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Arceus Launches AI-Powered Law Firm, Combines AI Agents With Licensed Attorneys to Disrupt Contract Work

October 1, 2026 at 14:36 EDT

AI Agents
Funding & M&A
Sales & Business

Arceus, a startup led by entrepreneur Mac Liu, has launched a new law firm model that pairs AI agents with licensed attorneys to handle commercial contract work for startups and scale-ups at flat-fee prices, raising $17 million in Series A funding. The firm uses a proprietary operating system called CounselOS that ingests client context from integrated business tools and past agreements, enabling AI agents to propose contract revisions before licensed attorneys review and finalize the work.

October 1, 2026 · Arceus Legal

AI Law Firm Arceus Disrupts Contract Work With Flat Fees

Proprietary AI agents paired with licensed attorneys handle commercial contracts at transparent, fixed prices. The startup raised $17 million and has already processed over 12,000 agreements.

Series A Funding

$17M

Contracts Reviewed

12,000+

Turnaround Guarantee

8 Hours

Customer Growth (Sept)

4×

Service Coverage & Pricing

Contract Types

• Master Service Agreements

• Nondisclosure Agreements

• Data Processing Agreements

• Vendor Agreements

• Order Forms

Fixed Fee Pricing

• NDA Review: $250

• Standard (3-25 pp): $500

• Complex Work: $1,000+

• Median turnaround: 3–6 hrs

• Free if over 8 hours

The Model

Client submits contract via Slack → AI agent ingests context from Salesforce, HubSpot, Gmail, and past agreements → Proprietary CounselOS system proposes revisions → Licensed attorney reviews and approves → Client receives final work in Slack with live updates.

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