Zero

An Open-Source Gmail Alternative for the Future of Email

What is Zero?

Zero is an open-source AI email solution that gives users the power to self-host their own email app while also integrating external services like Gmail and other email providers. Our goal is to modernize and improve emails through AI agents to truly modernize emails.

Why Zero?

Most email services today are either closed-source, data-hungry, or too complex to self-host.
0.email is different:

• ✅ Open-Source – No hidden agendas, fully transparent.
• 🦾 AI Driven - Enhance your emails with Agents & LLMs.
• 🔒 Data Privacy First – Your emails, your data. Zero does not track, collect, or sell your data in any way. Please note: while we integrate with external services, the data passed through them is not under our control and falls under their respective privacy policies and terms of service.
• ⚙️ Self-Hosting Freedom – Run your own email app with ease.
• 📬 Unified Inbox – Connect multiple email providers like Gmail, Outlook, and more.
• 🎨 Customizable UI & Features – Tailor your email experience the way you want it.
• 🚀 Developer-Friendly – Built with extensibility and integrations in mind.

Tech Stack

Zero is built with modern and reliable technologies:

• Frontend: Next.js, React, TypeScript, TailwindCSS, Shadcn UI
• Backend: Node.js, Drizzle ORM
• Database: PostgreSQL
• Authentication: Better Auth, Google OAuth

<!-- - Testing: Jest, React Testing Library -->

Getting Started

Video Tutorial

Watch this helpful video tutorial on how to set up Zero locally:

Prerequisites

Required Versions:

• Node.js (v18 or higher)
• pnpm (v10 or higher)
• Docker (v20 or higher)

Before running the application, you'll need to set up services and configure environment variables. For more details on environment variables, see the [Environment Variables](#environment-variables) section.

Setup Options

You can set up Zero in two ways:

Standard Setup (Recommended)

Quick Start Guide

1. Clone and Install

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

   # Install dependencies
   pnpm install

   # Start database locally
   pnpm docker:db:up

2. Set Up Environment

- Run pnpm nizzy env to setup your environment variables
- Run pnpm nizzy sync to sync your environment variables and types
- Start the database with the provided docker compose setup: pnpm docker:db:up
- Initialize the database: pnpm db:push

3. Start the App

bash
   pnpm dev

4. Open in Browser

Visit http://localhost:3000

Devcontainer Setup

Quick Start guide

1. Clone and Install

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

Then open the code in devcontainer and install the dependencies:

pnpm install

   # Start the database locally
   pnpm docker:db:up

2. Set Up Environment

- Run pnpm nizzy env to setup your environment variables
- Run pnpm nizzy sync to sync your environment variables and types
- Start the database with the provided docker compose setup: pnpm docker:db:up
- Initialize the database: pnpm db:push

3. Start The App

bash
   pnpm dev

Visit http://localhost:3000

Environment Setup

1. Better Auth Setup

- Open the .env file and change the BETTER_AUTH_SECRET to a random string. (Use openssl rand -hex 32 to generate a 32 character string)

env
     BETTER_AUTH_SECRET=your_secret_key

2. Google OAuth Setup (Required for Gmail integration)

- Go to Google Cloud Console
- Create a new project
- Add the following APIs in your Google Cloud Project: People API, Gmail API
- Use the links above and click 'Enable' or
- Go to 'APIs and Services' > 'Enable APIs and Services' > Search for 'Google People API' and click 'Enable'
- Go to 'APIs and Services' > 'Enable APIs and Services' > Search for 'Gmail API' and click 'Enable'
- Enable the Google OAuth2 API
- Create OAuth 2.0 credentials (Web application type)
- Add authorized redirect URIs:
- Development:
- http://localhost:8787/api/auth/callback/google
- Production:
- https://your-production-url/api/auth/callback/google
- Add to .env:

env
     GOOGLE_CLIENT_ID=your_client_id
     GOOGLE_CLIENT_SECRET=your_client_secret

- Add yourself as a test user:

- Go to Audience
- Under 'Test users' click 'Add Users'
- Add your email and click 'Save'

> [!WARNING]
> The authorized redirect URIs in Google Cloud Console must match exactly what you configure in the .env, including the protocol (http/https), domain, and path - these are provided above.

3. Autumn Setup (Required for some encryption)

- Go to Autumn
- For Local Use, click onboarding button and generate an Autumn Secret Key
- For production, select the production mode from upper left corner and generate and fill the other fields. After that, generate an Autumn Secret Key

- Add to .env:

env
   AUTUMN_SECRET_KEY=your_autumn_secret

4. Twilio Setup (Required for SMS Integration)

- Go to the Twilio
- Create a Twilio account if you don’t already have one
- From the dashboard, locate your:

- Account SID
- Auth Token
- Phone Number

- Add to your .env file:

env
   TWILIO_ACCOUNT_SID=your_account_sid
   TWILIO_AUTH_TOKEN=your_auth_token
   TWILIO_PHONE_NUMBER=your_twilio_phone_number

Environment Variables

Run pnpm nizzy env to setup your environment variables. It will copy the .env.example file to .env and fill in the variables for you.
For local development a connection string example is provided in the .env.example file located in the same folder as the database.

Database Setup

Zero uses PostgreSQL for storing data. Here's how to set it up:

1. Start the Database

Run this command to start a local PostgreSQL instance:

bash
   pnpm docker:db:up

This creates a database with:

- Name: zerodotemail
- Username: postgres
- Password: postgres
- Port: 5432

2. Set Up Database Connection

Make sure your database connection string is in .env file. And you have ran pnpm nizzy sync to sync the latest env.

For local development use:

DATABASE_URL="postgresql://postgres:postgres@localhost:5432/zerodotemail"

3. Database Commands

- Set up database tables:

bash
     pnpm db:push

- Create migration files (after schema changes):

bash
     pnpm db:generate

- Apply migrations:

bash
     pnpm db:migrate

- View database content:

bash
     pnpm db:studio

> If you run pnpm dev in your terminal, the studio command should be automatically running with the app.

Sync

Background: https://x.com/cmdhaus/status/1940886269950902362
We're now storing the user's emails in their Durable Object & an R2 bucket. This allow us to speed things up, a lot.
This also introduces 3 environment variables, DROP_AGENT_TABLES,THREAD_SYNC_MAX_COUNT, THREAD_SYNC_LOOP.
DROP_AGENT_TABLES: should the durable object drop the threads table before starting a sync
THREAD_SYNC_MAX_COUNT: how many threads should we sync? max 500 because it's using the same number for the maxResults number from the driver. i.e 500 results per page.
THREAD_SYNC_LOOP: should make sure to sync all of the items inside a folder? i.e if THREAD_SYNC_MAX_COUNT=500 it will sync 500 threads per request until the folder is fully synced. (should be true in production)

Contribute

Please refer to the [contributing guide](.github/CONTRIBUTING.md).

If you'd like to help with translating Zero to other languages, check out our [translation guide](.github/TRANSLATION.md).

Star History


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🤍 The team

Curious who makes Zero? Here are our contributors and maintainers

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