Zero Self-Hosted AI Email App

Zero is an open-source AI email solution that lets you self-host your own email client while integrating external services like Gmail and Outlook. It modernizes email with built-in AI agents for drafting replies, summarizing threads, and automating workflows, all under a data-privacy-first model—Zero never tracks, collects, or sells your data. Licensed under MIT (Apache-style permissiveness), the project welcomes commercial and community contributions, ensuring transparency and extensibility.

How to Use

1. Clone the repository:
   git clone https://github.com/Mail-0/Zero.git && cd Zero .

2. Install dependencies via Bun (v1.2+ required) or npm:
   bun install or npm install .

3. Start PostgreSQL and Redis locally using Docker (v20+ required):
   bun docker:up .

4. Copy and configure environment variables:
   cp .env.example .env then edit BETTER_AUTH_SECRET, GOOGLE_CLIENT_ID/SECRET, DATABASE_URL, REDIS_URL, REDIS_TOKEN .

5. Run database migrations:
   bun db:push && bun db:migrate .

6. Launch the app:
   bun dev → http://localhost:3000 .

Features

• Unified Inbox: Connect multiple providers (Gmail, Outlook, etc.) into one interface.

• AI Agents: Compose replies, summarize long threads, extract action items, and triage emails via LLMs in-app.

• Self-Hosting Freedom: Run Zero on your own infrastructure, with full control over data and uptime.

• Privacy-First Design: Zero does not track or sell data; encryption and access remain under your control.

• Customizable UI: TailwindCSS and Shadcn UI make it easy to theme and extend client-side features.

• Developer-Friendly: Built with Next.js, React, TypeScript on the front end; Node.js, Drizzle ORM, PostgreSQL on the back end.

Suitable Scenarios

• Enterprise Self-Hosting: Deploy Zero in private clouds or on-prem servers to meet strict compliance and privacy requirements.

• Personal Data Control: Manage personal and work emails locally without relying on third-party servers.

• AI-Enhanced Productivity: Use built-in summarization and drafting tools to handle high-volume inboxes.

• Developer Integrations: Extend via API hooks, custom plugins, or integrate into CI/CD pipelines for automated email testing.

• Rapid Prototyping: Spin up a local email client for demos, user testing, or internal tools in minutes.