What is Signal?

Answer

About Signal

Signal is speak freely.

Speak freely. Signal is a free, open-source encrypted messaging app run by a non-profit, with a focus on privacy and security.

Source

This answer is drawn from the Signal listing on Startup Spotlight, last updated May 20, 2026. For the full profile, see the Signal listing.

Other questions about Signal

• Who founded Signal?

  Signal was founded by Moxie Marlinspike.

• When was Signal launched?

  Signal launched in 2018.