# QCS Post-Quantum Secure Backup (.qtm) vs QuSecure QuProtect R3: side-by-side comparison (2026)

[QCS Post-Quantum Secure Backup (.qtm)](https://cybersectools.com/tools/qcs-post-quantum-secure-backup-qtm) is a commercial [post-quantum cryptography](https://cybersectools.com/categories/post-quantum-cryptography) solution by [QCS (Quantum Computing Solutions)](https://cybersectools.com/companies/qcs-quantum-computing-solutions). [QuSecure QuProtect R3](https://cybersectools.com/tools/qusecure-quprotect-r3) is a commercial [cryptographic inventory & crypto-agility](https://cybersectools.com/categories/crypto-inventory-agility) solution by [QuSecure](https://cybersectools.com/companies/qusecure). Features, integrations, deployment and the company behind each one, side by side.

## Our take

What our shortlists say about the one we picked.

### [QuSecure QuProtect R3](https://cybersectools.com/tools/qusecure-quprotect-r3)

Best for: Teams adding quantum-safe protection without code changes

QuProtect R3 earns its place because it fixes at the network layer, so you can add quantum-safe key exchange without changing code or taking systems down. That suits mid-market and enterprise teams with legacy systems they cannot rewrite soon, and hybrid ML-KEM keeps classical clients working. Ask how it handles cryptography that lives inside your applications, because a network fix does not reach that.

From [Best Post-Quantum Cryptography Solutions for Business](https://cybersectools.com/shortlists/best-post-quantum-cryptography-solutions), Fall 2026.

Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about).

Need the answer fast? [Best Post-Quantum Cryptography Solutions for Business](https://cybersectools.com/shortlists/best-post-quantum-cryptography-solutions) picks SandboxAQ AQtive Guard, QuSecure QuProtect R3, Venari Adaptive Cryptographic Intelligence Platform and 4 more.

## Side-by-side comparison

| | QCS Post-Quantum Secure Backup (.qtm) | QuSecure QuProtect R3 |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Post-Quantum Cryptography | Cryptographic Inventory & Crypto-Agility |
| Verified | No | No |
| Deployment type | On-Premises | Hybrid |
| Company size fit | Mid-Market, Enterprise | Mid-Market, Enterprise |
| Company | QCS (Quantum Computing Solutions) | QuSecure |
| Headquarters | – | – |

### Use cases and capabilities

| | QCS Post-Quantum Secure Backup (.qtm) | QuSecure QuProtect R3 |
|---|---|---|
| Quantum Safe | Yes | Yes |
| Encryption | Yes | Yes |
| Data Breach | Yes | – |
| GDPR | Yes | Yes |
| Critical Infrastructure | Yes | Yes |
| Healthcare | Yes | – |
| Documentation | Yes | – |
| Security Architecture | Yes | – |
| Crypto | – | Yes |
| NIST | – | Yes |
| Key Management | – | Yes |
| Inventory | – | Yes |
| Security Reporting | – | Yes |

### Core features

**QCS Post-Quantum Secure Backup (.qtm)**

8 features listed. Sign in on the page to see them.

**QuSecure QuProtect R3**

10 features listed. Sign in on the page to see them.

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [QCS Post-Quantum Secure Backup (.qtm)](https://cybersectools.com/tools/qcs-post-quantum-secure-backup-qtm) fits if you need to run it on your own servers.
- [QuSecure QuProtect R3](https://cybersectools.com/tools/qusecure-quprotect-r3) fits if you need both cloud and on-premises options.

## QCS Post-Quantum Secure Backup (.qtm) vs QuSecure QuProtect R3 FAQ

Common questions when comparing QCS Post-Quantum Secure Backup (.qtm) vs QuSecure QuProtect R3 for post-quantum cryptography.

### What is the difference between QCS Post-Quantum Secure Backup (.qtm) and QuSecure QuProtect R3?

**QCS Post-Quantum Secure Backup (.qtm)**: Post-quantum file archive format (.qtm) using Kyber/Dilithium for verifiable, offline. Built by QCS (Quantum Computing Solutions).

**QuSecure QuProtect R3**: PQC platform for crypto asset discovery, remediation, and compliance reporting. Built by QuSecure.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes QCS Post-Quantum Secure Backup (.qtm) and QuSecure QuProtect R3?

**QCS Post-Quantum Secure Backup (.qtm)** is made by QCS (Quantum Computing Solutions). **QuSecure QuProtect R3** is made by QuSecure. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is QCS Post-Quantum Secure Backup (.qtm) a good alternative to QuSecure QuProtect R3?

In part. QCS Post-Quantum Secure Backup (.qtm) and QuSecure QuProtect R3 are not in the same category on CybersecTools. Both cover Quantum Safe, Encryption, GDPR. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [QCS Post-Quantum Secure Backup (.qtm) vs PQShield UltraPQ-Suite](https://cybersectools.com/compare/pqshield-vs-qcs-post-quantum-secure-backup-qtm)
- [QCS Post-Quantum Secure Backup (.qtm) vs CypherShield](https://cybersectools.com/compare/cyphershield-vs-qcs-post-quantum-secure-backup-qtm)
- [QCS Post-Quantum Secure Backup (.qtm) vs Mumken PQC Platform](https://cybersectools.com/compare/mumken-pqc-platform-vs-qcs-post-quantum-secure-backup-qtm)
- [QuSecure QuProtect R3 vs PQShield UltraPQ-Suite](https://cybersectools.com/compare/pqshield-vs-qusecure-quprotect-r3)
- [QuSecure QuProtect R3 vs CypherShield](https://cybersectools.com/compare/cyphershield-vs-qusecure-quprotect-r3)
- [QuSecure QuProtect R3 vs Mumken PQC Platform](https://cybersectools.com/compare/mumken-pqc-platform-vs-qusecure-quprotect-r3)

## Alternatives to each

- [See all QCS Post-Quantum Secure Backup (.qtm) alternatives](https://cybersectools.com/alternatives/qcs-post-quantum-secure-backup-qtm)
- [See all QuSecure QuProtect R3 alternatives](https://cybersectools.com/alternatives/qusecure-quprotect-r3)

---

Source: https://cybersectools.com/compare/qcs-post-quantum-secure-backup-qtm-vs-qusecure-quprotect-r3

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/qcs-post-quantum-secure-backup-qtm.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on QCS Post-Quantum Secure Backup (.qtm) and QuSecure QuProtect R3: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md