iCloud vs ownCloud: What are the differences?
What is iCloud? *A cloud storage and cloud computing service *. Sign in to iCloud to access your photos, videos, documents, notes, contacts, and more. Use your Apple ID or create a new account to start using Apple services.
What is 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.
iCloud and ownCloud are primarily classified as "Cloud Storage" and "File Storage" tools respectively.