Email marketing for developers

Self-host it, drive it from a REST API and CLI, bring your own email provider, and own your data. Broadcast is the email platform built for people who’d rather run software than rent it—for a one-time license, not a subscription.

Buy Broadcast — $250 Read the docs

add a subscriber via the API

$ curl -X POST https://mail.yourdomain.com/api/v1/subscribers.json \
    -H "Authorization: Bearer $BROADCAST_TOKEN" \
    -H "Content-Type: application/json" \
    -d '{
      "email": "[email protected]",
      "tags": ["signup", "trial"],
      "custom_data": { "plan": "pro" }
    }'

{ "id": 4213, "email": "[email protected]", "is_active": true }

Built the way developers want their tools

Own the stack, automate everything, and never hit a per-subscriber paywall.

Self-hosted, one command

Runs as a Docker stack on your own Ubuntu server—app, jobs, and Postgres, no external services to wire up. You control deploys, backups, and upgrades.

REST API for everything

Manage subscribers, tags, custom data, and sending over a clean JSON API with token auth. Filter, paginate, and automate without touching the UI.

CLI & agent-friendly

Script campaigns and subscriber management from the command line—or let an AI agent do it over the API and MCP. See the agents & CLI docs.

Bring your own ESP

Send through Amazon SES, Postmark, Mailgun, SendGrid, or any SMTP relay—and switch any time. No lock-in. See which ESP to pick.

Transactional + marketing

Send password resets and receipts through the same platform as your newsletters and drip campaigns—one system, one set of credentials.

You own the data

Subscribers, events, and sending reputation live in your database on your server. Export it, query it, back it up—it’s yours.

Wire it into your app in minutes

Add subscribers on signup, tag them by behaviour, and trigger sequences—straight from your application code. The API uses bearer-token auth and returns JSON.

tag a subscriber after they upgrade

$ curl -X POST https://mail.yourdomain.com/api/v1/subscribers.json \
    -H "Authorization: Bearer $BROADCAST_TOKEN" \
    -H "Content-Type: application/json" \
    -d '{ "email": "[email protected]", "tags": ["customer"], "custom_data": { "plan": "enterprise" } }'

Full reference: Subscribers API · Agents & CLI · all docs.

No per-subscriber tax on your side projects

Hosted platforms charge more as your list grows. Broadcast is a one-time $250 license with unlimited subscribers—run it for your startup, your newsletter, and three side projects without the bill creeping up. Curious about the math? Read the true cost of email marketing at scale or run the calculator.

Frequently Asked Questions

Yes. Broadcast exposes a JSON REST API with bearer-token auth for subscribers, tags, custom data, filtering, and sending. See the API docs for the full reference.

Yes—Broadcast handles transactional sends (receipts, password resets, notifications) alongside marketing campaigns, through the same install and your chosen ESP.

A small Ubuntu VPS (from providers like Hetzner or DigitalOcean) runs it comfortably. It ships as a Docker stack with Postgres and background jobs included—no Redis or external services to manage. See the installation guide.

Yes. Because everything is available over the API and CLI, agents can manage subscribers and campaigns programmatically. See the agents & CLI docs.