Lone Signal was a crowdfunded active SETI project designed to send interstellar messages from Earth to a possible extraterrestrial civilization.

Founded by businessman Pierre Fabre and supported by several entrepreneurs, Lone Signal was based at the Jamesburg Earth Station in Carmel, California.

[4] The Lone Signal team hoped to earn US$100 million to construct a network of satellite dishes across the Earth's surface, which could beam messages to many regions of the Milky Way galaxy.

The message is meant to be easily deciphered,[6] and uses operators and symbols from mathematics and logic to give coherent statements about the laws of physics and Earth's location in the galaxy.

[10][failed verification] Various commentators have identified several dangers with messaging extraterrestrial intelligence, which chief scientific officer Jacob Haqq-Misra covered in a 2013 paper before joining Lone Signal.