Private communication
for organisations
CallSec
Private calls.
A safer tomorrow.
End-to-end encrypted calls, video and messages for teams that need privacy and control — as an app for Android and iPhone, on a hardened CallSec phone, or on a server of your own.
One platform, three ways to use it
Start with the app.
Go as far as your own server.
All three speak the same encrypted CallSec protocol: people on the app and on CallSec phones talk to each other, and with Legion your own servers can be connected too.
CallSec App
Encrypted calls and chat on the phones you already have
Android and iPhone from the stores; a desktop app for Windows and macOS on request. No phone number needed.
FeaturesCallSec OS
A phone that runs CallSec — and only what you allow
A phone with our hardened operating system, locked to our signing key and updated only from our servers.
The phoneCallSec On-premise
Your own CallSec server, in your hands
Run CallSec on your own hardware or virtual server, or on our hardened appliance — and connect sites with Legion.
Your serverBuilt for those
who demand privacy
Private by design,
managed by you.
Your administrator decides who joins, which devices are trusted and what happens to a lost phone. Conversations stay encrypted from one device to the other.
- Encrypted voice and video calls
- Encrypted messaging, files and location
- Spaces, policies and remote wipe for admins
- Warnings about a compromised phone
What is inside
Security you do not have to think about
End-to-end encryption
Messages and calls are encrypted on the device, and only the devices in the conversation can decrypt them. Connections to the server are encrypted with TLS.
No phone number
Accounts are not tied to a phone number or SIM card, so your number is not shared with contacts.
Disappearing messages
Messages can delete themselves after a set time, counted from sending or — in one-to-one chats — from reading.
Remote wipe and panic PIN
An administrator can wipe a lost device. A panic PIN or pattern, entered on the CallSec lock screen, wipes the app's data.
Calls through a relay
By default, calls are routed through our relay, so the other side does not learn your IP address.
Devices you approve
New devices join by QR code and are approved from a device you already use; any device can be removed remotely.
More than communication
Hardened by design.
Trusted by purpose.
CallSec is developed in Slovenia by C-AT-H d.o.o. We work with organisations directly: we set up your space, your devices and, if you want, your own server.
Your
conversations
belong to you