What is MikeOSS?

Mike is an open-source legal AI platform positioned as a free alternative to Harvey and Legora. It provides an AI assistant that reads legal documents with grounded citations, matter-scoped projects, tabular review across hundreds of documents, and reusable workflows. Teams can self-host it so documents stay within their own perimeter, choose their own models, and extend the codebase.

How to use MikeOSS?

Sign up or log in on the website, or self-host the open-source application using your own Supabase database and S3-compatible storage. Create a project (matter workspace), upload documents such as credit agreements, SPAs, leases, and NDAs, then chat with the assistant, run tabular reviews, or apply saved workflows. Configure supported models (Anthropic, Gemini, OpenAI, or OpenRouter-backed) and pay only for the API costs you incur.

Core features of MikeOSS

Assistant: chat with uploaded legal documents and get answers grounded with citations
Projects: matter-scoped workspaces that keep full context across documents and conversations
Tabular Review: spreadsheet-style extraction across hundreds of documents in parallel, with every cell cited to a page and quote
Workflows: save proven prompts as reusable, firm-wide templates runnable in one click
Document handling: upload PDFs and office documents, convert DOC/DOCX, manage files in S3-compatible storage
Model choice: run the assistant with supported Anthropic, Gemini, OpenAI, or OpenRouter-backed models
Self-hostable and open source: inspect, fork, and extend the codebase with no vendor lock-in
Legal research: CourtListener integration for case law research