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stella/stella

Open source legal workspace

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stella

Legal workspace: free to use, open to inspect, yours to keep.

Website · Manifesto · Issues · Contributing · Discord

Latest release License stella cloud Issues Discord

stella's case-law reader open on a Czech Supreme Court judgment, 27 Cdo 59/2022, on a company director's statutory guarantee to creditors. The decision's numbered paragraphs fill the centre with a reader's highlight and underline; the margin shows an AI note on the issue and a lawyer's comment; the two-turn chat on the right answers whether a creditor must first make the company demand compensation from its director, citing the decision.
Case law from public sources: read the decision, mark it up, and ask questions answered from its own paragraphs.

stella is an open-source legal workspace and data stack for legal teams, currently in beta.

Data infrastructure

Case law and public legal sources. Legal Atlas holds the corpus runner registry, corpus document kinds, and per-jurisdiction provision-citation grammars.

Business registries. Business Registries provides typed clients for national company and commercial registries, including ARES, Companies House, SEC EDGAR, KRS, PRH, VIES and more.

Anonymization. stella/anonymize provides WASM-backed anonymization tooling for legal AI workflows, with app integration through chat and document review.

Legal intelligence

Tabular Review. Extract structured answers from document sets into matter-scoped review tables for due diligence, discovery and research.

AI agent. Chat with matters, files, registries and connected tools, with approvals and source previews.

Skills and external connectors. Reusable prompts, tool definitions and MCP-compatible tools that extend the agent.

Workspace

Web app. Matters, documents, Word .docx editing, review, research, chat and knowledge tools in one workspace.

Desktop app. Opens Office documents from stella in your local apps and saves edits back, and keeps a clipboard history that stays on your device.

stella MCP server. A central gateway to access and control stella data, including matters, documents and case law.

Outlook add-in. Coming soon.

A tour

Every screenshot below is stella itself, captured by its own end-to-end suite from a seeded demo organization and kept current by CI (how). The matters, parties and people in them are fictional.

A chat thread where the user asks to turn a change-of-control review into a view for a partner meeting. The answer cites the two critical agreements as document chips, then renders a generated view: total contract value needing consent or termination review, consent to confirm, and notice only, a bar splitting the value between them, and a table of counterparties with agreement, document count, value, risk and change-of-control position

AI agent. Cited answers across a whole matter, turned into a view you can take to the meeting.
The Files tab of the Meridian supply agreement matter: a list of PDF, Word and email files with author, last updated, version, status (Active, In Review, Closed, On Hold) and notes columns

Matters. Documents, emails and versions per matter, with status, notes and owners.

 The Table tab of the Export Review matter: one row per document with coloured status pills, notes, due dates and an extracted document type such as Shareholder Register, Supplier Agreement or Loan Agreement

Tabular Review. Extract structured answers from a document set into a review table.
A supplier agreement open in the Word editor, with the inspector on the right showing metadata, version history, review and anonymization tabs, the current version v2 and the matter status In Review

Editor. Edit .docx in the browser, with version history and matter context beside the page.

 The Templates library listing nine agreements, such as Supply Agreement, Non-Disclosure Agreement and Share Purchase Agreement, grouped into Corporate, Employment, Commercial and Real Estate categories

Templates. A shared library of firm templates, grouped by practice area.

Quickstart

stella cloud

Hosted stella preview is available at my.stll.app.

Self-hosting

Deploy on Railway

Deploy the full stack (web, API, Postgres, Redis, Gotenberg, file storage) to Railway in one click; no email provider or AI key is needed for the first login.

Run stella on your own infrastructure: see the self-hosting guide. The self-host Compose file runs the API, document-processing worker, and Gotenberg; the guide covers Postgres, RustFS object storage, Gotenberg, and the supported Redis-compatible services. The frontend is a TanStack Start SSR app: build and run apps/web/Dockerfile, or run bun --filter @stll/web build followed by HOST=0.0.0.0 PORT=3002 bun apps/web/dist/runtime.js. Railway-specific service configuration is documented in docs/railway.md.

Prerequisites

  • Bun
  • Git
  • Docker Desktop or Docker Engine

Run stella locally

git clone https://github.com/stella/stella.git
cd stella
bun run dev

This installs dependencies, prepares local env files, starts Docker services, pushes the database schema, starts the API at http://localhost:3001, starts the web app at http://localhost:3000, and opens the browser.

Cloud environments

Cloud environments run bash .agents/cloud-setup.sh install once, then bash .agents/cloud-setup.sh start each session. Startup restores local PostgreSQL and Valkey and writes apps/api/.env.test, which the API test runners load. Apply migrations next with (cd apps/api && DB_LOAD_GATE_EBS_SIGNAL=disabled bun --env-file=.env.test run db:migrate); the explicit signal setting applies to this disposable local database. Startup does not run migrations. Setup installs dependencies without lifecycle scripts, so generated route and API types are absent until a task needs them; run bun run generate first in that case. Cloud tasks do not need the .ai/shared or template-pack submodules.

Optional demo data

NODE_ENV=development STELLA_LOCAL_DEV=1 bun --filter @stll/api db:seed-test-user
NODE_ENV=development STELLA_LOCAL_DEV=1 bun --filter @stll/api db:seed-dev

Common commands

# Run only the web app, reusing an existing API
bun run dev:web

# Run only the API and local infrastructure
bun run dev:api

# Run without opening a browser
bun run dev --no-browser

# Skip setup steps when iterating
bun run dev --skip-install
bun run dev --skip-db-push

# Use shifted ports for parallel worktrees
bun run dev --dev-instance feature-a

Local development uses mock AI by default. To use real AI, set provider keys in apps/api/.env and set USE_MOCK_AI="false".

Responsible use

stella does not aim to replace human judgment or provide legal advice. stella relies on AI models, which can produce incorrect or misleading output. We aim to ground AI flows in citations and traceable source material, but we encourage users to always validate the answers. AI summaries, notes and analyses of court decisions are generated by stella, not endorsed by the courts, and do not represent the courts' own reasoning; they are aids for legal professionals, and the decision text remains the authoritative source.

Contributing

We welcome contributions. You can help not only by writing code, but also, e.g., by providing feedback, or translating. Please read CONTRIBUTING.md for more information and our policy on AI-generated contributions.

PRs must pass the linting and testing pipeline. You will be prompted to sign the Contributor License Agreement (CLA) by CI.

Contact

  1. Open an issue for questions, feedback or suggestions.
  2. Reach out to us for general queries at hello@stll.app.
  3. security@stll.app for security issues (see Security Policy).

Licensing

Licensed under the Apache License 2.0. See LICENSE for the full license text and NOTICE for attribution of bundled third-party code.

Development