Open Source Legal AI Platform Mike Challenges Commercial Pricing Model
Will Chen, a former Latham & Watkins lawyer, launched Mike, an open source legal AI platform that performs core functions comparable to Harvey and Legora. The platform generated over 1,000 GitHub stars and 300 forks within 72 hours of launch-the highest adoption rate for any legal tech project on record.
Mike handles document review, creation, editing, project management, tabular review, and workflow automation. Chen said the platform outperforms competitors in some areas: it renders documents like checklists in landscape mode, makes precise tracked changes to existing documents, and can replicate and edit documents across multiple files simultaneously.
Security Through Local Deployment
The key difference lies in deployment. While the demo version runs on mikeoss.com, Chen designed Mike for firms to install locally or on their own intranets. This means files never leave a firm's computers or databases.
"Law firms take security very seriously," Chen said. Some firms have resisted uploading confidential documents to Harvey's Vault or using its direct agent features. With Mike, firms own the software entirely and avoid third-party vendor risk.
Early adopters have reported success. Lawyers have spun up local versions and posted positive feedback on LinkedIn and X about performance and security.
The Pricing Question
Chen built Mike to challenge how legal AI is priced and distributed. "Open source tools are very commonly adopted, securely and safely, in the software industry," he said. "The legal industry can follow."
The platform targets small and medium-sized firms priced out by Harvey and Legora. Large firms have budgets for commercial solutions. Smaller practices do not.
Mike is free beyond language model and token costs. Chen has no plans to commercialize it. "My immediate goal was just to start a conversation," he said. "I also enjoy the process of building."
Readiness for Real Work
For small and medium firms, Mike functions end-to-end for core legal workflows. Chen acknowledged more work is needed to scale the platform for large firms and enterprises.
Firms using Mike retain full control. They can modify the code and keep changes private if using it internally. If they allow third parties remote access-such as through a client portal-they must share source code under the AGPL v3 license. Chen is considering more permissive licenses.
Broader Market Shifts
The legal tech field is changing rapidly. Claude for Word, Microsoft's Legal Agent, and a growing number of independently built tools are entering the market.
Chen predicted a split emerging. "Thin wrappers that do not provide sufficient value are under the threat of being replaced by equivalent services from MS, Anthropic, OpenAI etc who have an immense distribution advantage," he said. "Thick wrappers with a unique value proposition and high firm-wide utilisation will survive."
On collaboration between commercial vendors and independent developers, Chen saw potential. "Legal vibe-coders play an important role as lawyers know best what product features they want," he said. The question is whether creative developers can organize effectively outside formal corporate structures.
Learn more about AI for Legal and Generative AI and LLM tools shaping the profession.
Your membership also unlocks:
