Alternatives to: Microsoft 365

BlueMind is an open-source, collaborative email and communication platform designed to enhance team productivity and streamline workflows for enterprises.

Collabora Office is a fully featured, collaborative office suite available for desktop and mobile, offering both online and offline access to document editing.

Collabora Online is a secure and collaborative office suite enabling real-time document editing and co-authoring across various platforms.

Combell Email provides reliable and secure email hosting solutions with various packages, marketing tools, and 24/7 support.

Dovecot is a secure and high-performance IMAP server known for its flexibility, ease of use, and robust security.

Fruux is a secure, collaborative platform for managing contacts, calendars, and tasks across multiple devices.

Hostpoint E-Mail offers secure and reliable email hosting in Switzerland, integrated with a powerful cloud office suite for enhanced productivity.

Infomaniak kMail is a secure and user-friendly webmail service with integrated calendar and contacts, offering unlimited storage and strong privacy protection.

IPBRICK provides a secure, private cloud-based communication and collaboration platform designed to digitally transform businesses.

LibreOffice Online is an open-source, server-based collaborative office suite enabling visual editing of documents in a web browser, requiring integration with external systems for full functionality.

LibreOffice is a free and open-source office suite offering a full range of productivity tools compatible with Microsoft Office.

Maarch Courrier is a comprehensive electronic mail management solution that streamlines workflows, enhances collaboration, and ensures secure document handling through an intuitive interface and advanced features.

Mailcow is a dockerized, open-source mail server suite providing a user-friendly and scalable platform for email management.

Migadu is a secure, standards-compliant email hosting service offering unlimited addresses and domains at a flat rate, with direct postmaster support and a focus on user privacy.

Nextcloud Hub is a secure, integrated collaboration platform that combines file sharing, communication, and office tools for enhanced productivity and data control.

ONLYOFFICE is a collaborative office suite with document editors, spreadsheets, presentations, and PDF tools available online, offline, and for mobile devices.

Outline is a fast, collaborative knowledge base platform for teams to organize, share, and access information efficiently.

ownCloud Infinite Scale is a highly scalable, cloud-native data platform providing unified access to distributed data sources.

OX App Suite Cloud is a fully managed, global email platform that delivers a superior user experience, drives user engagement, and maximizes revenue generation opportunities.

Dovecot Pro is a high-performance, scalable, and fully supported email backend platform for large organizations.

PostfixAdmin is an Open Source web application for managing virtual users on Postfix mail servers.

Postfix is a fast, secure, and easy-to-administer mail server designed for UNIX-like systems.

Raidboxes Emails provides secure, reliable, and scalable email hosting with robust spam and virus protection, powered by Mailbox.org.

SCENARIchain-server is an Open Source platform for efficient document creation, publication, and distribution.

Seeweb Mail (Cloud Mail) is a secure, scalable, and user-friendly professional email hosting service for Italian businesses, ensuring reliable communication and data protection.

SOGo is a free and open-source groupware server providing a scalable and secure webmail solution for businesses and communities.

SOGo is a scalable, open-source groupware server providing a unified interface for email, calendar, and contact management.

Stackspin is an open-source platform providing a secure and easy-to-manage suite of collaborative apps for value-driven teams.

Stalwart Mail Server is a secure, scalable, and flexible open-source email platform.

Zimbra Core is a secure, open-source email and collaboration platform for businesses of all sizes.