LegalSifter vs. Gavel Exec: Automated Redlines at Volume or Negotiating in Word?

LegalSifter redlines a steady flow of standard contracts against its playbooks on annual plans. Gavel Exec helps lawyers review, redline and draft in Word, priced per seat. Here’s which fits your team.

By Richard Poelderl · Last updated: November 14, 2026

Choose LegalSifter if your legal, procurement or contracts team handles a steady volume of standard third-party agreements and wants each one fully redlined against a playbook, with unlimited seats priced by contract volume and attorney redlining services from the same vendor. Choose Gavel Exec if your lawyers negotiate and draft in Word, on Windows, Mac or the web, and want to start this week on a monthly plan: 25 free queries and no credit card, then $160 per user per month.

LegalSifter is the company; ReviewPro is the name of its AI contract review product, and LegalSifter Control its contract management product. This comparison covers ReviewPro as published on November 14, 2026.

LegalSifter

LegalSifter, Inc. is a Pittsburgh company founded in 2013 out of Carnegie Mellon University. Its AI contract review product, ReviewPro, fully redlines a contract against a playbook in Microsoft Word or Google Docs, with a rationale for each edit and optional comments to the counterparty. It combines rules-based code with generative AI, ships 100+ standard playbooks, and sits alongside LegalSifter Control for contract management and attorney-led redlining services. LegalSifter says it has served over 1,500 organizations in more than 30 countries.

Gavel Exec

Gavel Exec is AI contract review, redlining, and drafting software for legal teams. It works in Microsoft Word and online, so attorneys can review contracts inside Word or use browser-based workflows for broader contract analysis.

Gavel Exec supports playbook-based review, redlining, drafting, benchmarking, batch analysis, and multi-document comparison. Playbooks can be generated with AI, built from uploaded files, created manually, or started from built-in playbooks created by practicing attorneys. Gavel Exec publishes pricing at $160 per user per month or $1,740 per user annually, and offers 25 free queries per user with no credit card required.

Why teams choose Gavel Exec over LegalSifter

Start this week, monthly, per seat: Gavel Exec is a Word add-in for AI contract review and a browser app you sign up for yourself, with 25 free queries per user, no credit card and a monthly or annual plan. Every LegalSifter subscription is annual, and its 7-day trial is open in the US, Canada and the EU only.
Word on Mac, the web and Windows, plus PDFs in the browser: Gavel Exec runs in Word for Windows, Word for Mac (2016 or later) and Word on the web, and its browser app takes PDF and Word files. LegalSifter’s ReviewPro runs in Word or Google Docs; its pages don’t specify Mac or Word on the web, and PDFs are converted to .docx in Word first.
Market benchmarks, not only your own positions: Gavel Exec marks each provision on-market, off-market or missing for the jurisdiction, industry and company size you choose. LegalSifter reviews against your playbook or its standard ones; its product pages don’t list a market-benchmark view.

Already paying for LegalSifter? Where Gavel Exec fits

Keep LegalSifter for what it is built to do: fully redlining a steady flow of standard agreements against fixed positions, with unlimited seats on its volume plans. Add Gavel Exec seats for lawyers who negotiate the agreements that don’t fit a standard playbook, work in Word for Mac, want market benchmarks, or draft and redraft clauses in the document they are negotiating. A playbook kept as a checklist, policy or signed precedent can seed Exec rules. Neither vendor documents running both Word add-ins together, so test them in your Word setup. At MIA Contract Lawyers, Martin Algie reports first-cut review falling from about 15 hours to about 5 hours per contract with Gavel Exec.

When evaluating the legal tech company LegalSifter,

LegalSifter is AI contract review from LegalSifter, Inc. (Pittsburgh): its ReviewPro product fully redlines a contract against 100+ standard or custom playbooks in Microsoft Word or Google Docs. Plans are annual, from $2,750 a year for 50 contracts with unlimited seats, or $6,000 per seat a year with unlimited contracts; the trial runs 7 days in the US, Canada and the EU. Gavel Exec is AI contract review, redlining and drafting in Word on Windows, Mac and the web, plus a browser app. It starts with 25 free queries and no credit card, then costs $160 per user per month. In both, a lawyer decides on every change.

When to choose LegalSifter or Gavel Exec

When to choose LegalSifter

Choose LegalSifter if your team handles a steady volume of standard third-party contracts, such as vendor, sales, staffing or research agreements, and wants each fully redlined against 100+ standard or custom playbooks in Word or Google Docs, with unlimited seats priced by contract volume, attorney redlining services and a contract repository from the same vendor. Not for you if you want a monthly plan or to start outside the US, Canada and the EU: every LegalSifter subscription is annual and its trial is limited to those regions.

When to choose Gavel Exec

Choose Gavel Exec if your lawyers negotiate and draft in Word, on Windows, Mac or the web, and want AI redlines against built-in or their own playbooks, plus market benchmarking, starting today on a published monthly per-seat price. It suits solo, small and mid-sized firms and small in-house teams. Not for you if you need a native iManage or NetDocuments integration today, which Gavel lists as a reason Exec may not fit yet, or if you want the vendor’s own attorneys to redline contracts for you.

LegalSifter vs. Gavel Exec: pricing, trial and features

Public US terms checked November 14, 2026. LegalSifter prices ReviewPro annually, either by contract volume with unlimited seats or per seat with unlimited contracts; Gavel Exec prices per seat, monthly or annually, with team pricing for 10 or more seats. Sources: LegalSifter ReviewPro pricing and Gavel Exec pricing.

Feature	LegalSifter	Gavel Exec
Price	Volume plans (unlimited seats): from $2,750/year for 50 contracts, $55 per extra contract, up to $40,000/year for 1,000. Seat plans (unlimited contracts): $6,000/seat/year, down to $3,500/seat at 15+ seats.	$160/user/month or $1,740/user/year; 1,000 queries per user per month; team pricing for 10+ seats.
Billing	All subscriptions are annual. Onboarding included; custom playbook work is a separate one-time service.	Month to month, no long-term contract; or $1,740/user/year billed annually.
Free Trial	7 days, up to 20 contracts, no credit card; US, Canada and EU only (FAQ says 14 days).	25 free queries per user; no credit card required.
AI Features	Full automatic redline with a rationale per edit, optional counterparty comments, contract AI assistant; hybrid rules plus generative AI (OpenAI).	Review, priority-ranked redlines, drafting, playbooks, market benchmarking and browser analysis.
Playbooks	100+ standard playbooks; custom playbooks from your templates, past redlines or policies, with a paid playbook service.	Built-in playbooks; rules from .docx, PDF or CSV; manual editing, sharing and import/export.
Word Integration	Microsoft Word add-in and Google Docs; needs current Microsoft 365 or Word. Mac and Word on the web not specified; PDFs converted in Word.	Word add-in for Windows, Mac (2016+), Word on the web and Microsoft 365, plus a web app at exec.gavel.io.
Support	Standard implementation and onboarding included; attorney redlining and playbook services available.	Phone, screen share and email support; demo for security and vendor questions.

LegalSifter and Gavel Exec: ratings and demos

Few public ratings exist for LegalSifter. As listed on Capterra, November 2026, it holds 5.0 out of 5 from two reviews, and as listed on Gartner Peer Insights, 4.0 from two reviews. Two reviews are no basis for a decision; ask LegalSifter for references from teams with your contract types and volume.

LegalSifter offers a recorded ReviewPro webinar from February 26, 2026 and live demos on request. Watch Gavel’s 71-second Exec walkthrough to see a Series A stock investment agreement redlined against an attached term sheet, then a vendor-agreement playbook run with accepted edits appearing as tracked changes. Vendor demonstrations show how a product operates, not how well it compares.

Transcript: Gavel Exec walkthrough (71 seconds)

[0:01] Meet Gavel Exec, the data-driven AI tool for contract redlining and drafting. Built by lawyers right inside Microsoft Word, ask Exec to negotiate your contract to standard market terms or to your preference.

[0:15] Negotiate the agreement and ensure the terms match the attached term sheet. Exec analyzes the contract, any relevant documents from your source database, and drafts suggested language with clear explanations.

[0:31] With Playbooks, lock in your negotiation positions as rules that use your precedent and reliable market benchmarks. Understand gaps with one click and immediately apply changes.

[0:45] Exec draws on thousands of real-world negotiation patterns to give you market-aligned language. And it’s continuously learning from you and your team’s preferences with a collaborative platform.

[0:59] Drive better outcomes with concrete data and reliable issue spotting. Supercharge your contract analysis. Start a free trial of Gavel Exec today.

Gavel Exec contract document beside its review panel in Microsoft Word — Official Gavel Word interface image. It shows the working environment, not the services-agreement scenario above or a comparison test with LegalSifter.

How do LegalSifter and Gavel Exec review a contract?

LegalSifter’s ReviewPro takes the whole document and returns a fully redlined, tracked-change draft based on your playbook, with a rationale for each edit and optional comments to the counterparty embedded in the document. It combines rules-based code with generative AI and draws on Sifters, LegalSifter’s models trained to find specific contract concepts. The aim is to turn around standard agreements with little lawyer time: LegalSifter advertises 90% faster contract reviews.

Gavel Exec works inside the document you are negotiating, as a colleague would. It returns priority-ranked redlines as tracked changes and margin comments, with a list of missing terms and the reasoning behind each change, based on your playbooks and precedent. You accept or reject each change in Word, and you can ask Exec to draft or redraft a clause in the same pane.

Illustration: reviewing a vendor’s master services agreement for the customer

You represent the customer. The vendor’s draft caps its liability at fees paid in the previous three months, with no separate cap for data-protection breaches. Your illustrative playbook calls for a cap of twelve months’ fees and a higher, separate cap for data-protection breaches. The expected redline replaces “three months” with “twelve months”, adds the data-protection cap and explains the change in a comment. You decide whether to accept, edit or reject it, and check the indemnities still fit. Done by hand, this is a clause-by-clause read against your checklist. Both vendors document this playbook-to-redline workflow; this is an evaluation scenario, not a test either product ran.

Playbooks: standard, custom and market benchmarks

LegalSifter includes 100+ standard playbooks that run on day one, and builds new ones from your templates, past redlines or policy documents. Its playbook customization is a separate one-time service, scoped with you. LegalSifter reports an average F1 accuracy score of 95% for its Sifters; that is a vendor-reported figure, not an independent test.

Gavel Exec includes built-in playbooks. You can add rules in plain language yourself, or generate them from your checklists, spreadsheet playbooks or signed agreements (.docx, PDF or .csv), then review and edit them before running. Exec also benchmarks provisions against market terms for the jurisdiction, industry and company size you choose and marks each on-market, off-market or missing.

What do you need to run LegalSifter or Gavel Exec?

LegalSifter’s ReviewPro runs as an add-in in Microsoft Word or in Google Docs. Its help center asks for an up-to-date Microsoft 365 or Word and doesn’t say which Word platforms are covered. PDFs are opened in Word, saved as .docx and then reviewed. ReviewPro edits in the language the contract is written in.

Gavel Exec needs an account at exec.gavel.io; the web app works without a download. To redline a specific document, add the Word add-in from Microsoft AppSource. It runs in Word for Windows, Word for Mac (2016 or later), Word on the web and Microsoft 365; if IT manages Microsoft 365 centrally, an admin may need to enable it.

Does LegalSifter work in Word for Mac or Word on the web?

LegalSifter says ReviewPro runs in Microsoft Word or Google Docs and needs an up-to-date Microsoft 365 or Word, but its pages don’t say whether that covers Word for Mac or Word on the web, so ask LegalSifter before you rely on it. Gavel Exec runs in Word for Windows, Word for Mac (2016 or later) and Word on the web, plus its own browser app.

Can LegalSifter review a PDF?

Yes, after conversion. LegalSifter’s help center says to open the PDF in Microsoft Word, save it as a .docx and then run ReviewPro. Check tables, numbering and footnotes after converting. Gavel Exec’s browser app accepts PDF files directly for benchmarking and as context.

How much does LegalSifter cost vs. Gavel Exec?

LegalSifter publishes ReviewPro list prices, and every subscription is annual. Volume plans include unlimited seats: Basic is $2,750 a year for 50 contracts ($55 per extra contract), Team $7,500 for 150, Business $18,000 for 400 and Enterprise $40,000 for 1,000. Seat plans include unlimited contracts: $6,000 per seat a year for one seat, $4,500 from three seats, $4,000 from eight and $3,500 from fifteen. Onboarding is included; custom playbook work is extra.

Gavel Exec costs $160 per user per month, month to month with no long-term contract, or $1,740 per user per year. Paid plans include 1,000 queries per user per month; before paying, each user gets 25 free queries with no credit card. Teams of 10 or more seats get team pricing. See Exec plans

Which costs less depends on how many people review and how many contracts they see. A few lawyers negotiating varied agreements usually pay less with Exec seats than with LegalSifter’s seat plans. A large group of occasional reviewers handling under 50 standard contracts a year can pay less on LegalSifter’s Basic volume plan, because seats are unlimited.

How much does LegalSifter cost?

LegalSifter publishes ReviewPro list prices, all annual. Volume plans with unlimited seats start at $2,750 a year for 50 contracts; seat plans with unlimited contracts start at $6,000 per seat a year, falling to $3,500 per seat at 15 seats. Custom playbook work is a separate one-time service.

Does LegalSifter have a free trial?

Yes. LegalSifter’s trial page offers ReviewPro free for 7 days, for up to 20 contracts, with no credit card, in the US, Canada and the EU only. Its FAQ mentions 14 days, so confirm the length when you sign up. Gavel Exec starts with 25 free queries per user and no credit card.

Security and data use: LegalSifter vs. Gavel Exec

LegalSifter says ReviewPro is SOC 2 Type II audited and meets HIPAA and FISMA requirements. Its security page says ReviewPro is hosted on AWS, encrypts contract data at rest with AES-256 and in transit with TLS 1.2 or higher, runs its generative features on OpenAI and deletes your contracts within 30 days of the end of a subscription.

Gavel Exec is SOC 2 Type II certified and has Zero Data Retention agreements with the AI model providers it uses, including OpenAI. Data is hosted in AWS in the United States by default, with hosting in the EU, Canada and Australia available. Gavel security

Does LegalSifter use my contracts to train its AI?

Only if you allow it. LegalSifter says your contracts train its models only with your permission, and that any training data is de-identified first. ReviewPro’s generative features run on OpenAI under OpenAI’s business terms.

Does Gavel Exec train AI models on my contracts?

No. Gavel doesn’t use customer data, prompts or documents to train AI models, and it has Zero Data Retention agreements with its AI providers, including OpenAI.

Who makes LegalSifter and Gavel Exec?

LegalSifter, Inc. is based in Pittsburgh and has built contract-specific AI since 2014. It launched ReviewPro in May 2025 and has grown by acquisition, adding the CLM vendors Akorda and Contract Logix and a group of LawGeex’s enterprise clients. Gavel is part of Relativity, which also offers e-discovery software.

Who owns LegalSifter?

LegalSifter, Inc. is a private company in Pittsburgh, founded in 2013 out of Carnegie Mellon University. Carrick Capital Partners invested in March 2023 and took board seats. LegalSifter has since bought Akorda, a group of LawGeex’s enterprise clients and the CLM vendor Contract Logix.

Method: Gavel editorial review. Checked against LegalSifter’s and Gavel’s public pages on November 14, 2026. Gavel publishes this comparison and sells Exec; Gavel has been part of Relativity since June 12, 2026. No hands-on comparative test of the two products was conducted. Corrections: contact Gavel.

It’s the best system I’ve tried, and I’ve tried many. I’ve found Gavel Exec really good to work with and responsive to how I negotiate, how I redline.
Martin Algie, Principal at MIA Contract Lawyers

How to try Gavel Exec on a live contract

Pick an agreement you have already negotiated, so you know its issues. Start from a built-in Exec playbook or generate rules from your checklist, run it in Word and compare the redlines with your own markup. If you use LegalSifter, run the same agreement through ReviewPro and compare what each changes, what you reject and how long checking takes.

Start with 25 free queries and no credit card. If LegalSifter’s redlines already cover your negotiating, another seat may add little. If what you need is a vendor whose attorneys redline a high volume of standard contracts for you, LegalSifter sells that as a service.

Start monthly, without an annual contract

Run a built-in playbook or rules from your checklist on an agreement that doesn’t fit a standard playbook, then stay month to month at $160 per user. 25 free queries per user, no credit card.

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Frequently asked questions

Methodology

This comparison uses publicly available product, pricing, and review information. Features, pricing, and access terms may change, so buyers should verify current details directly with each vendor.