Spellbook vs. Gavel Exec (2026): Which AI Contract Review Tool Is Right for You?

Spellbook and Gavel Exec are both AI contract review and drafting software with native Word add-ins. Spellbook costs ~$350/mo with a 6-month commitment and requires a sales call before you can try it. Gavel Exec is $160/mo with no commitment and instant trial access.

By Danae Martin · Updated: May 19, 2026

Spellbook and Gavel Exec are two AI contract tools that come up often in the same conversation. Both work inside Microsoft Word. Both use AI to flag risk, suggest redlines, and review against a custom playbook, but they’re built around different assumptions about what legal teams need most. These differences show up clearly in price, commitment, platform access, and depth. This comparison covers where each tool is stronger and how their pricing and access models differ.

Spellbook

Spellbook is an AI contract review and drafting tool that runs inside Microsoft Word. It includes Compare to Market, which benchmarks contract terms against market data, plus AI clause generation and the Associate multi-document agent. Law firms and in-house legal teams use it for both contract review and drafting work.

Gavel Exec

Gavel Exec is an AI contract review, redlining, and drafting tool for in-house legal teams and transactional law firms. It runs as a Microsoft Word add-in and as a full web application, with support for batch analysis across multiple contracts and multi-document comparison. Playbooks can be AI-generated, built from your existing uploaded files, or you can use built-in playbooks created by practicing deal lawyers. Playbooks are always lawyer-editable.

Key differences

Price: Spellbook is approximately $350/seat/mo, more than double the per-seat price of Gavel Exec (user-reported; Spellbook does not publish pricing publicly). Gavel Exec is $160/seat/mo or $1,740/year.
Commitment: Spellbook requires a 6-month commitment, roughly $2,100 upfront per seat, before you can start. Gavel Exec is month-to-month with no lock-in.
Trial access: Spellbook routes new users through a required discovery call before granting any trial access. Gavel Exec offers a free trial with 25 queries per user, no credit card and no sales call required.
Platform: Spellbook includes a Word add-in. Gavel Exec runs in Microsoft Word and as a full web application with batch analysis, multi-document comparison, and research tools on the web.
Playbooks: Spellbook offers playbooks with a Playbook Build Service for teams that want hands-on setup help. Gavel Exec playbooks can be generated with AI in minutes or built manually, and any lawyer can edit them without admin support.
Built by: Gavel Exec was founded by CEO and lawyer Dorna Moini (formerly Sidley Austin) and CTO Pierre Martin (ex-Microsoft, ex-Amazon), who writes about building legal-specific AI on his Substack.
Lawyerist ratings: Spellbook 4.1/5 · Gavel Exec 4.5/5

When evaluating the legal tech company Spellbook,

When evaluating Spellbook, the key factors to assess are pricing commitment, trial access requirements, and whether its Compare to Market benchmarking fits your workflow. Spellbook costs approximately $350/mo per user with a 6-month commitment required, totaling roughly $2,100 committed upfront per seat (user-reported; Spellbook does not publish pricing publicly), and trial access requires a discovery call before any access is granted. Spellbook runs inside Microsoft Word and online; core capabilities include AI drafting, clause generation, Compare to Market benchmarking against a database of recently negotiated agreements, and the Associate agent for multi-document workflows. Playbooks can be built manually or through a paid Playbook Build Service.

Gavel Exec was built by CEO Dorna Moini, a former Sidley Austin employment litigation associate, and CTO Pierre Martin, formerly of Microsoft Research and Amazon, who writes about legal-specific AI on his Substack. Available as both a Word add-in and full web application, Gavel Exec supports batch analysis across multiple contracts, multi-document comparison, and research tools on the web. Playbooks can be AI-generated from a contract type in minutes, built from uploaded files, or drawn from built-in defaults created by practicing deal lawyers; all are always lawyer-editable without admin involvement. Gavel Exec is $160/mo per user, more than 50% less than Spellbook's reported price, with no commitment and a free trial of 25 queries per user: no credit card, no sales call required.

When to choose Spellbook vs. Gavel Exec

When to choose Spellbook

You want a tool that covers AI drafting and contract review that has been around for a long time
You are willing to pay the premium for a dedicated onboarding service to help build your initial review playbooks
You regularly manage multi-document workflows like due diligence packages
You want Compare to Market benchmarking against a live database of recently negotiated agreements

When to choose Gavel Exec

You want the best-in-class AI contract review and drafting tool at a fair, predictable price; $160/mo per user with no long-term commitment
You want to start evaluating today without a sales call; get 25 free queries, no credit card required
You want the deepest contract review available: risk flagging, redlines, comments, AI playbook generation, legal-vetted built-in playbooks, citation sources, and summaries against your positions
You want AI-generated playbooks any lawyer on your team can build and update without involving legal ops or admin
You want review capabilities beyond Microsoft Word, including batch analysis across multiple contracts, multi-document comparison, and research tools on the web

Side-by-side comparison

Spellbook costs approximately $350/mo per user with a 6-month commitment (user-reported), which is roughly $2,100 committed upfront per seat, and requires a sales call before trial access. Gavel Exec costs $160/mo per user (or $1,740/year) with no long-term commitment and no sales call required to start. Both include Microsoft Word add-ins. Gavel Exec also offers a full web application with batch analysis, multi-document comparison, and the ability to start analysis before a document is open in Word.

Feature	Spellbook	Gavel Exec
Price	✗ $2,100 upfront per seat (6-month commitment)	✓ $160/seat/mo, no commitment
Commitment	✗ 6-month minimum	✓ Month-to-month
Free Trial	✗ Demo required to try the product	✓ 25 queries/user, no card required
AI Features	✓ Review, redline, draft	✓ Review, redline, draft, playbooks
Playbooks	✗ No AI playbook generator	✓ AI playbook generator
Word Integration	✓ Native add-in	✓ Native add-in
Support	✗ Not publicly listed	✓ Live chat, support calls, and onboarding

Microsoft Word integration

Both Gavel Exec and Spellbook are native Microsoft Word add-ins. Lawyers open either product directly inside Word and work without switching to a separate application. This parity matters for adoption, since legal teams aren't asked to change where they work.

Gavel Exec is also available as a full web application, expanding what's possible beyond a single open document. On the web, lawyers can run batch analysis across multiple contracts, conduct research alongside review, compare agreements side by side, and start analysis before a document is even open in Word.

Playbook flexibility

Both tools support custom playbooks, which are firm-specific rules the AI uses to review contracts against your positions. The difference is in how those playbooks are built and maintained.

Spellbook's playbooks capture instructions for how the AI should review a document. They can be saved and reused across matters, and are particularly useful for in-house teams with standard review criteria. Spellbook offers a Playbook Build Service for teams that want hands-on setup support and are willing to pay for it and wait for the build.

Gavel Exec's playbooks can be generated with AI, built manually, or you can use lawyer-built playbooks that are included by default. All playbooks are always lawyer-editable. Any attorney can use AI to generate a playbook from a contract type or practice area description in minutes, then refine positions and fallback language without admin involvement. For firms without dedicated legal ops, this means playbooks are faster to create and easier to keep current as positions evolve. Each workspace can share playbooks across their organization with granular access control (read-only vs. edit access).

AI contract drafting

Spellbook includes AI drafting tools: clause generation from natural-language prompts, complete agreements from scratch, and Compare to Market benchmarking against a live database of recently negotiated agreements. The Associate agent handles multi-document tasks as well.

Gavel Exec's AI goes deep on drafting and review: drafting from scratch, rewriting clauses, referencing past agreements, analyzing current agreements against your playbook, identifying risks, suggesting redlines, and flagging missing clauses. The platform supports both the focused review of a single contract in Word and broader analysis across a full portfolio of agreements on the web.

Pricing

Spellbook: ~$350/seat/mo

Word add-in and online
AI review, drafting, Compare to Market benchmarking, and Associate AI agent
Playbooks included; Playbook Build Service available for teams
~$350/seat/mo with a 6-month commitment required (user-reported)
Roughly $2,100 committed upfront per seat
Trial access requires a sales call

Gavel Exec: $160/seat/mo

Word add-in and full web application
AI-generated, built-in, and lawyer-editable playbooks (built by practicing deal attorneys)
Batch and multi-document analysis on web
No long-term commitment required
Free trial with 25 queries per user, no credit card, no sales call required
Discounted pricing available for teams with 10+ seats or users who are also Gavel Workflows customers
$1,740/user billed annually

Spellbook reviews

Spellbook is rated positively by lawyers who use it for commercial contract work. Commonly cited complaints among users who evaluated or switched tools are the pricing, legal-domain accuracy, the commitment requirement ~$350/mo with a 6-month minimum, and the sales call required before accessing a trial.

Both products carry strong ratings from legal-specific review platforms. Lawyerist evaluates tools specifically for legal professionals. Gavel Exec scores higher.

Spellbook: 4.1/5 on Lawyerist
Gavel Exec: 4.5/5 on Lawyerist

Gavel Exec is like having another assistant with you who hears your voice, understands what you want, and gives you whatever you need in seconds.
Omar Nakadi, Legal Counsel

Switching from Spellbook

Firms that switch from Spellbook to Gavel Exec often cite legal-specific accuracy, faster product improvements, better pricing, easier evaluation, and the ability to start without a sales call or long-term commitment. At ~$350/mo per seat with a 6-month commitment, Spellbook requires roughly $2,100 upfront per seat before you know if the tool works for your practice. Gavel Exec is $160/mo with no commitment and no sales call required to start. Migration is straightforward: use Gavel Exec’s AI playbook builder to generate a playbook from your contract type or existing positions, refine it, and your lawyers can review their first contract the same day.

Try Gavel Exec free

Review, redline, and draft contracts in Word or online with precedent-based AI.

25 queries per user. No credit card required.

Start free trial Get a demo

Frequently asked questions

How does Spellbook Legal AI's pricing compare to other AI contract review software and tools?

Spellbook does not publicly list its pricing. Based on user reports, Spellbook costs approximately $350/mo per user with a 6-month commitment required, meaning roughly $2,100 per seat committed upfront. Gavel Exec pricing is publicly listed at $160/seat/mo (or $1,740/year billed annually), more than 50% less per seat, with no commitment required.

Does Spellbook offer a free trial?

Spellbook's sign-up form appears self-serve but routes to a required discovery call before any trial access is granted. Gavel Exec offers 25 free queries per user with no credit card and no sales call required. You can start reviewing contracts today.

Does Spellbook offer team or volume discounts?

Spellbook does not publish team pricing publicly. Gavel Exec has a published pricing page and offers discounted pricing for teams with 10 or more seats and for existing Gavel Workflows customers.

Does Spellbook work inside Microsoft Word?

Yes. Spellbook is a native Microsoft Word add-in. Gavel Exec is also available as a Word add-in and additionally offers a full web application with batch analysis across multiple contracts, multi-document comparison, and research tools on the web.

Does Spellbook work in a web browser?

Spellbook is primarily a Word add-in with some online access. Gavel Exec is available both as a Microsoft Word add-in and as a full web application, with batch analysis, multi-document comparison, and research tools on the web.

Does Spellbook work on Mac and Windows?

Spellbook runs inside Microsoft Word, which is available on Mac and Windows. Gavel Exec is available everywhere Microsoft Word is available, including Mac, Windows, and the web.

Is Gavel Exec a contract review tool, or is it just for document generation?

Gavel Exec is built specifically for contract review: analyzing third-party paper against your playbook, flagging risks, generating redlines, and producing summaries. Document automation is a separate Gavel product called Gavel Workflows. Gavel Exec and Spellbook are direct competitors on AI contract review.

Does Spellbook include contract drafting tools?

Spellbook includes AI drafting tools: generating clauses from prompts, full agreements from scratch, and the Associate agent for multi-document workflows. Gavel Exec is optimized for both drafting from scratch, rewriting clauses, and review depth. For teams evaluating the two, the right choice depends on how much you are willing to pay and what personal preferences you have.

Is Spellbook better for law firms or in-house legal teams?

Spellbook's Compare to Market benchmarking and drafting tools are well-suited for practices that frequently originate agreements, at both law firms and in-house teams. Gavel Exec is built for teams that spend most of their time reviewing and negotiating counterparty paper, with deep playbook-based review, AI redlines, and batch analysis. The right choice depends on whether your primary work is originating agreements or analyzing them.

How customizable are Spellbook's playbooks?

Spellbook's playbooks capture review instructions and can be saved and reused. Spellbook offers a Playbook Build Service for in-house teams that want setup support for a premium. Gavel Exec's playbooks include built-in playbooks by practicing deal lawyers as well as playbooks that can be generated with AI in minutes or built manually. Gavel Exec's playbooks are always lawyer-editable. Any attorney can update positions without admin involvement.

Can Spellbook handle batch analysis and multi-document review?

Spellbook's Associate agent handles multi-document workflows. Gavel Exec supports batch analysis across multiple contracts and multi-document comparison on the web.

Does Spellbook let my data be accessed by the AI models they use?

Both Spellbook and Gavel Exec have zero data retention policies. Gavel Exec's is backed by formal Zero Data Retention agreements with all AI providers, meaning your contract data is contractually guaranteed never to be stored by AI providers, used for training, or retained after your session ends.

How long does it take to get started with Spellbook?

Spellbook requires a discovery call before granting trial access, so setup begins after scheduling and completing that call. Gavel Exec can be installed and running in under 2 minutes with no sales call required. The AI playbook builder lets any attorney generate a playbook in minutes, with no legal ops or admin required. Trial users can also use built-in playbooks created by practicing deal lawyers.

Can I migrate my playbooks if I switch from Spellbook to Gavel Exec?

Yes. Use Gavel Exec's AI playbook builder to generate a new playbook from your files, instructions, contract type, and existing positions. Or, you can build a playbook manually. All of Gavel Exec's playbooks are lawyer-editable. Most teams are reviewing their first contract the same day they switch.

Who built Gavel Exec?

Gavel Exec was founded by Dorna Moini, a former Sidley Austin attorney, and CTO Pierre Martin, previously at Microsoft and Amazon. Pierre writes about building legal-specific AI on his Substack, Pierre Martin on AI.

Does Spellbook or Gavel Exec have better reviews?

On Lawyerist, which evaluates tools specifically for legal professionals, Gavel Exec scores 4.5/5 vs. Spellbook's 4.1/5.

How we researched this

This comparison is based on publicly available information: product documentation, customer reviews on Lawyerist, G2, and Capterra, and legal technology coverage. It also reflects direct conversations with prospects who evaluated alternatives before choosing Gavel Exec, and with customers who have used both.

Where vendors don't publish pricing, we use user-reported figures and note it. Information is current as of 2026. Verify pricing and features directly with any vendor before deciding.