Perkeep

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Google Drive

Filestash is a free and open-source Dropbox-like file manager that can be used to manage data anywhere. Filestash allows you to bring your own backend or create your own by implementing a simple interface. Currently, Filestash works with Amazon S3, SFTP, FTP, FTPS, Minio, Backblaze, GIT, Github, Gitlab, WebDav, LDAP, CalDAV, CardDAV, Mysql, Dropbox, Google, Drive Gogs Gitea. Through Filestash intuitive interface you can manage photos and files and easily share then with friends and family via regular links or social accounts.

Sia is a decentralized storage platform secured by blockchain technology. The Sia Storage Platform leverages underutilized hard drive capacity around the world to create a decentralized data storage marketplace that is more reliable and lower cost than traditional cloud storage providers. With Sia you can store files in the decentralized cloud without signup requirements, servers and trusted third-party providers. On average, Sia's decentralized cloud storage costs 90% less than incumbent cloud storage providers. Storing 1TB of files on Sia costs about $1-2 per month, compared with $23 on Amazon S3.

Syncthing is a free and open-source continuous file synchronisation software that utilise peer-to-peer technology. The software allows users to send files between two or more computers in real time, safely protected from prying eyes. Syncthing is available for Windows, Mac, Linux, Android, Solaris, and BSD.

iCloud is a cloud storage service provided by Apple, the service is provided freemium to all owners of Apple devices like iPone, iPad and Mac's. With iCloud users can store and acces their photos, videos, documents, notes, contacts, and more.

Store your files in the cloud with Dropbox and use them across all your devices or share them with friends. Dropbox is a cloud backup services that can be used to store your files online in a secure fashion. With Dropbox you receive 2GB of free storage space when your register, you also get 500MB extra storage for every friend you refer. If you want more you have to opt for a paid subscription.

A cloud synchronization service for sharing files across computers and other devices. SugarSync allows you to backup, access, sync, and share files across variety of operating systems, such as Android, iOS, Mac OS X, and Windows devices. SugarSync also support Linux through third-party clients.