Pricing

One-time purchase. Lifetime license. No subscriptions. No recurring fees. Pay once, use forever.

Free
qnsqy
$0
Forever free. No account required.
  • Hybrid ML-KEM-768 + X25519
  • AES-256-GCM encryption
  • Argon2id (128 MB, 3 iterations)
  • BLAKE3 integrity verification
  • 1 GB maximum file size
  • Encrypt / Decrypt / Shred commands
  • Compression (zstd)
  • GUI + CLI included
  • All platforms (Windows, macOS, Linux)
Download Free
RECOMMENDED
Pro
qnsqy
$49
One-time payment. Lifetime license.
  • Everything in Free, plus:
  • ML-KEM-1024 option (NIST Level 5)
  • SLH-DSA hash-based signatures (FIPS 205)
  • Argon2id (256 MB, 4 iterations)
  • 10 GB maximum file size
  • Batch operations
  • Append-only audit logging
  • Commercial use license
Enterprise
qnsqy
$199
Per user. Volume discounts for 10+ seats.
  • Everything in Pro, plus:
  • Hybrid KEM (ML-KEM-1024 + X25519)
  • Hybrid signatures (ML-DSA + Ed25519)
  • Argon2id (512 MB, 6 iterations, customizable)
  • Unlimited file size
  • Password change (rekey)
  • Full algorithm selection
  • Hash chain audit log
  • Priority support (24h response)
Request Volume Quote

Migration Service

Already using classical encryption? We offer migration-as-a-service to help organizations transition from traditional cryptography to post-quantum cryptography safely and efficiently.

Our team will assess your current encryption infrastructure, plan the migration path, and ensure zero data loss during the transition.

Contact Sales for Migration

Complete Feature Comparison

Feature Free Pro Enterprise
Core Encryption
Encrypt & Decrypt
Compression (zstd)
Secure file deletion
GUI + CLI
Air-gapped (no network)
Algorithms
AES-256-GCM
XChaCha20-Poly1305
Hybrid KEM (ML-KEM + X25519) ML-KEM-768 + X25519 ML-KEM-768/1024 + X25519 ML-KEM-768/1024 + X25519
SLH-DSA hash-based signatures (FIPS 205)
Hybrid signatures (ML-DSA + Ed25519)
Password strength (Argon2id) 128 MB, 3 iter 256 MB, 4 iter 512 MB, 6 iter
Integrity verification BLAKE3 BLAKE3 BLAKE3 + Merkle
Capabilities
Maximum file size 1 GB 10 GB Unlimited
Batch operations
Memory protection
Brute-force protection
Audit logging Append-only Hash chain
Password change (rekey)
Custom security parameters
Algorithm selection AES/XChaCha AES/XChaCha + all ML-KEM Full control + custom Argon2
Support & License
Personal use
Commercial use
Email support 48h response 24h response

Pricing Questions

Yes. Pay once, use forever. No subscriptions, no recurring fees, no "maintenance" charges. You receive lifetime access to the version you purchased, plus all updates within your major version.
Credit cards (Visa, Mastercard, American Express), PayPal, and bank transfers for Enterprise purchases. All payments are processed securely.
Yes. 30-day money-back guarantee for Pro licenses. If QNSQY doesn't meet your needs, contact us within 30 days for a full refund. No questions asked.
Absolutely. Purchase Pro whenever you're ready. Your existing encrypted files will continue to work — the file format is the same across all tiers. You'll just gain access to additional features.
Contact us for volume pricing. Discounts are available for 10+ seats, with additional savings at higher volumes. We also offer site licenses for unlimited users within an organization.
The Free tier serves as your trial. It uses the same encryption engine as Pro and Enterprise — you're testing the real product, not a limited demo. When you need Pro features, upgrade.

Enterprise Solutions

Need to deploy QNSQY across your organization? We offer volume licensing, custom security policies, key escrow for business continuity, and priority support.

Contact our enterprise team to discuss your requirements:

enterprise@quantumsequrity.com

Start protecting your files today

The Free tier includes full quantum-safe encryption. Upgrade when you need Pro features.

Download Free Compare Features