Nextcloud

Nextcloud is the self-hosted productivity suite that replaces an entire Google Workspace — file storage, calendar, contacts, mail, video calls, and document editing, all running on your own server. The file sync and sharing experience is genuinely polished, and the app ecosystem keeps expanding with new capabilities. What makes Nextcloud powerful is its modularity: you install exactly what you need and skip the rest. The Collabora and OnlyOffice integrations give you real Google Docs-style document editing. The main drawback is that it's a large, complex system — if you just want file storage, simpler alternatives like Seafile might be better. But if you want a complete cloud replacement, Nextcloud is the only open source option that comes close. The enterprise version adds support and compliance features, but the community edition is fully featured for personal and small team use.

Best for users who are comfortable following setup instructions or running a self-hosted tool.