BlackBoiler vs. Gavel Exec (2026): Automated Pipeline vs. Interactive AI Review

BlackBoiler and Gavel Exec both automate contract redlining and produce tracked changes in Microsoft Word. BlackBoiler is built for high-volume enterprise workflows with custom pricing and a required onboarding process. Gavel Exec is $160/seat/mo with no commitment required, and a 25-query free trial you can start without a credit card or sales call.

By Danae Martin · Updated: May 22, 2026

BlackBoiler and Gavel Exec are both AI tools that review contracts and produce tracked changes in Microsoft Word. Both support custom playbooks and both aim to reduce the time attorneys spend on contract markup. The differences are in who they are built for, how buyers access them, and what the tools do beyond redlining. BlackBoiler is a processing pipeline built for enterprise automation at scale, with custom pricing and a required implementation process. Gavel Exec is an interactive Word add-in and web application with transparent pricing, drafting tools, and an AI chat interface, available through a self-serve free trial. This page covers both tools across platform, playbooks, AI capabilities, pricing, and access model.

BlackBoiler

BlackBoiler is an AI-powered automated contract markup tool built for high-volume legal teams. It redlines contracts using playbooks built from historical markups and customized negotiation rules, and outputs tracked changes directly to Microsoft Word. The platform includes a playbook builder, smart clause library, bullseye editing for precedent-based review, contract routing, and a data dashboard for tracking usage and efficiency metrics. Pricing is custom and requires a demo to get started.

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: Gavel Exec is $160/seat/mo or $1,740/year. BlackBoiler pricing is custom, based on redline volume, and not publicly listed (user-reported).
Commitment: Gavel Exec is month-to-month with no long-term commitment required. BlackBoiler contract terms are not publicly disclosed.
Trial access: Gavel Exec offers 25 free queries per user with no credit card and no sales call. BlackBoiler requires a demo and a custom onboarding process before access.
Platform: Gavel Exec is a native Word add-in plus a full web application with batch analysis and multi-document comparison. BlackBoiler processes contracts through a submission model and returns them redlined in Word Track Changes; it is not a native Word add-in and does not have a web application for interactive review.
Playbooks: Both tools support playbook customization. BlackBoiler offers a playbook builder with 200+ pre-built rules and an expert-build service. Gavel Exec generates playbooks with AI in minutes, includes lawyer-written defaults, and allows any attorney to edit playbooks without admin involvement.
AI capabilities: Gavel Exec includes AI contract review, redlining, clause rewriting, drafting, and an interactive chat interface in Word. BlackBoiler focuses on automated redlining and does not include drafting tools or a chat interface.
Built by: Gavel Exec was built by Dorna Moini (former Sidley Austin litigation associate) and Pierre Martin (ex-Microsoft Research, ex-Amazon). BlackBoiler was founded by Dan Broderick J.D., a former Kilpatrick Townsend attorney.
Ratings: Gavel Exec is rated 4.5/5 on Lawyerist. BlackBoiler is rated 4/5 on G2 based on 4 reviews.

When evaluating the legal tech company BlackBoiler,

BlackBoiler is an AI-powered automated contract redlining tool built for high-volume enterprise legal teams. Pricing is custom and based on redline volume; it is not publicly listed (user-reported). Getting started requires a demo and a dedicated implementation process that includes uploading historical contracts, building a playbook, and completing onboarding with BlackBoiler's team. The tool processes contracts through a submission model and returns them as redlined Word documents with tracked changes; it does not function as a native Word add-in. BlackBoiler includes a playbook builder with access to over 200 pre-built rules, a smart clause library, bullseye editing for aligning new contracts with a specific precedent document, contract routing, and analytics. It does not include drafting tools, clause generation, or an interactive AI chat interface. No free trial is available without a sales engagement.

Gavel Exec was built by Dorna Moini, a former employment litigation associate at Sidley Austin, and Pierre Martin, formerly of Microsoft Research and Amazon and author of Pierre Martin on AI. It is available as a native Microsoft Word add-in and as a full web application that supports batch analysis across multiple contracts, multi-document comparison, and research tools. Playbooks can be AI-generated in minutes from a contract type or practice area, built manually, or loaded from built-in lawyer-written defaults; attorneys can edit playbooks without admin involvement, and access controls allow read-only or edit permissions by user. Gavel Exec is priced at $160/seat/mo, or $1,740/year billed annually, with month-to-month terms. A free trial is available with 25 queries per user, no credit card required, no sales call required.

When to choose BlackBoiler vs. Gavel Exec

When to choose BlackBoiler

Your team processes a high volume of contracts that follow consistent templates and you need automation to handle the volume without attorney review on every document.
You need CLM or DMS integration and want contracts to move through existing systems automatically via email or API.
You have dedicated legal ops or IT resources to manage a custom implementation and onboarding process.
Your organization wants to codify institutional knowledge from historical redlines across large teams, multiple regions, or multiple practice groups.
You are a large enterprise where custom volume-based pricing makes more financial sense than a per-seat model.

When to choose Gavel Exec

You want to know the price before talking to anyone. Gavel Exec is $160/seat/mo with pricing published publicly and no commitment required.
You want to try the product without a sales process. The free trial includes 25 queries per user, starts immediately, and requires no credit card.
You need both contract review and drafting in one tool. Gavel Exec includes AI redlining, clause rewriting, drafting, and an interactive chat interface in Word.
Your attorneys need to edit and own their playbooks directly, without involving IT or an admin to make updates.
You are an in-house legal team or law firm handling M&A, commercial contracts, real estate, or complex transactional work and want AI trained on legal precedent rather than a submission pipeline.
You want formal contractual guarantees that your contract data is never stored or used for AI training after a session ends.

Side-by-side comparison

BlackBoiler pricing is custom and based on redline volume; the company does not publish pricing publicly (user-reported). Gavel Exec is $160/seat/mo, or $1,740/year billed annually, with month-to-month terms and no long-term commitment required. Both tools output tracked changes in Microsoft Word. Gavel Exec adds a native Word add-in for interactive review and drafting, plus a web application with batch analysis across multiple contracts, multi-document comparison, and research tools.

Feature	BlackBoiler	Gavel Exec
Price	Custom pricing based on redline volume; not publicly listed (user-reported)	✓ $160/seat/mo, no commitment
Commitment	Not publicly disclosed (user-reported)	✓ Month-to-month
Free Trial	Demo and custom onboarding required to access the product	✓ 25 queries/user, no card required
AI Features	Automated redlining and playbook markup; no drafting or chat	✓ Review, redline, draft, playbooks
Playbooks	Playbook builder with 200+ pre-built rules; expert build option available	✓ AI playbook generator
Word Integration	Outputs tracked changes to Word via submission model; no native add-in	✓ Native add-in
Support	Dedicated onboarding team; ongoing support tier not publicly listed	✓ Live chat, support calls, and onboarding

Platform and access

Gavel Exec is a native Microsoft Word add-in. You install it from Microsoft AppSource, open it in Word, and work on contracts interactively: reviewing, redlining, rewriting clauses, and chatting with the AI without leaving the document. Alongside the Word add-in, Gavel Exec includes a full web application for batch analysis across multiple contracts, multi-document comparison, and research tools.

BlackBoiler works differently. Rather than a native add-in, it processes contracts through a submission model: you submit a contract, BlackBoiler applies your playbook, and returns a redlined Word document with tracked changes. BlackBoiler integrates with CLM and DMS platforms via email and API, which suits teams that process contracts programmatically or at high volume through existing systems. There is no web application for interactive review or drafting.

Playbook flexibility

Both tools support custom playbooks, but the build process differs. BlackBoiler's playbook builder lets teams create rules from scratch, upload past contracts for the system to learn from, answer guided questions about common clauses, or pull from a library of over 200 pre-built rules. BlackBoiler also offers an expert build service where their team analyzes historical contracts and creates a playbook on your behalf. Playbooks update over time as the system learns from new redlines.

Gavel Exec playbooks can be AI-generated in minutes from a contract type or practice area, loaded from built-in lawyer-written defaults, or built manually. Any attorney on the team can edit playbooks directly, without admin involvement. Granular access controls let teams assign read-only or edit permissions by user. Teams that want to iterate quickly on playbook language without a workflow ticket or system admin find this approach faster in practice.

AI contract review and drafting

Both tools use AI to review contracts against a playbook and produce tracked changes. Where they diverge is in what they do beyond redlining. BlackBoiler focuses on automated markup: applying your negotiation positions at scale, consistently, across high volumes of contracts. It includes a smart clause library for one-click access to standard clauses and bullseye editing for aligning a new contract to a specific precedent document. It does not include clause drafting, clause generation, or an interactive AI chat interface.

Gavel Exec includes AI review and redlining, but also drafting, clause rewriting, benchmarking against market standards, contract summaries, and an interactive AI chat interface directly in Word. Lawyers can ask questions, request rewrites, and get explanations without switching tools. For in-house teams that need to both review incoming contracts and draft or revise their own language, this breadth matters.

Pricing

BlackBoiler: custom pricing, demo required

Processes contracts through a submission model; outputs tracked changes in Word; integrates with CLM and DMS platforms via email and API
AI-powered automated redlining, playbook builder, smart clause library, bullseye editing, contract routing, analytics dashboard
Pricing is custom and based on redline volume; not publicly listed (user-reported)
Commitment terms not publicly disclosed
No free trial; demo and custom onboarding required to get started

Gavel Exec: $160/mo, no commitment, free trial

Native Microsoft Word add-in plus full web application for batch analysis, multi-document comparison, and research tools
AI contract review, redlining, drafting, clause rewriting, benchmarking, summaries, and interactive chat in Word
AI-generated playbooks; built-in lawyer-written defaults; attorney-editable without admin involvement
$160/seat/mo, or $1,740/year billed annually
Month-to-month, no long-term commitment required
25 free queries per user, no credit card required, no sales call required
Discounted pricing for teams of 10+ seats and for existing Gavel Workflows customers

BlackBoiler reviews

BlackBoiler is rated 4/5 on G2 based on 4 reviews. Reviewers cite time savings and playbook automation as strengths. Common feedback notes that pricing lacks transparency and that implementation requires significant upfront effort.

G2 collects verified user reviews from business software buyers. Lawyerist is an independent publication that evaluates legal technology for practicing attorneys.

BlackBoiler: 4/5 on G2 based on 4 reviews
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 BlackBoiler

Lawyers who switch from BlackBoiler to Gavel Exec most often cite two reasons: pricing transparency and the need for tools beyond redlining. BlackBoiler does not publish pricing, which makes it difficult to budget or compare options without going through a sales process first. Teams that need to review, draft, rewrite, and chat with AI inside Word find that BlackBoiler's automated submission pipeline does not cover those workflows.

Switching is straightforward. Gavel Exec's AI playbook generator builds a playbook from a contract type or practice area in minutes, and built-in lawyer-written defaults are available on day one. There is no playbook migration from BlackBoiler's format; Gavel Exec generates playbooks from your parameters rather than importing from another system. Most teams are reviewing contracts the same day they sign up.

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 BlackBoiler's pricing compare to other AI contract tools?

BlackBoiler pricing is custom and based on redline volume; the company does not publish pricing publicly (user-reported). Most AI contract review tools, including Gavel Exec, publish pricing on their websites. Gavel Exec is $160/seat/mo, or $1,740/year billed annually.

Does BlackBoiler offer a free trial?

No. Getting started with BlackBoiler requires requesting a demo and completing a custom onboarding process. There is no self-serve free trial. Gavel Exec offers 25 free queries per user with no credit card and no sales call required.

Does BlackBoiler offer team or volume discounts?

BlackBoiler pricing is custom and based on volume, so pricing likely reflects scale, but specific discount terms are not publicly listed (user-reported). Gavel Exec offers discounted pricing for teams with 10 or more seats and for existing Gavel Workflows customers.

Does BlackBoiler work inside Microsoft Word?

BlackBoiler outputs tracked changes to Word documents but does not function as a native Word add-in. You submit a contract to BlackBoiler's system and it returns a redlined Word document. Gavel Exec is a native Word add-in: you install it from Microsoft AppSource and work on contracts interactively within Word without leaving the document.

Does BlackBoiler work in a web browser?

BlackBoiler does not have a standalone web application for interactive contract review. It processes contracts through a submission model and integrates with CLM and DMS platforms via API and email. Gavel Exec includes a full web application alongside its Word add-in, with batch analysis across multiple contracts, multi-document comparison, and research tools.

Does BlackBoiler work on Mac and Windows?

BlackBoiler's submission-based model is platform-agnostic since it processes contracts via email or API. The tracked changes it produces are in Word format, accessible on both Mac and Windows. Gavel Exec's native Word add-in works on both Mac and Windows.

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

Gavel Exec is an AI contract review, redlining, and drafting tool for in-house counsel and legal teams. It is a separate product from Gavel Workflows, which is Gavel's document automation tool for law firms. Gavel Exec does not generate intake-based documents; it reviews, redlines, and drafts contracts.

Does BlackBoiler include contract drafting tools?

No. BlackBoiler focuses on automated redlining and does not include clause generation, contract drafting, or clause rewriting tools. Gavel Exec includes AI-powered drafting, clause rewriting, and the ability to generate new language from scratch inside Word.

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

BlackBoiler's published case studies focus on enterprise in-house legal teams and large organizations that process high volumes of contracts through automated workflows. Gavel Exec is designed for both in-house legal teams and law firms, particularly those handling M&A, commercial contracts, real estate, and complex transactional work.

How customizable are BlackBoiler's playbooks?

BlackBoiler's playbook builder allows teams to create rules from scratch, upload past contracts for the system to learn from, answer guided questions, or import from a library of over 200 pre-built rules. An expert build service is also available. Gavel Exec playbooks can be AI-generated in minutes, loaded from built-in lawyer-written defaults, or built manually. Any attorney can edit playbooks directly without admin involvement, and access can be set to read-only or edit per user.

Can BlackBoiler handle batch analysis and multi-document review?

BlackBoiler is designed for high-volume processing and can handle large batches of contracts through its submission model and API integrations with CLM and DMS platforms. Gavel Exec's web application includes batch analysis across multiple contracts and multi-document comparison tools.

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

BlackBoiler's data handling page states that client data is not shared with any third party, is stored on AWS with AES256 encryption, and is accessible only to the client and necessary BlackBoiler staff. Their published documentation does not address whether contract data is used for AI model training or whether formal zero data retention agreements are in place with AI providers. Gavel Exec holds formal Zero Data Retention agreements with all AI providers: contract data is contractually guaranteed never stored, never used for training, and never retained after the session ends.

How long does it take to get started with BlackBoiler?

BlackBoiler requires a demo, a data transfer period to upload historical contracts or build a playbook, model creation, a consistency review, and a one-hour training session before going live. Timeline varies by organization. Gavel Exec is available immediately through a self-serve free trial; most teams are reviewing contracts the same day they sign up.

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

Gavel Exec does not import playbooks from BlackBoiler's format. Gavel Exec's AI playbook generator builds a new playbook from a contract type or practice area in minutes. Built-in lawyer-written defaults are available on day one, and attorneys can refine and expand playbooks as they review contracts.

Who built Gavel Exec?

Gavel Exec was built by Dorna Moini, CEO, a former employment litigation associate at Sidley Austin, and Pierre Martin, CTO, who previously worked at Microsoft Research and Amazon and writes about legal AI on his Substack, Pierre Martin on AI.

Does BlackBoiler or Gavel Exec have better reviews?

Gavel Exec is rated 4.5/5 on Lawyerist, an independent legal technology publication. BlackBoiler is rated 4/5 on G2 based on 4 reviews. Both are specialized tools in a narrowly defined category, and review volume on major platforms is limited for both.

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.