OX Open-Xchange Alternatives & Competitors

Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.

Key Zimbra features:

Open Source Cost-Effective Scalability Feature-Rich

An open source mailserver suite.

Key mailcow features:

Comprehensive Feature Set Open Source Docker-based Deployment Active Community and Support

Open Source

The #1 email warming service to improve your deliverability by generating realistic and meaningful engagement to your emails. Easy-to-use solution to help you land in the main inbox instead of the spam folder. .

Key MailReach.co features:

Deliverability Improving Email Warming Meaningful Warming Content Smart Warming Algorithm

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Web-based IMAP email client.

Key Roundcube features:

Open Source User-Friendly Interface Extensibility Security

Open Source

Modoboa is a mail hosting and management platform including a modern and simplified Web User Interface.

Key Modoboa features:

Open Source Integration User-Friendly Interface Mail Security

Mail-in-a-Box provides webmail and an IMAP/SMTP server for use with mobile devices and desktop mail software and also includes contacts and calendar synchronization.

Key Mail-in-a-box features:

Ease of Setup Full Control Cost-effective Open Source

Open Source

A fully fledged, free email server solution, an open source project (GPL v2).

Key iRedMail features:

Open Source Comprehensive Features Easy Installation Excellent Documentation

Open Source

Mailu is a simple yet full-featured mail server as a set of Docker images.

Key Mailu features:

Open Source Lightweight Modularity Docker-based Deployment

Self hosted modern mail server.

Key WildDuck features:

Open Source Modern Protocol Support Scalability Multi-domain Support

Open Source

Postfix Admin is a web based interface used to manage mailboxes, virtual domains and aliases.

Key Postfix Admin features:

User-Friendly Interface Virtual Domain Management Feature Rich Open Source

Axigen is an integrated email, calendaring & collaboration platform, built on a Linux mail server technology.

Key Axigen features:

Integration Capabilities Security Features Cross-Platform Support User-Friendly Interface

Simple, easy and secure mail server with a convenient and simple interface.

Key Emails features:

Cost-Effective Instant Delivery Wider Reach Easy to Document

Email Marketing for Business Checkout a smart email marketing software that helps you grow your business & reach out to new customers.

Key Mailpeople features:

User-Friendly Interface Robust Security Features Comprehensive Analytics Customizable Templates

Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

Key Kolab Community features:

Open Source Software Comprehensive Groupware Flexible Deployment Strong Privacy Features