Signal - Open-source, end-to-end encrypted app with no metadata collection; trusted by privacy advocates..Threema - Swiss-made app requiring no phone number; offers anonymous, secure communication..Session - Decentralized messenger using blockchain; no phone number or metadata required..SimpleX - No user IDs; connects via QR codes or links; ensures private, decentralized chats..Olvid - French app with no central directory; collects zero personal data; highly secure..Read More Stories .Join our WhatsApp Channel to get the latest news, exclusives and videos on WhatsApp