Windows, macOS & Linux
One backup tool across every desktop - a native app, a terminal interface, and a command line - fully localized in 24 languages.
Encrypted backup you control
Everything a serious backup needs. Nothing you don't.
End-to-end encrypted, deduplicated backups to the storage you choose - with real snapshot restore, scheduling, and retention, across Windows, macOS, and Linux.
Since 2005
Not our first backup - our best one
Nyx is built by the engineer behind AltDrive Online Backup, an unlimited-backup service that ran from 2005 to 2018 - with a background in critical, regulated-industry software. Two decades of hard-won lessons, rebuilt so you own the storage, the keys, and the format. Read our story.
Zero-knowledge
Encrypted before it ever leaves your machine
Files, names, folder structure, and manifests are encrypted locally with AES-256-GCM. The key is generated on your machine and never leaves it - we never receive your data or your keys, and could not read them if we were asked to.
Efficient
Fast, space-efficient incremental backups
Content-defined chunking with deduplication and zstd compression means only the parts of files that actually changed are uploaded. After the first backup, runs are quick and light on bandwidth and storage.
Point-in-time
Browse snapshots and restore any version, in the app
Every backup is a point-in-time snapshot. Browse them, preview the tree, and restore a single file, a folder, or everything - to this machine or another - exactly as it was, right in the app.
Your storage, your choice
Point it at a destination you already control
You hold the account and the keys - we never store, proxy, or see your data, and charge no storage fees. And because any S3-compatible service works, the real list runs to dozens of providers. See the storage setup guides.
- Amazon S3
- Backblaze B2
- Wasabi
- Azure Blob Storage
- Google Cloud Storage
- Any S3-compatible
- SFTP
- SMB / CIFS
- WebDAV
- Google Drive
- OneDrive
- Dropbox
- Local / network drive
No phone-home
Your license is a signed file verified entirely offline. No account, no validation server. Optional, anonymous usage telemetry you can switch off.
No lock-in
The archive format is documented and versioned (see the format spec), so your data stays independently recoverable for the long haul.