Google Workspace vs Microsoft 365 vs Nextcloud Hub vs OnlyOffice vs Proton Business Suite vs Zoho Workplace: Which Alternative is Best? (2026)

No, Google Workspace is a fully managed cloud service and does not support self-hosting any of its core applications such as Gmail, Docs, or Drive. All data and services run on Google's infrastructure, so organizations seeking self-hosted alternatives will need to consider other platforms.

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Google Workspace offers offline editing capabilities through the Chrome browser with the Google Docs Offline extension enabled. Users can create, view, and edit Docs, Sheets, and Slides offline, and changes will sync automatically once an internet connection is restored. However, offline functionality is limited to Chrome and some mobile apps, and requires prior setup.

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Organizations retain ownership of all data stored in Google Workspace. Google acts as a data processor under the terms of service and data protection agreements. Admins have granular control over data access, sharing policies, and retention through the admin console, but ultimate physical data control remains with Google’s cloud infrastructure.

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Google Workspace provides extensive APIs for Gmail, Drive, Calendar, and other services, but there are quota limits on requests per user and per project to prevent abuse. Some APIs have restricted scopes requiring explicit user consent or admin approval. Additionally, certain advanced features available in the UI may not be exposed via APIs.

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Google provides native migration tools such as the Data Migration Service for emails from Exchange, IMAP, and other platforms, and Drive File Stream or Backup and Sync for documents. For large-scale migrations, using Google Workspace Migrate is recommended. Exporting data from Google Workspace is supported via Google Takeout or admin export tools to ensure data portability.

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Microsoft 365 is a fully cloud-based subscription service and does not support self-hosting of its core services like Exchange Online, SharePoint Online, or Teams. While desktop Office apps can be installed locally, the backend services require Microsoft's cloud infrastructure. Organizations needing on-premises solutions can consider Exchange Server or SharePoint Server, but these are separate products and do not offer the full Microsoft 365 cloud experience.

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Microsoft 365 desktop apps such as Word, Excel, and PowerPoint fully support offline editing. Changes made offline automatically sync to OneDrive or SharePoint when the device reconnects to the internet. However, real-time collaboration features require online connectivity. Teams and Outlook also offer some offline capabilities, but with limited functionality until reconnected.

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Organizations retain ownership of their data stored in Microsoft 365. Microsoft acts as a data processor and provides extensive compliance and security controls, including data residency options, encryption, and audit logs. Admins can configure data loss prevention policies and control access via Azure Active Directory. However, data is stored in Microsoft-managed cloud data centers, so organizations must trust Microsoft's security and privacy practices.

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Microsoft 365 provides robust REST APIs via Microsoft Graph for accessing data across services like Outlook, OneDrive, and Teams. However, some APIs have throttling limits, and certain advanced features or admin controls may not be exposed via APIs. Additionally, API permissions require careful configuration in Azure AD, and some endpoints have usage quotas or require specific licensing tiers.

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Microsoft 365 supports exporting data via tools like the Microsoft 365 Compliance Center for eDiscovery exports, and the SharePoint Migration Tool for moving files. Outlook data can be exported as PST files. For large-scale migrations, third-party tools or Microsoft FastTrack services are recommended. However, some data types, such as Teams chat history, have limited export capabilities and may require additional compliance exports or APIs.

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Self-hosting Nextcloud Hub requires moderate IT expertise. You need to manage the server environment (Linux preferred), database setup (MySQL/MariaDB or PostgreSQL), and PHP dependencies. Additionally, you must configure HTTPS, storage backends, and optionally integrate external authentication. While installation is straightforward with official documentation and Docker images, ongoing maintenance includes updates, backups, and monitoring. For mid-sized organizations, dedicating a system administrator or DevOps resource is recommended to ensure stability and security.

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Nextcloud Hub supports offline access primarily through its desktop and mobile clients, which sync files locally for offline availability. However, offline editing of office documents depends on the client application used. The integrated Collabora Online or OnlyOffice editors require online connectivity for real-time collaborative editing. For offline editing, users can open synced documents with local office suites (e.g., LibreOffice) and sync changes back once online. Thus, offline editing is possible but not natively integrated into the web-based editors.

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Nextcloud Hub is designed for full data ownership by allowing organizations to deploy the platform on-premises or in a sovereign cloud environment of their choice. All files, metadata, and collaboration data reside on infrastructure controlled by the organization. No third-party cloud provider has access unless explicitly configured. Additionally, Nextcloud supports end-to-end encryption for files and integrates with existing identity management systems to maintain compliance with data governance policies. This architecture ensures that organizations retain complete control over their data.

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Nextcloud Hub offers a comprehensive REST API covering file operations, user management, sharing, and app integrations. However, some limitations exist: certain advanced collaboration features (like real-time document editing state) are not exposed via API, and rate limiting may apply depending on server configuration. Also, API stability can vary between major Nextcloud releases, so integrations should handle version compatibility. For custom workflows, the app framework allows extending API capabilities, but this requires development effort.

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Migrating to Nextcloud Hub typically involves exporting data from existing cloud services (e.g., Google Drive, Dropbox) using their export tools or APIs, then importing files into Nextcloud via WebDAV, the desktop sync client, or command-line tools. For email, calendar, and contacts, standard protocols like IMAP, CalDAV, and CardDAV facilitate migration. There is no universal automated migration tool, so planning for incremental data transfer and user training is essential. Nextcloud also supports external storage mounts to access legacy data during transition.

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Setting up OnlyOffice self-hosted requires deploying multiple components such as Document Server, Community Server, and optionally Mail Server. For a mid-sized organization, it typically involves configuring Docker containers or using Debian/Ubuntu packages, setting up SSL certificates, and integrating with existing user directories (LDAP/Active Directory). While the official documentation is comprehensive, some Linux server administration experience is recommended. Overall, setup can take a few hours to a couple of days depending on infrastructure familiarity.

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OnlyOffice desktop editors support offline editing fully for documents stored locally. When connected to OnlyOffice Workspace or cloud storage, documents can be cached locally for offline access. Once the device reconnects to the internet, changes are synchronized automatically with the server, resolving conflicts via version history. However, real-time collaboration features require an active connection and are not available offline.

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When self-hosted, OnlyOffice gives organizations full control over their data since all documents, user data, and collaboration metadata reside on their own servers. This setup enables compliance with strict data privacy regulations and internal policies. In contrast, using OnlyOffice cloud means data is stored on OnlyOffice's managed infrastructure, which may not meet all compliance requirements. Self-hosting also allows customization of backup, encryption, and access control policies.

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OnlyOffice provides REST APIs for document editing, user management, and integration with external storage or authentication providers. However, some advanced features like real-time collaborative editing and granular permission controls are limited or require additional configuration. The API documentation is evolving, and certain endpoints may lack extensive customization options compared to larger suites. Rate limiting and API request quotas depend on deployment type and licensing.

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OnlyOffice supports native editing of Microsoft Office formats (DOCX, XLSX, PPTX) without conversion, enabling direct import. For migration, it is recommended to bulk export documents from Microsoft 365 or SharePoint in their native formats and upload them to OnlyOffice Workspace or your self-hosted instance. OnlyOffice preserves formatting and metadata well, but complex macros or embedded objects may require manual adjustment. Export back to MS Office formats is also supported for interoperability.

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Proton Business Suite is a fully managed cloud service and does not offer a self-hosted deployment option. All data is stored on Proton's encrypted servers, ensuring strong privacy but requiring reliance on their infrastructure.

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Proton Business Suite supports offline access primarily for emails via Proton Mail's web and mobile apps with local caching. However, calendar and drive components have limited offline functionality and require internet connectivity for full use.

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Users retain full ownership of their data in Proton Business Suite. All data is end-to-end encrypted, meaning Proton cannot access user content. This encryption applies to emails, calendar events, and files stored in Proton Drive.

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Proton Business Suite currently offers limited API support focused on email and calendar functionalities. It lacks extensive APIs for drive or VPN features, which restricts deep integration with complex enterprise workflows.

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Proton Business Suite supports standard IMAP import for emails and iCal/ICS import for calendar events. However, migration tools are basic and may require manual steps for complex data sets or large-scale migrations.

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Zoho Workplace is primarily a cloud-based SaaS platform and does not offer an official self-hosted version. All core services like email, document editing, chat, and meetings run on Zoho's infrastructure, so on-premises deployment is not supported.

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Zoho Workplace provides limited offline functionality. Zoho Docs and Mail web apps allow offline access and editing through browser caching, but the experience is not as seamless or feature-complete as desktop office suites. Offline changes sync once connectivity is restored.

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Data stored in Zoho Workplace remains the property of the customer. Zoho acts as a data processor and complies with major data protection regulations (GDPR, CCPA). Customers retain control over their data with options to export or delete it. Zoho states they do not use customer data for advertising purposes.

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Zoho Workplace offers APIs for email, document management, chat, and meetings, but they have rate limits and some feature restrictions compared to full UI capabilities. For example, advanced document formatting and real-time collaboration features may not be fully accessible via API. API usage is subject to Zoho's quota policies.

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Zoho provides migration tools for email (IMAP, PST import) and document import from formats like Microsoft Office and Google Docs. However, complex formatting and macros may not always convert perfectly. Migration requires planning and testing to ensure data integrity and formatting compatibility.

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