Ambit Client vs QSphere VPN
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ambit Client
This VPN offers advanced security against future quantum computing threats by exclusively using CNSA 2.0 algorithms. It provides robust protection for sensitive business data, ensuring privacy and compliance in the evolving cyber landscape.
- Quantum-secure VPN
- CNSA 2.0 algorithms
- Post-quantum protection
- VPP networking technology
- Enterprise deployment
Read full descriptionHide full description
The Only Quantum-Secure VPN Your success relies on secure data, but quantum computing will break it wide open. You deserve to keep what you've earned; use Ambit Client to secure your success against quantum computing attacks. Ambit Client is available now for enterprise deployment. Organizations interested in protecting their data from current and quantum threats can contact sales@ambit.inc for more information. THE PROBLEM Quantum computing is rendering conventional security obsolete and it’s not just a problem when quantum computers arrive, it’s a problem now. Bad actors are harvesting your business data to decrypt later with a quantum computer (HNDL)... and when that happens, company executives could be held liable. You used to be able to protect data using a convention VPN, but quantum computing has changed that. Now you need a post-quantum VPN, and you need one that uses exclusively CNSA 2.0 algorithms. THE SOLUTION Everything you work so hard for is it risk. Only Ambit Client can protect your success because Ambit Client is the only VPN that uses exclusively CNSA 2.0 algorithms mathematically proven to protect against HNDL. Ambit Client is also as easy as or even easier to use than conventional VPNs. Ambit Client VPN makes use of a fast, innovative networking technology called Vector Packet Processing (VPP). THE QUANTUM SECURITY GAP Current VPN solutions leave organizations vulnerable by implementing quantum-resistant algorithms in only some of their cryptographic components. For true quantum resistance, all four key components must meet CNSA 2.0 standards: Authentication Key Exchange Bulk Encryption (AEAD) Hashing Ambit Client stands alone in using exclusively CNSA 2.0 algorithms across all four components, including the implementation of ML-KEM 1024 cryptography-mathematically proven to resist both conventional and quantum computer attacks. Organizations using traditional VPNs that rely on Diffie-Hellman Key Exchange, hybrid cryptography, or elliptic-curve cryptography remain exposed to HNDL attacks. These vulnerabilities could allow adversaries to decrypt sensitive data once quantum computers become capable enough—a milestone expected as early as 2030. “As I revealed in my Bloomberg documentary, The Massive Cyberattack You Never Heard About, the greatest cyber threats aren’t just coming—they’re already here. Quantum computing will soon shatter traditional encryption, leaving our most sensitive data exposed. That’s why investing in post-quantum solutions isn’t optional; it’s urgent. American Binary’s post-quantum VPN embodies the resilience, security, and innovation that define American Binary values—ensuring that our critical infrastructure remains protected against the next frontier of cyber warfare. The future belongs to those who secure it now.” — Jose Arrieta, former CIO of U.S Department of Health & Human Services (HHS) and CEO of Imagineer LLC. American Binary was also featured in Booz Allen Hamilton's "Top 10 Emerging Technology for DoD and National Security" 2024
QSphere VPN
Read full descriptionHide full description
QSphere VPN is a secure, enterprise-grade VPN client built for regulated and high-assurance environments. Designed for organizations with stringent cybersecurity and compliance requirements across finance, government, critical infrastructure, and other regulated sectors, QSphere VPN provides trusted remote access protected by post-quantum cryptography (PQC) and modern Zero Trust principles. QSphere VPN delivers secure connectivity while enforcing identity, device, and policy controls across your organization. Cryptographic operations, posture checks, and access decisions are handled automatically by your organization’s infrastructure, providing users with seamless access without complex configuration. Why QSphere VPN Built with post-quantum and cryptographic-agile protection, QSphere VPN safeguards sensitive corporate data against emerging and future threats and ensures organizations can adopt new standards as they emerge, without service disruption. The app works with your organization’s security and access policies to ensure every connection meets cryptographic requirements. Hardened, Defense-in-Depth Protocol QSphere VPN uses a hardened, enterprise-grade protocol engineered for high-assurance environments. It combines modern cryptography, post-quantum-safe algorithms, and multiple layers of validation to reduce attack surface, prevent traffic analysis, and safeguard sensitive corporate data. The protocol is optimized for both security and performance, ensuring reliable connectivity even under adversarial network conditions. Zero Trust Access Controls QSphere VPN supports modern Zero Trust principles, enabling organizations to implement: - Least-privilege access - Identity and device-aware session enforcement - Blocking of non-compliant or high-risk devices Together, these controls ensure that every session is cryptographically validated, policy-checked, and continuously assessed to ensure only trusted users and compliant devices maintain access. Centrally Managed and IT-Controlled QSphere VPN is not a consumer VPN and cannot be used independently. The app requires configuration from an organization’s IT administrator, ensuring that: - All security policies originate from the organization - End users cannot weaken or bypass enforced controls - Connections always meet corporate and regulatory requirements Designed for End Users: QSphere VPN app is intentionally simple. Users only interact with the minimum needed to connect, while the server manages permissions, cryptography, compliance checks, and access policies. Note for end users: QSphere VPN cannot be used as a standalone or personal VPN. QSphere VPN requires configuration from your organization.
Screenshots
Verdict
The clearest difference is update cadence: Ambit Client at every 3 weeks against QSphere VPN's every 3 months. Ambit Client also leads on iOS requirement (15.0 vs 18.5). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Ambit Client ships an update every 3 weeks, QSphere VPN every 3 months. The most recent releases landed on September 30, 2026 and October 12, 2026 respectively.
| Parameter | Ambit Client | QSphere VPN |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 7 — better | — |
| Update frequency | Every 3 weeks — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 18.5 |
| Further details — not scored | ||
| Size | 71 MB | 21 MB |
| Age rating | 4+ | 4+ |
| Developer | Ambit, Inc | QuantumGate |
In-app purchases
Ambit Client
No in-app purchases
QSphere VPN
No in-app purchases









