Open-source, peer-to-peer service offering encrypted file synchronization, ensuring data privacy and user-autonomy without relying on cloud storage or central servers, suitable for various uses.

Woelkli is described as 'Service that provides secure cloud storage hosted in Switzerland. Save, view, edit and share your files from anywhere in the world, from any device' and is a Cloud Storage service in the backup & sync category. There are more than 50 alternatives to Woelkli for a variety of platforms, including Web-based, Windows, Mac, iPhone and Android apps. The best Woelkli alternative is Syncthing, which is both free and Open Source. Other great apps like Woelkli are Dropbox, MEGA, Microsoft OneDrive and ownCloud.
Open-source, peer-to-peer service offering encrypted file synchronization, ensuring data privacy and user-autonomy without relying on cloud storage or central servers, suitable for various uses.

Synchronize and access files across multiple devices with secure cloud storage. Features include 2GB free storage, two-factor authentication, selective sync, offline access, shared folders, and built-in viewer, supporting various platforms and languages.




This cloud-storage service offers end-to-end encryption, selective synchronization, and shared folders without ads. Supports offline access, two-factor authentication, encrypted backup, a command-line interface, and dark mode for comfortable use.





Manage and share files securely across devices with OneDrive. It offers 5 GB free storage, direct Office integration, automatic backups, and file sync for seamless collaboration. Ideal for personal and business use with advanced data protection tools.




Self-hosted option for secure file sync, sharing, calendars, contacts, and mail supporting mobile, desktop, web access and external storage, real-time collaboration, password-protected links, document editing, anti-virus scanning, and LDAP integration.




Offers secure content management with workflow automation, AI-driven insights, 10GB free cloud storage, e-signature support, integration with 1,500+ apps, file-level security, offline access, document commenting, real-time search, and previews for 200+ file types.




Koofr is a safe, secure and simple way to store, backup and share your documents, photos, videos and more. It offers up to 10 GB of free safe storage for your files with affordable upgrades and options to connect multiple cloud accounts.




Open source cloud platform for organizations with self-hosting, device file synchronization, sharing, versioning, secure encrypted storage, admin controls, web access, audit logging, and support for desktop and mobile clients for secure collaboration.




Choose simplicity, get Cozy. We all have a life and a digital life. Cozy gathers them. In your Cozy, you have all your personal data: pictures, health, bank, holidays, accessible only by you. Welcome to your new digital home.




SpiderOak provides an easy, secure and consolidated online backup, storage, access, sharing & sync tool for Windows, macOS, and Linux (Ubuntu, Debian & Fedora). SpiderOak offers a different approach to online backup, synchronization, and sharing.

Lightweight file storage with a Rust backend and optimized binary for efficiency, offering responsive UI on desktop and mobile, simple setup, multilingual English and Spanish support, no PHP dependency, and designed for minimal resource use on home servers.

SyncTrayzor is a wrapper for Syncthing which allows Syncthing's window to be hidden in the tray area. SyncTrayzor has a built-in web browser to manage Syncthing without opening your browser. SyncTrayzor can be configured to automatically start at PC startup.

More space for free and very good performance!