Necron encrypts your files on-device. Keys stay on your USB drive. Only ciphertext reaches the cloud.
Free personal tier • No credit card required
Free uses a software key on the device; Pro stores keys on your own USB key drive.
The Problem
Most cloud “encryption at rest” is provider-controlled — they hold the keys. A breach, insider, or legal request can expose your data.
Password-based encryption stores the derived key on the same machine as the data. If the machine is compromised, both are exposed.
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
Files are encrypted on your device. Only ciphertext reaches storage. Keys never leave the USB drive.
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.
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.
Every file gets its own unique 256-bit encryption key. Key material is managed separately from your encrypted vault data.
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.
Why Necron
Plaintext is encrypted on your device before any cloud sync occurs.
Built on modern 256-bit symmetric cryptography chosen for strong long-term security. Post-quantum encryption explained →
We do not store your encryption keys on our servers. You control your key material.
How We Compare
| 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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