Nextcloud

Nextcloud speaks for itself; It's the next evolution in cloud infrastructure. Self hosted and open source. With help from this toolkit users can securely store and sync all of their required day to day information between their devices, backed up on their own home server. Returning the information back into your hands and removing the need for online 3rd-party cloud utilities such as Google Drive, Photos, Notes, Microsoft OneDrive, OneNote, and Apple iCloud.

To find out more about this self-hosted cloud utility you can visit their website here.