A Sync may exist between any two or more folders including two folders that exist as part of the same machine (e.g. between a desktop and an external hard-drive). The 5.0 series have introduced the SpiderOak Hive folder. Any items placed inside Hive will automatically upload and then sync to all your other devices (thus effectively replicating the Dropbox folder).
Note: While SpiderOak was formerly a free service, plans currently start at $6/month or $69/year. A 21-day free trial is available.
Seafile is a file hosting software system. Files are stored on a central server and can by synchronized with personal computers and mobile devices via the Seafile client. Files can also be accessed via the server's web interface. Seafile's functionality is similar to other popular services such as Dropbox and Google Drive, with the primary difference being that Seafile is free and open-source, enabling users to host their own Seafile servers without artificially imposed limits on storage space or client connections.
You can deploy Seafile on your own server for free using the Community Edition, which is opensource, or choose the Professional Edition, that is free for 3 users and has a yearly subscription for more users.
AeroFS lets you synchronize your files without servers and build private cloud storage out of your own devices.
How It Works
We strive to make AeroFS a simple and elegant product despite the complexities behind it:
We combine peer-to-peer technologies with advanced data replication algorithms to provide you with a private and distributed file system using your own devices. The p2p networking layer allows any two or more devices to communicate directly regardless of your network configurations. This means AeroFS will work in your LAN and over the Internet. Because AeroFS is completely distributed, even if we experience downtime, you won't!
The only automated sync, back-up, collaboration and file management service powerful enough for a business user and easy enough for a novice. Secure, anywhere access to your files.
Sync makes it easy to store, share and access your files from just about anywhere. Best of all, Sync protects your privacy with end-to-end encryption — ensuring that your data in the cloud is safe, secure and 100% private.
Keep your files safe, secure and 100% private Sync's encrypted cloud storage platform protects your privacy by ensuring that only you can access your data. Your confidential documents are completely safeguarded from unauthorized access, which is the only way you can truly trust the cloud.
Share any kind of file with anyone, quick and easy With Sync you can send files of any size to anyone, even if they don't have a Sync account. Multiple users can work from the same set of folders, and features such as file requests, password protection, notifications, expiry dates and permissions ensure that you're always in control.
Access your files from anywhere Sync backs up your files automatically, all in one centralized location, and keeps them synced across all of your computers and devices. With apps for Windows, Mac, iPhone, iPad, Android and the web, you'll never lose a file again.
odrive is a free service that makes it easy to manage, access, and share all of your files from one place. odrive supports integrations into more than 20 storage services, has full bi-directional desktop sync clients, CLI-based clients (including Linux), zero-knowledge encryption, placeholder files, a robust web client, advanced sharing capabilities, and more.
You can use odrive with: Dropbox Google Drive Amazon Drive Microsoft OneDrive Slack SharePoint Office 365/Microsoft OneDrive for Business Facebook Amazon S3 Wasabi DigitalOcean Spaces DreamHost DreamObjects MinIO S3 Compatible Storage Google Cloud Storage Backblaze B2 Instagram Box.net FTP FTPS SFTP WebDAV 4shared ADrive HiDrive Yandex Disk
Link as many accounts as you need, even multiple accounts on the same service.
The separate odrive Sync Agent, which supports Linux, Windows, and MacOS, provides advances users with a flexible, scriptable interface to odrive's powerful Progressive Sync engine. Use it to bring cloud access to almost any environment.