From what I can see (used to use ownCloud, switched to Nextcloud), this is the general overview: * ownCloud is more stability-focused, used by large corporatio

From what I can see (used to use ownCloud, switched to Nextcloud), this is the general overview: * ownCloud is more stability-focused, used by large corporations, slower release schedule. * Nextcloud is like more experimental, with new updates every two weeks, adding new features constantly, two major versions in front of ownCloud. So, I tend to think them as ownCloud being kind of like Ubuntu LTS release, and Nextcloud being a regular six-month release. They also cooperate a lot and build on top of each other (for example, Nextcloud just makes a skin on top of ownCloud's desktop client). Also, Nextcloud's app community seems more vibrant than ownCloud's.