Arceus Legal, an AI-powered law firm focused initially on commercial contract work, has secured $17 million in funding to broaden its legal offerings. The firm uses proprietary AI and licensed attorneys to deliver transparent flat-fee services with faster turnaround times than traditional law firms.
- Flat-fee pricing with capped review times reduces client cost uncertainties
- In-house AI-powered platform CounselOS streamlines case management
- Fundraising led by Greycroft LP to support expanded service offerings
What happened
Arceus Legal announced it has raised $17 million in a new funding round led by Greycroft LP, with participation from Craft Ventures Management, South Park Commons Management, and others. The AI-driven law firm, which started by offering commercial contract reviews on a flat-fee basis, plans to use the capital to broaden its service scope beyond contracts.
The firm combines licensed attorneys with proprietary AI tools, delivering contract reviews typically within three to five hours and offering a money-back guarantee if the process exceeds eight hours. Its CounselOS platform integrates client data from applications like Salesforce and Gmail to personalize legal services and provide real-time updates through Slack and email.
Why it matters
Traditional law firms often bill clients by the hour and can take days or weeks to complete contract reviews, creating inefficiencies and unpredictable costs for fast-growing companies. Arceus Legal’s AI-enabled approach aims to reduce turnaround times and remove billing uncertainties by quoting prices upfront and automating routine tasks.
By embedding AI into the legal workflow and maintaining attorney oversight on every matter, Arceus addresses common pain points such as missed deadlines and unexpectedly high bills that founder Mac Liu experienced firsthand. This model challenges the established billable-hour system and could reshape how legal services are delivered to startups and high-growth businesses.
What to watch next
Following a recent quadrupling of its customer base, Arceus is actively recruiting attorneys, AI experts, and engineers to support expansion into areas like employment law and privacy compliance. The firm’s ability to successfully broaden beyond commercial contracts will be a key indicator of its long-term potential.
Industry observers should also monitor competitiveness, as most legal AI innovation currently focuses on software tools for traditional firms rather than rebuilding law firm operations. Arceus’s approach to integrating AI with legal practice management could set a precedent for new legal service models targeting emerging companies.