Cloud storage the provider can’t read.

Necron encrypts your files on-device. Keys stay on your USB drive. Only ciphertext reaches the cloud.

Necron Vault Manager encrypted vault interface showing file encryption controls and vault locations

Free personal tier • No credit card required

Free uses a software key on the device; Pro stores keys on your own USB key drive.

Available for Windows macOS Linux

The Problem

Your files aren’t as private as you think

Cloud providers can read your files

Most cloud “encryption at rest” is provider-controlled — they hold the keys. A breach, insider, or legal request can expose your data.

Your encryption key lives next to your data

Password-based encryption stores the derived key on the same machine as the data. If the machine is compromised, both are exposed.

One copy isn’t safe enough

A single encrypted folder in one location is vulnerable to deletion, corruption, sync failure, or tampering — with no way to recover.

How Necron Solves This

Your data and your keys travel on separate paths.

Your files
Necron Vault Manager Encrypts on your device
Local folder 🔒 encrypted
Google Drive 🔒 encrypted
Dropbox 🔒 encrypted
USB key drive

Files are encrypted on your device. Only ciphertext reaches storage. Keys never leave the USB drive.

Necron Vault Manager vault locations panel showing Local, Google Drive, Dropbox, OneDrive with green sync status checks

Multi-Cloud Mirroring

Only encrypted data is stored in synced locations

Keep one vault mirrored across multiple storage providers at once. Necron stores and syncs encrypted vault data only—the app simply presents a usable "view" when you access your files.

Necron Vault Manager master key and USB key drive status indicator showing hardware key connection

Keys Live on Your USB Key Drive

Keys are not stored on your computer or in the cloud

Your encryption keys are stored on a dedicated USB key drive, not on your computer or in the cloud. Keep backup drives to protect against loss—without copying keys onto a device.

Necron Vault Manager file list showing per-file encryption with Encrypt and Decrypt controls

Per-File Unique 256-bit Keys

A unique encryption key for every file

Every file gets its own unique 256-bit encryption key. Key material is managed separately from your encrypted vault data.

Necron Vault Manager vault integrity check interface with Check vault button and vault health statistics

Automatic Vault Recovery

Recover from a healthy mirrored copy

If a location goes missing or falls behind, the vault can reconcile and restore from healthy mirrors. Redundancy isn't just backup—it's built into the system's normal operation.

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Why Necron

Security without compromise

Local encryption

Plaintext is encrypted on your device before any cloud sync occurs.

Quantum-resilient design

Built on modern 256-bit symmetric cryptography chosen for strong long-term security. Post-quantum encryption explained →

No key escrow

We do not store your encryption keys on our servers. You control your key material.

How We Compare

Necron vs. the alternatives

Feature Cryptomator pCloud Encryption Necron Vault Manager Necron Vault Manager Pro
Bring your own cloud storage pCloud only
Local / client-side encryption
Key storage Password-derived Password-derived Software key on PC Dedicated USB drive
USB key-drive support incl. backup key
Mirror across multiple locations
Auto-recovery from healthy mirrors
Vault limit Unlimited 1 Crypto folder 1 vault Unlimited
Storage cap None BYOS Paid plans from $199 1 GB No cap
Price Free desktop $150 lifetime + storage $0 forever $39.90/yr

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