Nextcloud

Nextcloud gives you a single platform for file storage, video calls, document editing, email, and calendar. You can run it on your own server for free or pick a managed European host. Either way, you decide where your data lives.

The platform is built around Nextcloud Hub, which bundles Files, Talk, Office, Groupware, and an AI assistant into one interface. Files sync across desktop and mobile apps on all major operating systems. Talk handles video meetings, screen sharing, and group chat without needing a separate tool. Office lets teams edit documents, spreadsheets, and presentations together in real time.

The app store adds over 400 extensions for things like task boards, notes, password managers, and workflow automation. Because the code is fully open source, you can inspect exactly what runs on your server.

For organizations that need professional support, enterprise subscriptions start at 100 users and include guaranteed response times, security hardening, and clustering features. Nextcloud One offers a fully managed instance hosted in Germany if you want the benefits without running your own hardware.

Worth knowing

Self-hosting requires some technical knowledge. Setup is straightforward if you are comfortable with a Linux server, but it is not a one-click process for beginners. The Android app works but can feel sluggish, and large file uploads (over 4 GB) occasionally need a retry. Sync conflicts between devices sometimes require manual resolution. If you want hands-off management, Nextcloud One or a third-party European host removes most of that overhead.