Threema E2EE chat app to go 'fully open source' within months Threema follows in the footsteps of Signal and Wickr and opens its apps' codebase September 4, 2020 https://www.zdnet.com/article/threema-e2ee-chat-app-to-go-fully-open-source-within-months/ Threema: Threema Goes Open Source, Welcomes New Partner