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 S4 Alternatives
Want a really good S4 alternative? Take a look at these popular alternatives if you're hunting for software similar to S4. Let's take a quick peek at some comparison that highlight your device and platform.
ownCloud
FreemiumOpen SourceMacWindowsLinuxAndroidiPhoneBlackberryAndroid TabletiPadSelf-HostedSoftware as a Service (SaaS)Raspberry PiCloudronA safe home for all your data – Access & share your files, calendars, contacts, mail & more from any device, on your terms.
Features:
- Calendar integration
- Autotagging
- Self-hosted in intranet or private cloud
- Bookmarks
- Built-in Note Taker
- Built-in RSS reader
- Cloud Storage
- Delta Backup
- Delta Update
- File management
- File sharing
- File-sync
- Music Streaming
- No installation required
- Image Preview
- SAML Single Sign-On
- Calendar Sync
- Virtual filesystem
- Support for WebDAV
Spideroak One Backup
CommercialMacWindowsLinuxWebAndroidiPhoneiPadXfceSpiderOak provides an easy, secure and consolidated online backup, storage, access, sharing & sync tool for Windows, Mac OS X, and Linux (Ubuntu, Debian &...
Features:
- End-to-End Encryption
- Encrypted backups
- File Versioning
- Encryption
- Incremental backup
- Automatic Backup
- Backup
- Cloud Storage
- Folder sync
- Works Offline
- Real-time backup
- Security focused
- Selective synchronization
- Unlimited storage
Nextcloud
FreeOpen SourceMacWindowsLinuxWebAndroidiPhoneAndroid TabletiPadSelf-HostedF-DroidCloudronA 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
CrashPlan
CommercialWindowsWebAutomatic Data Loss Protection for Your Small Business $10 USD per month per computer. Never worry about losing business-critical data again. CrashPlan® for...
Features:
- Encrypted backups
- Backup
- Incremental backup
- AES encryption
- Automatic Backup
- File Versioning
- Multiple languages
- Unlimited storage
- Version and Source control
Duplicati
FreeOpen SourceMacWindowsLinuxDuplicati 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
Seafile
FreemiumOpen SourceMacWindowsLinuxWebAndroidiPhoneAndroid TabletiPadSelf-HostedSeafile is a professional open source cloud storage platform for organizations. It has complete file syncing and sharing features, reliable file storage and advanced...
Features:
- File-sync
- File Versioning
- Development API
- Encrypted sync
- File sharing
- Install Syslinux
- Isolated file libraries
- Support for Amazon S3
- Sync Network Drive
- Team Collaboration
- Virtual hard drive
IPFS
FreeOpen SourceMacWindowsLinuxBSDSelf-HostedIPFS 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
Tresorit
CommercialMacWindowsLinuxAndroidiPhoneAndroid TabletiPadTresorit is the end-to-end encrypted file sync and sharing solution which safeguards confidential information by design. Unlike other public cloud vendors, Tresorit has...
Features:
- Encrypted backups
- Encryption
- Security & Privacy
- Cloud Storage
- Cloud sync
- Duplicate File Finder
- Encrypted links
- Encrypted photo upload
- Encrypted sync
- End-to-End Encryption
- File sharing
- File Storage
- File-sync
- File transfer
- File Versioning
- Integrated File Sharing
- Location-based
- Outlook integration
- Real time collaboration
- Secure File Sharing
- Selective synchronization
- Two factor authentication
- Support for WebDAV
BackBlaze
CommercialMacWindowsOnline backup for $5 month unlimited space. Backblaze backup encrypts and uploads all your data – no questions asked. No picking files. No digging through folders. Your...
Features:
- Cloud Storage
- Incremental backup
- Remote backup
- Backup
- Encrypted sync
- Unlimited storage
BackBlaze
CommercialMacWindowsOnline backup for $5 month unlimited space. Backblaze backup encrypts and uploads all your data – no questions asked. No picking files. No digging through folders.
Features:
- Cloud Storage
- Incremental backup
- Remote backup
- Backup
- Encrypted sync
- Unlimited storage
OwnDrive
FreemiumMacWindowsLinuxWebAndroidiPhoneiPadOwnDrive is a security and privacy oriented cloud storage service that gives access to people’s data anywhere, anytime and from any device. OwnDrive makes storing...
Features:
- Built-in Image viewer
- Built-in player
- Built-in RSS reader
- CalDAV
- Cloud Storage
- Contacts
- File sharing
- Integrated PDF Viewer
- Support for WebDAV
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S4 Reviews
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