SSirion AgentOS

Sirion’s Invoice Agent checks supplier invoices against the contract terms that should govern them and flags mismatches. It is one of eight named agents in Sirion’s contract lifecycle platform, which manages more than 7 million contracts worth nearly $800 billion for enterprises including Vodafone, IBM and Morgan Stanley. Since October 2025, a conversational layer called AskSirion takes plain-English requests and orchestrates the agents on Sirion’s agentOS.

Sirion is best for large enterprises with heavy contract volumes across legal, procurement and sales, especially those that care about what happens after signature. Points to plan for are quote-only pricing, an enterprise implementation and performance figures that come from Sirion and its early adopters. We rate it 7.6/10 on our scale. We have not used Sirion; this review is based on Sirion’s launch release, platform page and press materials, plus coverage by Artificial Lawyer.

Seven Million Contracts and a Stack of Analyst Rankings

Sirion pairs its agent launch with large scale figures and a long list of analyst rankings.

For a buyer, the analyst record is the main reassurance. Four years as a Gartner Magic Quadrant Leader and a 4.9 peer rating, as reported by Sirion, point to a platform that large enterprises have run in production for years, not a new agent startup.

The performance numbers are best read alongside your own pilot. Artificial Lawyer, which covered the launch, relayed Sirion’s 80% to 90% figure rather than testing it independently. The figures are plausible for focused tasks like first drafts, but a pilot on your own contracts is the only way to know.

The ownership change is the third point to weigh. Haveli Investments, a technology-focused firm in Austin, took a majority stake in early 2026. Private equity ownership often brings a push for growth and efficiency; for customers that can mean faster product investment or tighter pricing, so it is worth asking Sirion directly about roadmap commitments and renewal terms.

Conversational Contracting That Calls the Right Agent

Sirion describes AskSirion as a 360 conversational contracting experience. A user types what they need, AskSirion interprets the request, calls the right agents and returns the result with a plain-language explanation. CEO Ajay Agrawal told Artificial Lawyer the agents act autonomously when they can and collaboratively when they should.

agentOS

agentOS is the layer that governs how agents think, act and collaborate. It combines more than 10 large language models with more than 1,200 proprietary small language models and picks the best one for each task. Agents can be fine-tuned on a company’s content, policies and risk appetite, and enterprises can build their own agents on agentOS without traditional development cycles. Sirion says its agents are trained by attorneys and subject matter experts and grounded in a contract knowledge graph built from more than a decade of structured contract data.

Before Signature

• Search Agent: answers questions about a single contract or the whole repository, with links to the source.
• Draft Agent: produces negotiation-ready drafts from enterprise data, templates and playbooks.
• Playbook Agent: turns policies and institutional knowledge into standard playbooks and templates.
• Issue Detection Agent: reads the full contract context and flags clause-level deviations.
• Redline Agent: revises deviating clauses and explains each change.

In negotiations, AskSirion works inside Microsoft Word to give counterparty insights and recommendations.

After Signature

• Extraction Agent: converts documents into structured contract data that populates other systems.
• Obligations Agent: tracks commitments and flags those that are missed or at risk.
• Invoice Agent: reconciles invoices against contract terms and detects mismatches.

Who Uses Which Agent

The agents map to different teams. Lawyers and contract managers use the Draft, Issue Detection, Redline and Playbook Agents during negotiation, often inside Word. Legal operations relies on the Extraction Agent to keep the repository structured and on the Search Agent to answer questions without manual digging. Procurement and finance get the most from the Obligations and Invoice Agents, which connect what a supplier promised with what it delivers and bills. Because AskSirion sits in front of all of them, a user does not need to know which agent to call; the request decides.

This is also where Sirion differs from review-first tools. Contract value can leak after signature through missed obligations, unnoticed renewals and invoices that drift from agreed rates. Sirion’s agent lineup is weighted toward catching those problems, so procurement and finance leaders have as much reason to evaluate it as general counsel.

Loading Old Contracts and Setting Up Playbooks

Sirion is sold through a demo and enterprise agreement. A typical path starts with loading existing contracts so the Extraction Agent can structure them, then configuring playbooks with the Playbook Agent, then enabling negotiation agents for one contract type, such as supplier agreements. Post-signature agents follow once obligations and invoice data are connected. Custom agents on agentOS come later, once the standard agents are in use.

Lawyers Approve Redlines, Finance Acts on Flags

Lawyers approve redlines and drafts and own the playbooks. Procurement and finance teams decide what to do about flagged obligations and invoice mismatches. Kanti Prabha, Sirion’s co-founder and president, frames the AI as amplifying human expertise, and the explanations attached to agent actions are there so people can check the reasoning.

Enterprise Contracts Priced by Quote

Sirion sells by enterprise contract and does not publish prices.

Weighing Sirion Against Its Own Invoice and Obligation Claims

Without published prices, the way to judge cost is against Sirion’s own claims and your contract volume. These are illustrative framings, not quotes.

• A procurement-led deployment: if the Invoice Agent catches billing that does not match contract terms, the savings can be counted directly. Ask Sirion for the recovery rates its customers see and compare them with the subscription.
• A legal-led deployment: Sirion cites WorldCC research that enterprise contracts take 24 to 30 weeks. If the reported near-50% cycle-time cut held, a 26-week contract would close in about 13 weeks. Measure your own baseline before the pilot.
• A replacement for an existing CLM: budget for migration of legacy contracts and integrations, because agents only see what is in the platform.

The common thread is that Sirion’s value scales with contract volume and with how much post-signature data is connected. A company that loads only active supplier contracts but never connects invoices will get only part of the value. Ask about implementation services, the cost of custom agents, user or contract-volume pricing and any usage-based AI charges before signing.

Sirion AgentOS Compared With Ironclad AI Agents, LegalOn, Luminance and Spellbook

Enterprise contract AI divides into full CLM platforms with agents and review-first tools. Sirion and Ironclad are platforms; LegalOn, Luminance and Spellbook focus on review and drafting.

Sirion is the pick when the contract problem extends past signature, into obligations, supplier performance and invoices. Ironclad is its closest rival among CLMs, with a stronger story on intake and renewals. LegalOn, Luminance and Spellbook are lighter choices for teams whose pain is review speed. A common enterprise pattern is a CLM like Sirion as the system of record, with lawyers free to use a drafting tool in Word for complex negotiations; AskSirion’s Word integration reduces the need for a second tool, but check how well it fits your lawyers’ habits during the pilot. See our legal agents and enterprise agents guides.

Global Enterprises and Procurement-Led Teams

• Global enterprises with large portfolios: Sirion’s scale figures and multilingual coverage fit companies with contracts in many countries.
• Procurement and finance teams: the Obligations and Invoice Agents tie contract terms to supplier performance and billing.
• Companies on SAP Ariba: the platform page lists Ariba as an integration.
• Organizations with unusual workflows: agentOS lets them build custom agents.
• Sales and commercial teams with many customer contracts: the Search Agent and AskSirion let non-lawyers ask what a contract says without waiting on legal, with answers linked to the source clause.

Mid-Size Legal Teams and Price-First Buyers

• Small and mid-size legal teams: an enterprise CLM implementation may be more than modest volumes need.
• Buyers who need a price before a demo: Sirion shares pricing after a demo.
• Teams that only need faster review: LegalOn or Spellbook start faster.
• Law firms: Sirion is built for corporate contracting, not client matters or litigation.

Reported Gains and Connectors to Confirm With Sirion

• Company-reported results: the 50% and 80% to 90% improvements come from Sirion and early adopters.
• Integration scope: confirm connectors for your CRM, ERP and procurement tools; the platform page names Word and SAP Ariba.
• Implementation effort: agents rely on contracts and data in the platform, so migration and data cleanup come first.
• Explanations still need reading: each agent action comes with a plain-language explanation and source links, which only helps if reviewers actually check them before approving.
• Custom agent maintenance: agents built on agentOS need owners and testing as policies change.
• Ownership change: Haveli Investments took a majority stake in early 2026; ask about the product roadmap and support commitments.

The Agentic CLM Launch and Haveli’s Majority Stake

• October 9, 2025: Sirion unveiled its next-generation agentic CLM platform, and Artificial Lawyer covered the AskSirion launch.
• January to February 2026: Haveli Investments announced and completed a majority investment in Sirion.
• April 30, 2026: Sirion was named a Customers’ Choice in Gartner’s 2026 Voice of the Customer for CLM.

Reaching Further Past Signature Than Most CLM Rivals

For large enterprises that want one platform to handle contracts from first draft through invoice, Sirion is one of the strongest options. Its agents reach further into post-signature work than most rivals, AskSirion gives non-lawyers a plain-English way in and its analyst record suggests a mature platform underneath.

It scores 7.6/10 on our scale, a score that mainly reflects quote-only pricing and a sizable implementation, which our rubric weighs for every buyer. For the enterprises it targets, those costs are normal. The Invoice and Obligations Agents are the features to test hardest, because they are where Sirion differs most from rivals and where savings can be measured in money rather than hours. A pilot that runs a quarter’s supplier invoices through the Invoice Agent, and compares flagged mismatches with what finance found manually, would show quickly whether the platform pays its way. Shortlist it next to Ironclad AI Agents and ask for a pilot that measures cycle time and invoice recovery on your own data.

Contract Managers’ Short List of Sirion Questions

What Is Sirion AgentOS?

agentOS is Sirion’s AI operating system for building, orchestrating and governing agents. Every Sirion agent runs on it, and enterprises can build their own agents there. AskSirion is the conversational interface on top.

How Much Does Sirion Cost?

Sirion does not publish prices. Buyers request a demo and sign an enterprise contract, so ask about implementation, custom agents and any usage-based charges.

Can Sirion Check Invoices Against Contracts?

Yes. The Invoice Agent reconciles invoices against contract terms and detects mismatches, and the Obligations Agent tracks commitments and flags missed or at-risk ones.

Does Sirion Work in Microsoft Word?

Yes. AskSirion integrates with Microsoft Word to give counterparty insights and recommendations during negotiations.

Is Sirion Better Than Ironclad?

They suit slightly different priorities. Sirion goes deeper into obligations and invoice reconciliation and offers custom agents on agentOS. Ironclad has agents for intake, contract families and renewals and a Jurist assistant for review and research. Both are quote-only enterprise platforms, so compare them in a pilot.