Sync is end-to-end encrypted cloud storage that keeps files private with zero-knowledge encryption, automatic real-time backup, and secure sharing. Its desktop app creates a folder that stays current across computers, phones, and the web.
Sync is a privacy-focused cloud storage service that encrypts your files on your own device and then keeps copies consistent across every computer, phone, and browser you sign in from. The desktop app creates a local folder that behaves like any other directory; anything saved inside it uploads automatically and appears on your other devices within seconds. Files can be shared through links protected by passwords, expiry dates, and download limits, and recipients do not need an account. Deleted items and earlier versions are recoverable from the web panel, and the Vault gives you cloud-only storage for material you want archived rather than mirrored to every machine.
Under the hood, Sync uses zero-knowledge authentication, meaning your password never reaches the server in a form that can be replayed or read. Files are split into encrypted chunks with their own keys, and metadata such as file names can be hidden from the provider. Two-factor authentication, granular per-user permissions, remote wipe, and an events timeline cover the administrative side, while an account rewind service lets paid subscribers roll the entire account back to an earlier point. Teams can share folders with read-only or read-write access and manage onboarding centrally. If you would rather run the storage yourself, Nextcloud is the self-hosted alternative worth comparing.
The appeal of Sync is that it removes the usual trade-off between privacy and convenience. Files are encrypted before they leave your machine, the service does not sell or mine your data, and you keep ownership of everything you upload. Because the desktop client behaves like an ordinary folder, there is no new workflow to learn: you save a document where you always have, and it is protected and backed up automatically. Recovery features matter just as much in practice. Version history restores a file you saved over, the trash retains deleted items, and the account rewind service can undo a ransomware incident or a bad bulk edit across an entire account. Sharing links with passwords, expiry dates, and download limits keep client or patient material under your control, while upload-enabled links collect files from people who have no account. For teams, per-user permissions and remote wipe reduce the risk of a lost laptop turning into a breach.
Key capabilities and highlights.
Files are encrypted on your device before they are uploaded, and the keys needed to decrypt them never reach the servers in a usable form. Even the provider cannot read your documents, photos, or folder structure, which makes the service suitable for confidential client, legal, or medical material.
The desktop client maintains a folder that uploads changes the moment you save them, so the same version of a file appears on your other computers, phones, and the web panel without manual transfers. Conflicts are handled automatically, and notification prompts tell you when something needs attention.
Selective sync lets you choose which folders download to each machine, which keeps a large library from consuming the drive on a laptop with limited space. The Vault stores files only in the cloud, making it a practical archive for completed projects and long-term backups.
Any file or folder can be shared through a link that works for people without an account. You can attach a password, set an expiry date, cap the number of downloads, and receive notifications when the link is opened, then revoke access at any time.
An upload-enabled link turns a folder into a drop box: clients or colleagues send files of any size without installing anything or creating an account. This replaces email attachments for large deliverables and keeps incoming material in a folder you control.
Version history lets you preview and restore an earlier copy of any file, while deleted items remain in the trash before permanent removal. The account rewind service goes further, rolling an entire account back to a point before a ransomware attack or an accidental bulk deletion.
Shared folders let several people work from the same encrypted directory with access levels such as read-only, read-write, or upload-only. Administrators manage users centrally, see recent activity on an events timeline, and can remotely wipe a device that is lost or stolen.
Phone apps upload photos and videos automatically, so a lost handset does not mean lost memories, and any file can be opened or shared from mobile. Businesses can brand a client portal with their own logo to collect and deliver documents without granting full account access.
Browse historical releases and previous builds.
No old versions have been added yet.
Common questions about Sync.
The short answer is encryption keys. Most services encrypt files but hold the keys themselves, which lets the provider read your data or hand it over on request. Sync encrypts files on your device and keeps keys out of reach, so a breach exposes encrypted chunks rather than the contents of your documents.
No. Anyone with a link can open it in a browser, and you can add a password, an expiry date, and a download limit to control how it is used. Revoking a link ends access immediately, and notifications tell you when a recipient opens it.
Yes. Deleted items stay in the trash and earlier versions remain available in each file's history, so you can preview and restore the copy you need. Paid plans add an account rewind service that restores the whole account to a point in time before the mistake.
Yes. Shared folders support several users with different permission levels, administrators can add or remove people centrally, and remote wipe protects data on a device that goes missing. Compliance reporting covers common regulatory frameworks, which matters for regulated industries.
Yes. Selective sync lets you pick the folders that download to a specific machine, so a laptop with a small drive can hold only the projects you are actively working on. Files that are not selected stay in the cloud and remain available through the web panel or mobile apps.
The Vault is cloud-only storage, so files placed there are backed up but never mirrored to your computers. That makes it a good home for archived projects, finished client work, and large files you want to keep safe without spending local disk space on them.
Sync is end-to-end encrypted cloud storage that keeps files private with zero-knowledge encryption, automatic real-time backup, and secure sharing. Its desktop app creates a folder that stays current across computers, phones, and the web.
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