Arceus Raises $17M in Funding

Arceus, a San Francisco-based law firm that utilizes AI agents and proprietary software to provide legal services for fast-growing companies, has announced it raised $17 million in funding. The company, which combines licensed attorneys with its proprietary operating system, CounselOS, delivers commercial legal services like contract review and negotiation at a flat price with guaranteed turnaround times.

Investors

The funding round was led by Greycroft, with participation from Craft Ventures, South Park Commons, and other investors.

Arceus Use of Funds

The capital will be used to support the hiring of attorneys, engineers, and AI researchers at the company's San Francisco headquarters and to fund expansion into additional areas of legal work.

About Arceus

Founded in 2026, Arceus is a company building a new model for how fast-growing companies access legal services. The firm combines licensed attorneys with AI agents and its proprietary CounselOS software to provide faster, more efficient legal support while retaining business context, legal preferences, and institutional knowledge across matters.

Funding Details

Company Website: https://arceus.legal

Company: Arceus
Raised: $17M
Funding Date: October 2026
Lead Investor: Greycroft
Additional Investors: Craft Ventures, South Park Commons
Company Website: https://arceus.legal
Software Category: Legal Tech