Nextcloud

Nextcloud gives you your own Google Drive, Calendar, and Contacts without putting your files on someone else's servers. File storage, sharing, calendar, contacts, video calls, office document editing, email, tasks, notes, and a growing app store. It's the self-hosted productivity platform that tries to replace all of Google Workspace.

The community edition is free under AGPL-3.0. You get everything: file sync, 200+ apps from the app store, OnlyOffice/Collabora integration for document editing, end-to-end encryption, and the full groupware suite. No feature restrictions. Nextcloud Enterprise adds support contracts, branding, compliance certifications, and priority bug fixes. Pricing starts around $3,600/year for 100 users (basic support) and scales up with users and support tier. Self-hosting is the default. The Snap package or Docker image gets you running in 30 minutes. But running it well (with proper caching (Redis), a real database (MySQL/Postgres), and background jobs configured) takes real ops work. Performance degrades noticeably without tuning.

Solo developers: great personal cloud. Install on a $5/mo VPS and sync your life. Small teams: solid replacement for Google Workspace if someone can maintain it. Growing teams: the all-in-one approach means you're running one platform instead of ten, but the maintenance burden grows with users.

The catch: performance. Nextcloud is PHP-based and gets sluggish without Redis caching, database optimization, and proper PHP-FPM tuning. The mobile apps are functional but not polished. And the "app for everything" approach means some features feel bolted on rather than purpose-built.