KvantPhone
Secure calling and messaging
Free · In‑App Purchases
Secure Communication Service
KvantPhone is a fully secure, quantum-resistant WhatsApp alternative designed for secure corporate and government communication, offering end-to-end encrypted voice, video, messaging and group communication.
KvantPhone combines encrypted calls, conferencing, messaging, group communication and file sharing in one secure platform. KvantPhone and its white-labelled and on-site versions are used in 100+ countries.
KEY FEATURES
• Quantum-safe encrypted communication for mission-critical use cases
• Secure and encrypted voice and video calling and conferencing
• Secure individual and group messaging
• Encrypted file sending in all major formats (PDF, Word, PPT, etc.)
• Security does not affect usability & user experience
• No ads, no trackers, no data collection
• Available from the cloud or deployed on-site
• Comprehensive management features and admin interface built for large organizations
• No backdoors of any kind – guaranteed with regular reviews and audits
DESIGNED WITH SECURITY AT ITS CORE
KvantPhone uses an end-to-end encryption architecture and advanced quantum-safe cryptographic technologies to protect sensitive communications.
Voice, video and messaging communications are protected between user devices. The architecture is designed to prevent unauthorized third parties from accessing private communications and to minimize reliance on centralized infrastructure for protecting sensitive communication data.
Our security mechanisms and applied post-quantum cryptographic technologies continue to evolve to address both current and emerging security requirements.
SECURE VOICE, VIDEO AND GROUP COMMUNICATION
Encrypted voice/video calls, multi-participant conferencing and messaging operate within the same secure environment, with group communication designed for larger groups and longer conversations while maintaining confidentiality.
BUILT FOR CORPORATE AND GOVERNMENT COMMUNICATION
For companies, public-sector organizations and other security-conscious environments where privacy, confidentiality and control are essential, KvantPhone unifies secure everyday communication without separate calling, conferencing and messaging apps.
FLEXIBLE DEPLOYMENT, INCLUDING ON-SITE & ISOLATED ENVIRONMENTS
KvantPhone can be rapidly deployed across organizations of different sizes and structures. The service can be accessed as a hosted cloud service or deployed on-site in your own data centers or secure facilities.
This supports data sovereignty, regulatory requirements and internal security policies.
COMPLIANCE, AUDITABILITY AND GOVERNANCE
Beyond encryption, public-sector organizations might need governance and accountability features. KvantPhone supports:
• Clear role-based access control and user management
• Policy-driven configuration aligned with internal security rules
We combine an EU vendor background with a transparent security philosophy and continuous auditing, supporting organizations operating under export-control, national-security or data-protection constraints.
FURTHER SPECIAL FEATURES
• Secure backup and restore of messages and call history – accessible only by the user
• “Connect with code”: connect with partners without revealing user data, e.g. e-mail or user ID
• Secure central admin interface for organizations, users, licenses, contact lists and user visibility
• Remote wipe and revocation of user access
• SSO, SoC and SIEM integration and advanced logging for secure operations
• System customization and white-labelling options
KvantPhone is continuously developed to deliver faster, more stable and more secure communication for organizations where privacy and information security matter.
Use cases – Businesses:
https://kvantphone.com/markets-and-case-studies/
Use cases – Defense & Gov:
https://kvantphone.com/government-and-defense-case-studies/
Terms of Use:
https://www.kvantphone.com/terms_and_conditions
Privacy Policy:
https://www.kvantphone.com/privacy_policy
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
⊖ Improvements
* General performance improvements
* Improved message group handling
* Improved notification handling
* Improved notification sound handling
* Improved call handling
* Improved camera handling
* Improved backup and restore handling
The developer, Arenim Infosec Kft., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Arenim Infosec Kft.
- Size
- 108.9 MB
- Category
- Business
- Compatibility
Requires iOS 16.0 or later.
- iPhone
Requires iOS 16.0 or later. - iPad
Requires iPadOS 16.0 or later.
- iPhone
- Languages
English and 6 more
- English, French, Hungarian, Japanese, Korean, Portuguese, Simplified Chinese
- Age Rating
4+
- 4+
- Contains
Messaging and Chat
- In-App Purchases
Yes
- Ultimate $3.99
- 250 extra credit $0.99
- Basic $2.99
- Copyright
- © 2026 Arenim Infosec Kft.