Tool facts last checked July 2026