# QCS Post-Quantum Secure Backup (.qtm) vs VaultysID-Q: 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). [VaultysID-Q](https://cybersectools.com/tools/vaultysid-q) is a commercial [post-quantum cryptography](https://cybersectools.com/categories/post-quantum-cryptography) solution by [Vaultys](https://cybersectools.com/companies/vaultys). Features, integrations, deployment and the company behind each one, side by side.

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) | VaultysID-Q |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | Post-Quantum Cryptography | Post-Quantum Cryptography |
| Verified | No | No |
| Deployment type | On-Premises | Hybrid |
| Company size fit | Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | QCS (Quantum Computing Solutions) | Vaultys |
| Headquarters | – | – |

### Use cases and capabilities

| | QCS Post-Quantum Secure Backup (.qtm) | VaultysID-Q |
|---|---|---|
| Quantum Safe | Yes | Yes |
| Encryption | Yes | – |
| Data Breach | Yes | – |
| GDPR | Yes | – |
| Critical Infrastructure | Yes | – |
| Healthcare | Yes | – |
| Documentation | Yes | – |
| Security Architecture | Yes | – |
| Authentication | – | Yes |
| Open Source | – | Yes |

### Core features

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

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

**VaultysID-Q**

8 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.
- [VaultysID-Q](https://cybersectools.com/tools/vaultysid-q) fits if you need both cloud and on-premises options and you are a small business.

## QCS Post-Quantum Secure Backup (.qtm) vs VaultysID-Q FAQ

Common questions when comparing QCS Post-Quantum Secure Backup (.qtm) vs VaultysID-Q for post-quantum cryptography.

### What is the difference between QCS Post-Quantum Secure Backup (.qtm) and VaultysID-Q?

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

**VaultysID-Q**: Post-quantum cryptographic authentication solution with passwordless access. Built by Vaultys.

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

### Who makes QCS Post-Quantum Secure Backup (.qtm) and VaultysID-Q?

**QCS Post-Quantum Secure Backup (.qtm)** is made by QCS (Quantum Computing Solutions). **VaultysID-Q** is made by Vaultys. 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 VaultysID-Q?

Often, yes. QCS Post-Quantum Secure Backup (.qtm) and VaultysID-Q are both Post-Quantum Cryptography products, and both cover Quantum Safe. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [QCS Post-Quantum Secure Backup (.qtm) vs Mumken PQC Platform](https://cybersectools.com/compare/mumken-pqc-platform-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 SylLab Systems](https://cybersectools.com/compare/qcs-post-quantum-secure-backup-qtm-vs-syllab-systems)
- [VaultysID-Q vs Mumken PQC Platform](https://cybersectools.com/compare/mumken-pqc-platform-vs-vaultysid-q)
- [VaultysID-Q vs CypherShield](https://cybersectools.com/compare/cyphershield-vs-vaultysid-q)
- [VaultysID-Q vs SylLab Systems](https://cybersectools.com/compare/syllab-systems-vs-vaultysid-q)

## Alternatives to each

- [See all QCS Post-Quantum Secure Backup (.qtm) alternatives](https://cybersectools.com/alternatives/qcs-post-quantum-secure-backup-qtm)
- [See all VaultysID-Q alternatives](https://cybersectools.com/alternatives/vaultysid-q)

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Source: https://cybersectools.com/compare/qcs-post-quantum-secure-backup-qtm-vs-vaultysid-q

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 VaultysID-Q: 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