Software
We've compiled a list of 23 free and paid alternatives to S4. The primary competitors include ownCloud, SpiderOak. In addition to these, users also draw comparisons between S4 and Nextcloud, CrashPlan, Duplicati. Also you can look at other similar options here: Backup and Sync Software.
We've compiled a list of 23 free and paid alternatives to S4. The primary competitors include ownCloud, SpiderOak. In addition to these, users also draw comparisons between S4 and Nextcloud, CrashPlan, Duplicati. Also you can look at other similar options here: Backup and Sync Software.
778
A safe home for all your data – Access & share your files, calendars, contacts, mail & more...
670
SpiderOak provides an easy, secure and consolidated online backup, storage, access, sharing &...
523
A safe home for all your data – Access & share your files, calendars, contacts, mail & more...
256
209
Duplicati is a backup client that securely stores encrypted, incremental, compressed backups on...
157
148
115
93
73
Tresorit offers end-to-end encrypted cloud storage with AES-256 encryption. Control access, collaborate securely with group folders, and choose data residency. Features include file versioning, deleted file recovery, and file requests. Business plan…
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S4 = Simple Secure Storage Service.
S4 = Simple Secure Storage Service.
Linux
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.
File Storage
Client side encryption
Backup
Apps with End-to-End Encryption
Access Control
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