Zimbra Collaboration Alternatives (January 2026)

Ad-free Business Email Hosting with a clean, easy-to-use interface. Integrated Business Calendar, Contacts, Notes, Tasks. Free for up to 5 users.

Secure hosted email with custom domain. Shared calendars, chat, storage, documents & apps. The only solution integrated and working together in one screen.

Zoho Workplace is a productivity and collaboration suite trusted by millions. It brings mail, chat, files, office suite, meetings, and more into one place.

Secure Windows or Linux mail server that includes chat, calendaring and contacts and offers a cost-effective alternative to Microsoft Exchange.

The most popular open source content collaboration platform for tens of millions of users at thousands of organizations across the globe

OX Cloud Email - Easy, Fast, Secure - Powerful email built for business

Reliable, secure, extensible, and customizable mail server software platform made for on-prem and cloud-native deployment; easily scalable, smart licensing.

We’re powering the next generation of secure email communications for your organization, preventing data leaks & empowering people to work securely.

Mailtrim provides secure Free email client software with its unique team collaboration Feature and is designed to serve the mailing needs of all business