Kurrier

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Open-source communication infrastructure, under your control.

Kurrier is a modern, self-hosted workspace for email, calendars, contacts and storage.

Connect the providers and infrastructure you already use while Kurrier gives you a unified web interface built around open standards.

If Kurrier is useful to you, please consider ⭐ starring the repository and sharing it with others who care about open, self-hosted infrastructure. Word of mouth and GitHub stars help the project grow, attract contributors, and accelerate development.

Documentation · Contributing · Website

✉️ Prefer a hosted solution?

Don't want to self-host? Kurrier Mail offers managed email hosting, shared inboxes, team collaboration, and SMTP/IMAP access from your favorite email clients.

Explore Kurrier Mail →

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What is Kurrier?

Kurrier brings the core tools of a modern communication workspace together without requiring you to hand control of your data to another platform.

• Email --- IMAP, SMTP, Amazon SES, SendGrid, Mailgun and Postmark
• Calendars --- CalDAV with synchronization across compatible devices and applications
• Contacts --- CardDAV address books and synchronization
• Storage --- integrated WebDAV/S3-backed file storage
• Authentication --- local authentication, Google and standards-based OIDC/SSO
• Management API --- programmatic provisioning and integration with external systems

Kurrier is designed to work with existing infrastructure rather than replace it. Bring your mail provider, object storage and identity provider, and run the application on infrastructure you control.

Built on open standards

Kurrier uses established protocols wherever possible:

IMAP · SMTP · CalDAV · CardDAV · WebDAV · OIDC · JMAP

This keeps Kurrier interoperable with existing servers, providers, desktop clients and mobile applications without locking your data into a proprietary ecosystem.

Self-hosted

Kurrier is designed to be deployed on your own infrastructure and includes Docker-based deployment support.

Configuration, installation requirements, provider setup, authentication, APIs and deployment instructions are maintained in the documentation.

Read the documentation →

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Contributing

Kurrier is open source and contributions are welcome --- from bug reports and documentation improvements to new providers and features.

Please read the Contributing Guide before opening a pull request.

If Kurrier is useful to you, ⭐ starring the repository is one of the easiest ways to support the project and help others discover it.

Support the project

Kurrier is independently developed and maintained.

Support Kurrier development

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Kurrier

Open source. Self-hosted. Built on open standards.