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Signal
Private messaging app with end-to-end encryption for chats and calls
Mountain View, US
Founded 2014
51-200 employees
About
Signal is a private messaging app run by the Signal Foundation, a US nonprofit. It launched in 2014, when earlier apps called TextSecure and RedPhone were combined. Moxie Marlinspike created it, and Brian Acton, a co-founder of WhatsApp, helped set up the foundation in 2018.
Every message, voice call and video call on Signal is end-to-end encrypted by default. The Signal Protocol it uses is also used by WhatsApp and by Google Messages for RCS chats. Signal stores as little data about its users as it can. Users can set messages to disappear after a set time, hide their phone number behind a username and lock the app with a PIN. Group chats, stories, voice notes and file sharing are all supported.
Signal is free and has no ads. It is funded by donations and grants. The code for its apps and servers is open source. Signal runs on iOS and Android, with desktop apps for Windows, Mac and Linux that link to the phone. Journalists, activists and privacy minded people across the US and Europe rely on it, and it is often recommended by security experts.
Every message, voice call and video call on Signal is end-to-end encrypted by default. The Signal Protocol it uses is also used by WhatsApp and by Google Messages for RCS chats. Signal stores as little data about its users as it can. Users can set messages to disappear after a set time, hide their phone number behind a username and lock the app with a PIN. Group chats, stories, voice notes and file sharing are all supported.
Signal is free and has no ads. It is funded by donations and grants. The code for its apps and servers is open source. Signal runs on iOS and Android, with desktop apps for Windows, Mac and Linux that link to the phone. Journalists, activists and privacy minded people across the US and Europe rely on it, and it is often recommended by security experts.
Contact Signal
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