I wonder what is the salary of the executives.

Wonder no more, they have it in their 2022 tax filing:

Compensation

Key Employees and Officers Base Related Other

Jim O’leary (Vp, Engineering) $666,909 $0 $33,343

Ehren Kret (Chief Technology Officer) $665,909 $0 $8,557

Aruna Harder (Chief Operating Officer) $444,606 $0 $20,500

Graeme Connell (Software Developer) $444,606 $0 $35,208

Greyson Parrelli (Software Developer) $422,972 $0 $35,668

Jonathan Chambers (Software Developer) $420,595 $0 $28,346

Meredith Whittaker (Director / Pres Of Signal Messenger) $191,229 $0 $6,032

Moxie Marlinspike (Dir / Ceo Of Sig Msgr Through 2/2022) $80,567 $0 $1,104

Brian Acton (Pres/Sec/Tr/Ceo Sig Msgr As Of 2/2022) $0 $0 $0

from https://projects.propublica.org/nonprofits/organizations/824506840