Kosmos review
A broad, free core for firms prepared to self-host legal operations.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Kosmos is a web-based, open-source legal practice management application for law firms that want to centralize matter and contact management, deadlines, tasks, time entries, expenses, invoicing, trust accounting, and client intake. Its free-to-run model and self-hosted deployment make it particularly relevant to firms seeking control over their practice-management environment without a paid software tier as the starting point. The application is released under the AGPL-3.0 license and uses Django with PostgreSQL.
Its broadest strength is the combination of financial, operational, and case-building workflows. Firms can track billable time, expenses, flat fees, and invoices; accept online payments through Confido or LawPay; and manage trust accounting. Intake workflows feed matters, while documents can be processed with OCR and searched across full text. Case timelines, citations, witnesses, notes, and labels add structure for firms handling matters that require more than basic contact and calendar management. Google Calendar, Google Contacts, Google Drive, CourtListener, Claude, and Gemini extend its connection to calendars, files, legal research, and AI services.
Kosmos is a strong fit for firms willing to run and maintain a self-hosted system and wanting free core accounting alongside matter management and document search. Its optional per-matter AI chat and legal analysis can support focused case work without defining the entire product. Firms that prioritize a managed deployment, official mobile applications, or a client-facing portal should consider whether Kosmos matches those operating preferences before choosing it. The product is less suited to buyers seeking a narrowly packaged, turnkey cloud service with every client-access and mobile workflow already central to the offering.
Kosmos pros and cons
- Where it wins
- Free, open-source core covering matters, billing, and trust accounting
- OCR, full-text search, timelines, citations, and case-building tools
- Per-matter AI chat and analysis with several legal workflow integrations
- Where it doesn't
- Self-hosting requires the firm to manage its deployment
- AI analysis is optional and scoped to individual matters
- Client portal and official mobile apps are not part of the described feature set
Kosmos fact sheet, pricing and score →
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