Amium vs ownCloud: What are the differences?
Amium: Turn any file into a real-time activity feed and conversation. Amium turns every file into a conversation thread and activity feed. Files are synced and shared so you can work on them together and in real-time. Changes show up immediately in the conversation thread, and will also sync to your device; ownCloud: Open source self-hosted web apps with sync clients and sharing. It is an open source, self-hosted file sync and share app platform. Access & sync your files, contacts, calendars & bookmarks across your devices. You decide what happens with your data, where it is and who can access it.
Amium and ownCloud can be categorized as "File Storage" tools.