Privacy, Security & Calling
Expert insights on private calling, WebRTC technology, zero-log architecture, and keeping your digital identity safe.
Why Phone Numbers Are a Privacy Threat in Modern Calling Apps
Almost every major communication app—from WhatsApp to Telegram—demands your mobile phone number. Here is why this setup is a massive security vulnerability, and how custom UserIDs fix it.
WebRTC & P2P Technology: How CallzUp Keeps Your Calls Private
Most calling apps route your voice through central servers that can be logged, tapped, or hacked. CallzUp uses WebRTC peer-to-peer technology to send audio and video directly between devices — with zero server storage.
CallzUp vs WhatsApp vs Signal: A True Privacy Comparison
Which calling app actually protects your privacy? We compare CallzUp, WhatsApp, and Signal across 8 key privacy metrics — phone number requirements, data retention, encryption, and more.
Zero-Log Architecture: How CallzUp Stores Nothing About Your Calls
CallzUp's zero-log architecture means that the moment your call ends, every trace of it disappears permanently from our servers. Here's a technical deep-dive into exactly how this works.