Kosmos is free, web-based law practice management software for small law firms. It covers matters, contacts, calendars, tasks, time and expense tracking, invoicing, trust accounting, reports, client intakes and search. The case builder supports document OCR, full-text search, highlights, fact timelines, witnesses and notes, with optional AI chat using matter documents, notes, case law and prior conversations. Firms can handle hourly or flat-fee matters, email invoices with online payment links and collect payments through LawPay/AffiniPay or Stripe. Google Workspace integration can sync Calendar and Contacts, map Gmail labels to matters and map Drive folders to document categories. Kosmos is AGPL-licensed and can run on a firm’s own server. Installation documentation covers Ubuntu or Debian, sudo access and a local PostgreSQL database; the automated check runs on Ubuntu 24.04. Files can remain on local disk or use an S3-compatible object store. Optional Claude and Gemini support, JSON APIs and an MCP server are documented.
Who it is for
Kosmos suits small law firms seeking free, self-hosted practice management with case building, billing and trust accounting. It also fits teams wanting optional AI, Google Workspace connections or documented APIs.
What is good
- Free AGPL software
- Supports self-hosting on a firm server
- Includes trust accounting and invoicing
- Offers OCR and full-text document search
- AI features are optional
What to know first
- Installation requires Ubuntu or Debian
- Local PostgreSQL and sudo access are required
- Uploads over 100 MB are rejected
- AI provider configuration is separate
Verdict
Kosmos provides a broad legal practice feature set with self-hosting and optional AI. Firms should account for its server requirements and 100 MB upload limit when planning deployment.
Compared on legal practice management software
- Free plan
- Yes
- Client intake
- Yes
- Time tracking
- Yes
- Billing and payments
- Yes
- Trust accounting
- Yes
