The best Mail Server alternative to Google Workspace is Zimbra Collaboration Suite. It's not free, so if you're looking for a free alternative, you could try OpenChange or Mercury Mail Transport System. If that doesn't suit you, our users have ranked more than 50 alternatives to Google Workspace and 16 are Mail Servers so hopefully you can find a suitable replacement. Other interesting Mail Server alternatives to Google Workspace are IceWarp, Kopano, Microsoft Exchange and Kolab Now.
Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more. With the most innovative web application available today, Zimbra boosts the productivity of users on any desktop and dramatically reduces TCO compared to legacy platform vendors.
United States
All-in-one European business email and collaboration platform — email, chat, video conferencing, and office suite in one app. Cloud or self-hosted.
Czechia
EU
Kopano puts an email, video meetings, calendaring, and file sharing solution within one single interface.
NetherlandsEU
Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.
United States
Kolab Now provides a suite of intuitive apps in a user friendly environment to make your day to day online comms easier, smarter and most importantly; secure.
Switzerland
Axigen provides a multi-tenant, fully integrated, multi-platform, all-in-one email, calendaring and collaboration messaging solution. It grants extensive branding options and is localized in over 29 languages (including right-to-left writing mode).
ItalyEU
Kiteworks Secure File Sharing is a software offering a platform for secure collaboration, virtual data rooms, managed file transfer, and SFTP.
United States
Sanwhole Exchange is a server running iMail, iPress and iStore services. iMail is an enterprise-class email server does Microsoft Exchange and Gmail work. iPress sets blog, forums and tickets in one. iStore is an online store.
China
Amazon WorkMail is a secure, managed business email and calendar service with support for existing desktop and mobile email client applications.
Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.
Bosnia & Herzegovina
Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for companies that want control of their email. Integrated web-mail with doc sharing, Drop Box integration, client and server side encryption.
United Kingdom
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
