Kopano is described as 'Puts an email, video meetings, calendaring, and file sharing solution within one single interface' and is a Mail Server in the office & productivity category. There are more than 10 alternatives to Kopano for a variety of platforms, including Web-based, Windows, Linux, Self-Hosted and Mac apps. The best Kopano alternative is Google Workspace. It's not free, so if you're looking for a free alternative, you could try Nextcloud Hub or Infomaniak kSuite. Other great apps like Kopano are Mailo, Kolab, Zimbra Collaboration Suite and Microsoft Exchange.
Google Workspace delivers a cloud-based suite combining Gmail, Calendar, Meet & Drive to enhance collaboration through tools like Docs and Sheets. Offers secure storage options, custom domain emails, and robust management capabilities with 2FA and 24/7 support.
Nextcloud is the most deployed on-premises file share and collaboration platform. Access & collaborate across your devices. As fully on-premises solution, Nextcloud Hub provides the benefits of online collaboration without the compliance and security risks.
Suite for secure email, calendaring, file sharing, chat, and online meetings, offering real-time collaboration on docs, GDPR compliance, customizable branding, renewable energy use, advanced user management, and all data hosted in Switzerland.
Kolab provides a FOSS communication & collaboration solution that can be completely self-hosted. Take back control of your data and access it via the webinterface, or existing mobile & desktop clients.
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.
Exchange business-class email helps increase user productivity while protecting your data. Get it as a hosted service or run it on your servers.
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).
grommunio (formerly known as grammm) efficiently combines all requirements of modern, digital communication and collaboration.
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.
OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and Exchange protocols.
Real-time email, chat, audio/video calls & conferences, file-sharing, and contacts app with a modern and intuitive UI.
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It works with Outlook like no other.