CallSec vs Obliv

Description: CallSec is a security-first communications platform for encrypted messaging, voice and video calls. MILITARY-GRADE ENCRYPTION End-to-end encryption, built on an audited open-source cryptographic core, ensures only you and your recipients can read messages or hear calls. Not even the server can access your content. SECURE VOICE & VIDEO CALLS Crystal-clear encrypted calls with TURN relay mode that prevents IP address leaks. Multi-device support — receive calls on all your devices simultaneously. ADVANCED DEVICE SECURITY • Root/jailbreak detection • IMSI catcher detection with cell tower database • Screenshot and screen recording prevention • Microphone spy detection during calls • Overlay attack protection PRIVACY CONTROLS • PIN, pattern, or biometric app lock • Panic PIN — triggers emergency data wipe under duress • Dead Man's Switch — auto-wipe if you don't authenticate within set days • Disappearing messages • Incognito keyboard and clipboard auto-clear • Secure notifications SELF-HOSTED & ON-PREMISES Deploy on your own infrastructure for complete data sovereignty. True on-premises deployment with federation support between organizations. MULTI-DEVICE Use CallSec on multiple devices with the same account. Device approval workflow ensures only authorized devices can access your communications. CallSec is designed for organizations and individuals who require the highest level of communication security.

Obliv is a messenger for people who want their conversations to actually disappear. No phone number. No email. No backups. No recovery. Just a six-digit PIN you memorise, and messages that vanish from our servers the moment your device acknowledges them. End-to-end encrypted on your device before anything leaves it. The server is zero-knowledge — it cannot read, index, or recover what you send. Features • Text, photo, video, voice notes, and files • Encrypted audio and video calls with native iOS call integration • Private group chats with automatic key rotation when membership changes • Contact exchange by QR code or short ID — no directory, no lookups, no phone book • Panic wipe after repeated wrong PIN attempts. No recovery. No exceptions. • Screenshot and screen-recording protection on sensitive screens • No analytics. No crash reporting. No advertising. No third-party tracking. • PIN-only unlock. No biometrics. No device-key storage. Threat model Obliv is designed for people who expect their devices to be seized, inspected, or lost. Your identity lives on-device, encrypted with a key derived from your PIN using a slow, brute-force-resistant function. Biometrics are deliberately unsupported — no one can unlock Obliv by holding your phone up to your face. If you forget your PIN, the identity is gone. This is the point. What we store On our servers: public keys so peers can find you, transient encrypted envelopes that are deleted the moment your device acknowledges them, and opaque push tokens for wake-up notifications. Nothing else. No message content, no contact lists, no conversation history, no behavioural data. Limitations Obliv is intentionally single-device. Multi-device support widens the attack surface and is not supported. If you reset your phone or reinstall Obliv, you start over. Obliv is independent. Not affiliated with Signal, Telegram, WhatsApp, or any other messenger.