Open-source email infrastructure — send, receive, and manage emails at scale.
Self-host on your own servers or use the hosted service from Reloop Labs.
No vendor lock-in. Full transparency. No proprietary black boxes.
Reloop gives you the same capabilities as SendGrid, Mailchimp, Resend, and Loops — but the codebase is open source and fully self-hostable.
- Transactional email — REST API and SMTP relay for programmatic sending
- Email campaigns — broadcast and sequence campaigns with audience segmentation
- Inbound email — receive, parse, and process incoming mail at your own domain
- Email templates — a visual drag-and-drop editor built for developers and marketers
- Real-time analytics — open rates, click rates, bounces, and delivery events stored in PostgreSQL
- Webhooks — push delivery events to your own endpoints the moment they happen
- Contacts & lists — manage subscribers, tags, and suppression lists
- Workflows — automate multi-step email sequences triggered by user actions
- API keys & auth — granular API key management with team-level permissions
Use Reloop as a hosted service (Reloop Labs handles the infrastructure) or self-host on Docker, Kubernetes, or bare metal. Same APIs. Same features. Your choice.
| Reloop | SendGrid / Mailchimp / Resend | |
|---|---|---|
| Open source | ✅ | ❌ |
| Self-hostable | ✅ | ❌ |
| Vendor lock-in | ❌ None | ✅ Locked in |
| Transparent pricing | ✅ | ❌ |
| Data stays on your servers | ✅ (self-hosted) | ❌ |
Developers who need a reliable email API without vendor lock-in — integrate via REST or SMTP, manage sending domains, and receive webhook events for every delivery state.
DevOps and platform teams who want full control over their email infrastructure — run Reloop on your own servers, inspect every component, and keep all data inside your network.
Marketing and growth teams who need campaign tools and audience management without depending on a proprietary SaaS platform that can change pricing or terms at any time.
git clone https://github.com/reloop-labs/reloop.git
cd reloop
bun setup
bun devFor full setup instructions — prerequisites, environment config, Docker services, database setup, and per-service commands — see the Setup Guide →
| Setup Doc | Description |
|---|---|
| Setup overview | Full step-by-step local setup |
| Architecture overview | Monorepo layout and tech stack |
| Port reference | All local ports and gateway routes |
| Backend services | Per-service setup guides |
| Frontend apps | Web, dashboard, docs, links |
Deploy the whole stack on a fresh Ubuntu 22.04/24.04 or Debian 12/13 server with one command:
curl -fsSL https://reloop.sh/install.sh | sudo bashThe installer runs preflight checks, installs Docker, prompts for your domain, generates production secrets, deploys every service, verifies health, and prints the DNS records to add. See the VPS guide →
Reloop is also available as a fully managed hosted service from Reloop Labs — same codebase, zero infrastructure to run. Sign up at reloop.sh.
Read CONTRIBUTING.md for guidelines on reporting bugs, requesting features, branch conventions, commit format, and the pull request process.
- 💬 Discord — Join the community
- 🐦 Twitter/X — Follow @reloop_labs
- 💼 LinkedIn — Follow on LinkedIn
- 🐙 GitHub Issues — Report bugs or request features
- 📚 Documentation — reloop.sh/docs
- 📋 Changelog — CHANGELOG.md
- 🆘 Support — reloop.sh/support
Reloop is open source under the Business Source License.
Built by Reloop Labs · Give us a ⭐ if Reloop saves you from vendor lock-in.