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S4 Alternatives

S4 Alternatives

S4

S4 is an Amazon S3-based application of Least-Authority File System, or LAFS. LAFS is a free, open source cloud storage system with verifiable end-to-end security. It distributes your data across multiple servers. Even if some of the servers fail or are taken over by an attacker, the entire filesystem continues to function correctly, preserving your privacy and security.

What is Least-Authority Backup good for?

It is good for securely backing up your data off-site. The "tahoe backup" command inspects your local filesystem for files that have changed since the last time you ran it. It uploads each file that has changed and it creates a directory in LAFS to hold the current "snapshot"—the current version of each of the files. You can browse or access old versions just by browsing the old snapshot directories.
Where is my data stored?

Your data, encrypted, is stored on Amazon's Simple Storage Service (S3), which is a convenient, reliable, and widely understood platform for storage.

Data is replicated according to the following policy decribed in Amazon's Overview of Security Processes:

Data stored in Amazon S3, Amazon SimpleDB, or Amazon Elastic Block Store (EBS) is redundantly stored in multiple physical locations as part of normal operation of those services and at no additional charge. Amazon S3 and Amazon SimpleDB provide object durability by storing objects multiple times across multiple Availability Zones on the initial write and then actively doing further replication in the event of device unavailability or detected bit-rot.

How much do the services cost?

S4 costs $25 per month for unlimited storage, for personal use.

Best Free S4 Alternatives

Looking for some programs similar to S4? Here are the top-recommended programs we found. Let's take a look if there's anything out there that helps you on whatever platform you're using.

Nextcloud

Nextcloud

FreeOpen SourceMacWindowsLinuxWebAndroidiPhoneAndroid TabletiPadSelf-HostedF-DroidCloudron

A safe home for all your data – Access & share your files, calendars, contacts, mail & more from any device, on your terms.

Features:

  • Privacy focused
  • Calendar integration
  • Sync Contacts
  • File-sync
  • Self-hosted in intranet or private cloud
  • Two factor authentication
  • Cloud sync
  • Ad-free
  • Customizable
  • On-premises software
  • Security focused
  • CalDAV
  • End-to-End Encryption
  • Integrated Email Client
  • Integrated File Sharing
  • Mobile friendly
  • Multi-platform support
  • Calendar Sync
  • Support for ActivityPub
  • Built-in RSS reader
  • Collaborative Text Editor
  • Custom applications
  • Extensible by Plugins/Extensions
  • Federated Cloud
  • File sharing
  • LDAP Services
  • Openstack swift integration
  • Secure File Sharing
  • Sync notes
  • Video calling
  • Support for WebDAV
  • Auto Updates
  • Bookmark organization
  • Built-in Download Manager
  • Built-in Note Taker
  • CardDAV
  • Cloud Storage
  • Sync Contacts
  • Cross-platform
  • Support for Docker
  • Encryption is optional
  • Extensibility
  • Fast motion
  • File management
  • File Tagging
  • Hostable
  • In built video player
  • Integration
  • Keepass integration
  • LDAP support
  • LibreOffice Integration
  • Local server
  • Local Storage
  • MarkDown support
  • Modular extensions
  • Music Player
  • News aggregator
  • Notetaking
  • OCR
  • One Time Passwords
  • Onlyoffice integration
  • Permission system
  • Photo synchronization
  • Privacy Protected
  • Real time collaboration
  • Real-Time Synchronization
  • Security & Privacy
  • Large File Transfer
  • Shared calendars
  • Social feed
  • Storage control
  • Sync across Devices
  • Sync phone location
  • Sync SMS
  • Tablet support
  • Task time tracking
  • Team Collaboration
  • Two-Step verification
  • 2 way sync
  • Unlimited private repos
  • Unlimited storage
  • Unlimited users
  • Video calling
Duplicati

Duplicati

FreeOpen SourceMacWindowsLinux

Duplicati is a backup client that securely stores encrypted, incremental, compressed backups on local storage, cloud storage services and remote file servers. The...

Features:

  • Encrypted backups
  • Schedule Backup
  • Cloud Storage
  • Encryption
  • Incremental backup
  • Automatic Backup
  • Cross-platform
  • Data deduplication
  • Email notifications
  • Local Storage
  • Support for Amazon Glacier
  • Web-Based
  • WebUI Management
  • Backup
  • Backup to Google Drive
  • Cloud sync
  • File Compression
  • File Versioning
  • Guided configuration
  • Multiple languages
  • Retention Schedule
  • Support for SFTP
  • Support for WebDAV
IPFS

IPFS

FreeOpen SourceMacWindowsLinuxBSDSelf-Hosted

IPFS is a global, versioned, peer-to-peer filesystem. It combines good ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm...

Features:

  • Peer-To-Peer
  • Based on Blockchain
  • Decentralized
  • Distributed
  • Double Donut Chart
  • File sharing
  • Virtual filesystem

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