The Amazon-owned Wickr Me will go away for good on December 31st, 2023. By Emma Roth - November 19, 2022 Wickr: Our focus on end-to-end encrypted enterprise communications
Never heard of it. Website doesn't seem convincing. "Worlds most secure messenger" is in itself already a red flag, there don't seem to be any details on encryption and threat model on their website and it seems closed source. Plus the website itself still supports TLS 1.0..