Kurrier

The self-hosted open-source workspace for email, calendars, contacts and storage.

☁️ Try Kurrier Cloud (Hosted)

Don’t want to self-host right now?

Kurrier is also available as a fully hosted service at
👉 https://www.kurrier.io

• No setup or maintenance
• Bring your own email providers (SES, SMTP, Mailgun, Postmark)
• Shared workspaces, inboxes, identities, calendars, and contacts out of the box

👉 Create a free account →

_{Kurrier Cloud helps fund ongoing open-source development. You can self-host Kurrier at any time — no lock-in.}

✨ What's New

🎉 Kurrier Drive — integrated WebDAV/S3 storage

Store and manage files directly within Kurrier using WebDAV locally or S3-compatible storage Support for providers like AWS S3, Backblaze B2, MinIO, and DigitalOcean Spaces is coming soon. Have a provider you want first? Open an issue and let us know.

🎉 Sync your calendars across all your devices

Kurrier now supports Calendars and syncs your calendars through CalDAV, compatible with iOS, macOS, Android (DAVx⁵), Thunderbird, and all CalDAV-supporting apps.

Dark Mode:

🎉 Full CardDAV support — sync your contacts across all your devices

Kurrier now supports complete CardDAV sync, meaning your address book updates instantly across iOS, macOS, Android (DAVx⁵), Thunderbird, and any CardDAV-compatible app.

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🎉 Kurrier now supports Labels

Organize your inbox your way with flexible, multi-color labels.

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🚀 What is Kurrier?

Kurrier is a self-hosted, unified communication platform that brings together:

• 📧 Email (IMAP/SMTP/SES/SendGrid/Mailgun/Postmark)
• 📅 Calendars (CalDAV)
• 👤 Contacts (CardDAV)

All wrapped into a clean, fast, modern web UI — entirely powered by your providers and hosted on your infrastructure.

Kurrier lets you:

• Connect any email provider
• Sync calendars across devices
• Sync contacts across devices
• Manage multiple identities and domains
• Use SES/SendGrid/Mailgun as outbound identities
• Keep all data private and under your control

Whether you're running a personal server, a small-business mail setup, or a multi-domain environment, Kurrier gives you a beautiful unified interface without losing control of your data.

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💡 Why Kurrier?

Kurrier is designed as a next-generation alternative to traditional webmail and PIM suites:

• Connect any provider
  IMAP, SMTP, SES, SendGrid, Mailgun, Postmark — or your own mail server.

• Unified web interface
  Email, calendars, and contacts — consistent, fast.

• Self-hosted first
  Your data stays on your server. No third-party analytics. No vendor lock-in.

• Open standards
  IMAP/SMTP for mail, CalDAV for calendars, CardDAV for contacts.

• Modern app stack
  Next.js • TypeScript • Nitro • PostgreSQL — fast and extensible.

• Developer-friendly
  Clean APIs, delta sync model, extensible providers.

• Docker-ready
  Simple, reliable deployments.

Kurrier aims to combine the simplicity of a webmail client with the flexibility of a complete, modern communication backend — all under your control.

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📘 Next Steps

Ready to try it out?

👉 Read the documentation
Guides include installation, provider setup, instructions, and more.

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🖥 Screenshots

📨 Webmail View

Minimal, fast, keyboard-first email.

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🌙 Dark Mode

A beautiful, fully themed dark interface.

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🔌 Providers View

Connect IMAP/SMTP/SES/SendGrid/Mailgun/Postmark with ease.

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👤 Identity View

Manage multiple sender identities across providers.

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💙 Support Kurrier

Kurrier is an independent, open-source project built to make private, modern email infrastructure accessible and self-hosted.

If you find it useful, please consider supporting development:

👉 Donate to Kurrier

Every contribution helps with hosting, maintenance, and new features.

Thank you for supporting privacy-friendly communication software.

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🛠 Commercial Support

Need help integrating Kurrier into your business or infrastructure?

👉 Request Consulting

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🤝 Contributing

Contributions are welcome.

Please read the guidelines:
👉 Contributing Guide

PRs, issues, ideas, and feedback are all appreciated.

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