Spellbook vs LegalOn: playbooks from your documents or an attorney library

Spellbook, LegalOn and Gavel Exec side by side

The last column shows Gavel Exec as a labeled third option.

Who writes the playbook on day one?

With LegalOn, its attorneys have already written it. The LegalOn playbooks page lists 135+ playbooks built by its attorneys and kept current as laws and standards change, grouped into nine categories: data protection, services, software, goods, channel, leases, construction, research and general. LegalOn's review ranks each finding as Low, Medium or High importance.

LegalOn's April 7, 2026 release added International Playbooks covering review standards in 23 countries, written by its internal legal team and reviewed by retained attorneys in each jurisdiction. One number to confirm in a demo: LegalOn's law firm page and its attorney content page also describe "50+" ready-to-use playbooks, so ask how many of the 135+ apply to your contract types and plan.

Spellbook starts from the other end. Its help center describes Playbooks as guided reviews based on specific rules and questions, drawn from a built-in library or from your firm's own, and it does not publish how many built-in playbooks it ships. Its site puts the weight on rules you save (preferred language, fallback positions and flagging criteria for each clause), applied as redlines under the reviewing lawyer's name.

A legal department with no written positions gets further on the first day with LegalOn.

Getting your own positions into each tool

Both products accept your standards, through different doors. Spellbook builds a playbook from a document: per its help center, you upload a model agreement in Word or PDF (or an existing playbook on its Excel template), choose which party the playbook should favor and the jurisdiction, and Spellbook generates rules you then edit. The Playbook Build Service on Spellbook's pricing page appears under in-house plans only.

LegalOn has two routes. My Playbooks takes instructions written in plain English, and its help center says results come back as MET, UNMET or UNSURE for each requirement. The same article says the AI reads only the instruction field (model language and fallback positions are reference notes for the reviewer) and that playbooks are configured in the web browser. Playbook Agent, documented in March 2026, converts an existing playbook in .docx or .xlsx into LegalOn's format, with a version 1 limit of 100 instructions and 10 MB per run.

Spellbook also works from your documents outside of playbooks. Its Library stores precedent clauses you upload, and Draft pulls from that Library or writes from scratch. Its review page says "Spellbook learns your preferences" when recommending redlines, without explaining the mechanism, so ask how it works on a shared team account.

If your starting material is a signed agreement or a model form, Spellbook's route is shorter. If it is a negotiation playbook in a spreadsheet, both import it, and LegalOn layers it on top of the attorney-written library in the same review.

Market data versus attorney guidance

Spellbook is the one with a market data product. Compare to Market shows how common a term is and what alternatives exist, with percentage breakdowns, across thousands of similar agreements from a pool that Spellbook says spans 80+ countries and hundreds of industries. Filters cover industry, jurisdiction and deal type, and results appear in Word. Spellbook's announcement of the feature explains the terms: it is free if you contribute anonymized data and carries a fee if you keep your data out.

LegalOn answers the question "is this clause acceptable?" with its attorneys' view. Its site describes practice notes and sample clauses behind every playbook issue and says its AI is anchored in content that attorneys wrote and tested. We found no description of a cross-customer market data pool on legalontech.com, so a team that must tell a counterparty what share of deals include a term should test a tool with market data first.

What surrounds the review: legal operations or deal work

LegalOn has grown into a platform for the whole in-house desk. Beyond Review and Playbooks, its navigation lists Assistant, Matter Management, Vault, Translation, Entity Management and Board Management. Matter Management collects requests from Slack, email and web forms, with an Intake Agent that handles the first conversation and a Triage Agent that screens agreements against approved playbooks. Vault stores signed agreements, extracts key data, flags renewal and expiration dates, and runs Vault Projects across a contract set.

Translation is the module with no Spellbook equivalent. LegalOn produces an English version of a foreign-language contract for review and translates only your edits back into the original language, across 30+ languages by its Translate page. Spellbook says its suite reviews, drafts and chats in 140+ languages, a different job from returning a redline in the counterparty's language.

Spellbook's extras point toward the deal. Associate is an agent for multi-document projects (its page names financing documents, data room reviews, employment packages and disclosure schedules) and can update a whole document set at once. Ask returns cited answers from public legal sources, CourtListener and CanLII among them. Spellbook also connects to iManage, honoring existing permissions and ethical walls.

Word, browser or Google Docs

Both run inside Microsoft Word. LegalOn's integrations page describes review, redlining, drafting and questions in the document, with one-click AI Revise built on Word's native track changes, and the same review is available in a browser editor for .docx and PDF files.

Spellbook is the choice for Google Docs. Its Google Docs add-on is in beta and supports Reviews, Playbooks and Ask, while the Word add-in carries the full set of Review, Draft, Ask, Playbooks and Compare. Spellbook's install article lists Draft and Compare to Market as unavailable in the beta, so test it on a live contract.

Price and trial: two unpublished prices, two 7-day trials

Neither vendor shows a dollar figure. Spellbook's pricing page bases the price on the number of team members on a license and offers a 7-day trial or a demo. Gavel customers who received Spellbook quotes report about $350 per user per month, the one figure we have.

LegalOn's pricing page names three plans. Core Review covers unlimited AI review and redlining with the 135+ pre-built playbooks. Contracting Suite adds My Playbooks, Playbook Agent, Vault, dedicated support and enterprise single sign-on. Productivity Suite adds Matter Management and the intake and triage agents. The page's description promises per-seat plans, zero implementation fees and no per-contract charges, and Translation appears in none of the three plan lists. Because My Playbooks sits in the second plan, a team that wants its own positions applied should price Contracting Suite.

On trials, Spellbook is clearer. Its help center says trials begun on the website end automatically after 7 days at no charge. LegalOn has a landing page headed "Try LegalOn for Free" that offers a 7-day free trial without stating which plan it covers or any conditions, while its homepage and pricing page offer only "Book a Demo." Ask LegalOn in writing what the trial includes before you plan a test around it.

Security and where your contracts are stored

LegalOn lists more certifications and more regions. Its security page states SOC 2 Type II certification plus certification under two ISO/IEC standards (27001:2022 and 27017:2015), and names Amazon Web Services and Google Cloud Platform as its hosts in the United States. A company update last revised in April 2026 adds dedicated hosting in Germany and Singapore, with customer data stored and processed in-region. LegalOn says the Azure OpenAI service it uses stores no customer data and trains no models on it.

Spellbook's security page lists SOC 2 Type II compliance and says OpenAI and Anthropic have both agreed to zero data retention. Storage and processing happen in Canadian and United States data centers, mainly on Amazon Web Services, and Spellbook will sign a business associate agreement for work involving protected health information. A European or Asia-Pacific company with a residency requirement has a documented option at LegalOn and should ask Spellbook what it can offer.

Which should you choose?

• Choose Spellbook if you negotiate commercial contracts, whether in private practice or for one company, and want playbooks generated from your own model documents, market data behind your positions, Google Docs support or an agent for multi-document deals, and you want to start a 7-day trial from the website.
• Choose LegalOn if you lead an in-house team that wants attorney-written playbooks ready on the first day, review standards for contracts under foreign law, redlines translated back into the counterparty's language, intake and matter tracking in the same system, or data residency in Germany or Singapore.
• Consider Gavel Exec if you want both playbook starting points, Word redlines, benchmarking and a price you can read before talking to anyone: $160 per user per month, month to month, with 25 free queries per user.

A third option: Gavel Exec, with both kinds of playbook and a published price

Neither Spellbook nor LegalOn lists a price, so the quotes you collect have no public number beside them. Gavel Exec, the AI contract review and drafting software Gavel makes, prints its price and covers both starting points: attorney-developed playbooks like LegalOn's and rules built from your own documents like Spellbook's. Its users are transactional attorneys, in-house legal teams, and solo, small and mid-sized firms who work in Word.

• Published price: $160 per user per month, or $1,740 per user per year, a figure you can set beside each quote. Every paid seat comes with 1,000 queries a month, billed month to month with no long-term contract. The Gavel Exec pricing page has the details.
• Playbooks: start from the built-in playbooks, developed with attorneys in corporate and real estate law, or upload a checklist, a spreadsheet playbook or signed agreements (.docx, PDF or .csv) and Gavel Exec generates the rules from them. Sharing is read-only or with edit access, and one set of organization-wide instructions covers every chat and playbook.
• Trial: the first 25 queries for each user are free, with no credit card and no sales call, so you can test the same contract while the other two quotes are pending.
• The redline: Gavel Exec sends the whole agreement back in Word with tracked changes in priority order, explains the reasoning behind each change, writes margin comments and lists missing terms.
• Benchmarking: in the web app, every provision gets an on-market, off-market or missing label, filterable by jurisdiction, industry and company size.
• Security: Gavel Exec is certified under SOC 2 Type II, the standard Spellbook and LegalOn both list. No AI model is ever trained on your data, and OpenAI and the other AI model providers Gavel uses have signed Zero Data Retention agreements. Your database and file storage are isolated from other customers', hosted in the United States unless you choose the EU, Canada or Australia. See Gavel's security page.
• Results: Martin Algie's first-cut review at MIA Contract Lawyers in Australia dropped from about 15 hours per contract to about 5. Omar Nakadi, Legal Counsel at a regulated financial services firm, puts his saving at 40 to 60% of the review time on each contract.
• Who built it: Legal organizations in 28 countries, over 2,000 of them, use Gavel. Dorna Moini, its CEO and Founder, worked as a litigation associate at Sidley Austin before founding it.

Transactional work is what Gavel Exec is built for: its source checks run against your own precedent and matter files, SEC EDGAR filings and government sources in place of a case-law research database, and litigation and e-discovery are handled by Relativity, Gavel's parent company. The one-on-one comparisons are Spellbook vs Gavel Exec and LegalOn vs Gavel Exec.

How to test them side by side

1. Pick two contracts you have already negotiated. Use one common type LegalOn's library covers, such as a vendor master services agreement, and one unusual agreement where your own positions matter more.
2. Run the library test. Review the first contract against LegalOn's matching attorney-built playbook, Spellbook's closest built-in playbook and a Gavel Exec built-in playbook, and count the findings you would have acted on.
3. Run the own-positions test. Give each tool the same source: your model form or playbook spreadsheet. Generate a Spellbook playbook from the model document, convert the spreadsheet with LegalOn's Playbook Agent, and upload the same file to Gavel Exec. Time each setup, then compare the redlines on the second contract with the markup you sent.
4. Check one market question. Take a limitation of liability clause and ask each tool whether it is standard. Note whether the answer rests on market data or on attorney guidance.
5. Get the commercial terms in writing. From Spellbook: the per-user price, any seat minimum and the Compare to Market fee if you will not contribute data. From LegalOn: the plan that includes custom playbooks, Translation and Vault, its price, the contract term and what the 7-day trial covers.

More comparisons: Spellbook alternatives, LegalOn alternatives, Gavel's guide to contract playbook software, Gavel Exec for in-house counsel and all Gavel comparison pages.