Sirion vs. Gavel Exec: Enterprise CLM or AI Contract Review in Word?

Do Sirion and Gavel Exec both redline against a playbook?

Yes. Sirion’s IssueDetection Agent checks each clause against your playbook positions and flags missing must-have clauses; its Redline Agent then proposes targeted edits with the rationale and playbook guidance, and you approve each change. On later turns, Sirion says it detects counterparty edits made without tracked changes, and it negotiates multi-document contract packages, including service levels, rate cards and tables.

Gavel Exec redlines the whole agreement in Word as priority-ranked tracked changes and comments, based on your precedent and playbooks, with the reasoning behind each change. You accept or reject each one in Word, as with a colleague’s markup.

Both build playbooks from what you already have. AskSirion analyzes the precedent agreements, policies and guidance you upload. Gavel Exec generates rules from checklists, spreadsheet playbooks or signed agreements, or you start from a built-in playbook. Review the generated rules in either product before relying on them.

Illustration: reviewing a vendor’s SaaS agreement for the customer

You represent the customer. The vendor’s draft renews automatically for successive three-year terms unless you give notice 90 days before renewal. Your illustrative playbook allows one-year renewal terms and a 30-day notice period. The expected redline replaces “successive three-year terms” with “successive one-year terms” and “ninety (90) days” with “thirty (30) days”, with a comment explaining why. You decide whether to accept, edit or reject it, and check that the termination and fee clauses 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.

Market benchmarking: what Gavel Exec adds

Gavel Exec’s benchmarking compares each provision with market terms for the jurisdiction, industry and company size you choose, marks it on-market, off-market or missing, and suggests alternative language. It accepts PDF, .docx and .txt files. Sirion’s negotiation tools give insight into your own negotiation trends and legacy positions and track risk across versions; Sirion doesn’t describe benchmarking against outside market data. Either way, a lawyer decides whether a market position suits the deal.

What do you need to run Sirion or Gavel Exec in Word?

Sirion for Word is listed on Microsoft’s marketplace as compatible with Windows, macOS, and desktop and browser versions of Word. Sirion’s setup guide lists Microsoft Word 2019 or newer, an active Sirion CLM platform subscription and administrative access to install Word add-ins, plus an established clause library in Sirion CLM and defined legal playbooks and approval workflows.

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.

Languages: Sirion says it supports contracts in over 100 languages. Gavel Exec lets you set the country and state or province for drafting and review, and asks teams working with contracts in another language to talk to Gavel first.

Can I use Sirion for Word without a Sirion subscription?

No. The add-in is free to install, but Sirion’s setup guide lists an active Sirion CLM platform subscription as a prerequisite. Gavel Exec works on its own, in Word or in the browser.

Does Sirion work in Word for Mac and Word on the web?

Yes. Sirion’s Microsoft marketplace listing says Sirion for Word works across Windows, macOS, and desktop and browser versions of Word. Gavel Exec also runs in Word for Windows, Mac and the web, plus its own browser app.

How much does Sirion cost vs. Gavel Exec?

Gavel Exec costs $160 per user per month, or $1,740 per user per year, with 1,000 queries per user per month, after 25 free queries per user with no credit card. Teams of 10 or more seats get team pricing.

Sirion’s pricing is not published; it’s quote-based. Its site routes buyers to a demo, and its demo FAQ lists pricing discussions among the next steps. Plan for setup too: Sirion’s Word add-in guide lists an established clause library, defined playbooks and approval workflows as organizational prerequisites.

Does Sirion publish its pricing?

No. Sirion’s pricing is not published and is quote-based. Gavel Exec publishes its per-seat price on its pricing page.

Does Sirion offer a free trial?

Sirion doesn’t list a free trial; it offers guided demos, and its demo FAQ suggests asking about a proof of concept when you need hands-on validation. Gavel Exec starts with 25 free queries per user and no credit card.

Security and data use: Sirion vs. Gavel Exec

Sirion’s Trust Center lists ISO 27001:2022 certification and SOC 1 Type II and SOC 2 Type II reports, the SOC 2 report covering Security, Availability and Confidentiality. Sirion encrypts data in transit with TLS 1.2 or higher and at rest with AES-256, enforces multi-factor authentication, supports SAML 2.0 single sign-on and runs an AI governance program for the EU AI Act.

Gavel Exec is SOC 2 Type II certified and has Zero Data Retention agreements with the AI model providers it uses, including OpenAI. Gavel hosts customer data on AWS in the United States by default, offers European Union, Canada and Australia hosting, and gives each customer an isolated database. Gavel security

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.

Does Sirion train its AI on customer contracts?

Sirion’s external AI Policy says, “We do not use customer data for training the AI models.” Its Trust Center pages on compliance, security and AI governance don’t repeat that statement, and its platform page says you can fine-tune Sirion’s agents with your company’s content, policies and risk appetite. Confirm the current data-use terms with Sirion during procurement.

Who makes Sirion and Gavel Exec?

Sirion was founded by Ajay Agrawal, its CEO, and lists its North American office in Lehi, Utah. It says it was named a Leader in the 2025 Gartner Magic Quadrant for Contract Life Cycle Management for the fourth consecutive year. Gavel is part of Relativity, which also offers e-discovery software. Dorna Moini, Gavel’s CEO and Founder, practiced litigation at Sidley Austin, and over 2,000 legal organizations in 28 countries use Gavel.

Who owns Sirion?

Haveli Investments, an Austin-based technology investment firm, holds a majority stake. Sirion completed the majority investment on February 23, 2026, after announcing it on January 8, 2026.

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Method: Gavel editorial review. Checked against Sirion’s and Gavel’s public pages on November 14, 2026. Gavel publishes this comparison and sells Exec. No hands-on comparative test of the two products was conducted.