MikeOSS
Open-source legal AI platformSelf-hosted legal AI with zero licence cost
Highlights
What you can do with it
- Apply a conditions precedent checklist workflow to a credit agreement
- Compare confidentiality definitions across many NDAs in one table
- Run review workflows on leases, equity purchase agreements and credit agreements
- Research case law through CourtListener and draft a research memo
How to use it
- 1 Register for the free cloud version or clone the GitHub repository
- 2 If self-hosting, configure the environment, model API keys, storage and security
- 3 Create a matter workspace and upload the documents
- 4 Ask questions in chat or run table review over a batch of documents
- 5 Use preset workflows or save your own validated prompts as templates
- 6 Fork and extend the code, connect your document system and choose your models
Who it is for
Pros
- No licence fees and no vendor lock-in, since the code is open
- Self-hosting keeps privileged documents inside your own perimeter
- Cell-level citations make parallel review auditable
- Model choice stays with you, and you pay only API costs
Limitations
- You pay model API costs, and those scale with volume
- Self-hosting means you own deployment, security and maintenance work
- Open-source legal software is early stage, so expect rough edges and to verify every output
What MikeOSS is
MikeOSS, also called Mike, is an open-source legal AI platform positioned as an alternative to products such as Harvey and Legora. The argument it makes is control: the code is open, the licence cost is zero, there is no per-seat pricing, and it can be self-hosted so documents never leave the firm's own perimeter. Functionally it covers chat and document question answering with citations, matter and project workspaces, spreadsheet-style parallel review across hundreds or thousands of documents, reusable workflows and template-based drafting. Version 0.3.0 adds CourtListener integration for legal research. The cloud version is free to register for, and you bring your own model API keys and pay only for API usage.
What you can do with it
- Ask questions about uploaded documents and get answers with citations
- Review hundreds of documents in parallel in a spreadsheet layout, with cell-level citations
- Run preset workflows such as conditions precedent checklists and change-of-control reviews
- Draft documents from templates and reuse validated prompts as firm-level workflows
- Research case law through CourtListener and draft a research memo
- Fork the code, connect your document management system and audit prompt and data flows
Who it is for
- Law firms and deal or litigation teams working through large document sets
- Corporate legal and compliance teams with strict data residency and privilege requirements
- IT and knowledge management teams that want to deploy and integrate internally
- Cost-sensitive small and mid-sized firms avoiding expensive per-seat subscriptions
What to watch out for
Zero licence cost does not mean zero cost: you pay model API usage, and that scales with the volume of documents and queries. Self-hosting also means you own deployment, security, updates and uptime, which is real work for a firm without an IT function. And this is early-stage open-source legal software, so expect rough edges and treat every output as a draft that a qualified lawyer must verify before it touches a client or a filing.
FAQ
Is MikeOSS free?
The software is open source with zero licensing cost, and the cloud version is free to register for. You pay your own model API costs.
Can I self-host it?
Yes. It is designed to be self-hostable so documents never leave the firm's perimeter, with compliance and privilege control staying in-house.
What is table review?
It extracts information from hundreds or thousands of documents in a spreadsheet style, with every cell traceable to a specific page and quotation.
Which models does it support?
It supports OpenAI models and others; you choose the models and pay only for the API usage.
Why it is free
What the official page says： 免费
Free limits, trial length and features are decided by the official site and can change at any time.
Product preview
Screenshot archived from the listing page, for preview only.
