Arceus raises $17M to transform legal work with AI

Liu: Mac Liu is the founder and CEO of Arceus, a serial entrepreneur who previously held tech roles at companies including Robinhood and Anduril and founded Vultron, which was sold earlier in 2026. He launched Arceus after repeated negative experiences with traditional law firms to create a faster, more client-focused alternative using AI and software. Arceus: Arceus is an AI-driven law firm that combines software and licensed attorneys to handle commercial contract work including review, drafting, redlining, and negotiation for agreements such as NDAs, MSAs, DPAs, and vendor contracts. It integrates AI to gather context and accelerate repetitive tasks while attorneys retain final responsibility, and offers Slack-based submissions along with flat-fee pricing for greater client predictability. The firm launched to address common frustrations with traditional legal services and recently secured funding led by Greycroft. Greycroft: Greycroft is a venture capital firm that invests in early-stage technology companies. It led the funding round for Arceus, viewing the startup as an opportunity to rebuild the law firm model itself with AI rather than simply selling tools to existing firms. Craft Ventures: Craft Ventures is a venture capital firm focused on software and technology investments. It participated in the recent funding round for Arceus alongside other investors. South Park Commons: South Park Commons is a community and investment platform supporting technologists and founders building ambitious projects. It participated in the funding round for Arceus as part of its ongoing support for innovative startups. AI Adoption: Generative AI has rapidly become a standard tool in corporate legal departments, with surveys showing sharp increases in deployment and confidence for tasks like document review over the past year. Market Shift: Legal departments are evolving toward multidisciplinary teams and broader services such as technology implementation and managed services, with non-lawyer specialists playing larger roles alongside AI tools. Investment Thesis: Investors are prioritizing AI-native law firm models that rebuild workflows end-to-end over incremental software tools sold to traditional firms.