GoodSync

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Nextcloud

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.

odrive is a unified cloud storage solution that allow you to sync unlimited storage securely and efficiently to a folder on your desktop. With odrive, you can sync, share and backup your files securely. odrive integrates with thrid-party solutions like Amazon Drive, Dropbox, Google Drive, OneDrive, Box, S3, WebDAV, FTP, and more.

Duplicati is a free, open source, backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. The software was designed from the ground up to handle online backups of data with high efficiency. The software integrates with Amazon S3, Backblaze (B2), Box, Dropbox, FTP, Google Cloud and Drive, HubiC, MEGA, Microsoft Azure and OneDrive, Rackspace Cloud Files, OpenStack Storage (Swift), Sia, Tardigrade, SSH (SFTP), WebDAV, Tencent Cloud Object Storage (COS).

Librevault allows you to transfer data directly from one device to another, securely. Librevault is a free and open-source peer-to-peer file synchronization software, designed with convenience. privacy and security in mind. The software encrypts all data with AES-256 and uses TLS for all transmissions. Their goal is to make a better alternative to BitTorrent Sync and Syncthing.

With ownCloud, organizations can collaborate and be more production on their own secure enterprise file sharing (EFSS) platform. The ownCloud platform is self-hosted and allow for secure file sharing within an organization. The platform can be hosted on premise or on a cloud instance, controlled by the organization. The software is written in PHP and Javascript and is fully open source, released under the AGPLv3 license. ownCloud can run on most server hardware and operating systems, and the client for accessing ownCloud is available for Android, iOS, macOS, Linux and Windows.

The Auckland-based MEGA is a cloud service that provides 50GB of free storage space. With MEGA users can store, access and share files from anywhere. The company prides itself on building a powerful, convenient and privacy focused service that can be accessed via the web browser as well as natively on Android, iOS and Windows Phone.