IceWarp Alternatives

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.

Google's encompassing suite of cloud-based business apps.

Optimize your schedule with custom booking pages and calendar integrations

Try for free freemium $29.0 / One-off ($29 one-time paymnet)

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

KerioConnect is a commercial mail and groupware server.

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

freemium $1.0 / Monthly (per user)

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

Boost your productivity with reliable access anywhere with services like email, calendar, file sharing, meetings, instant messaging, and Office Online

MailEnable is a Windows based mail server and email server program that is packed with the state of the features and functions like antivirus and spam filtering system, webmail management system, cardDAV, CalDAV and much more.

hMailServer is a free e-mail server for Microsoft Windows.

Secure email with absolutely no compromises. Get your free encrypted email account today.

freemium €5.0 / Monthly (user - 5 GB)

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

Open Source

SmarterMail is a next generation email management server that is offering several business collaboration and communication features as well.

Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.