Group chats and channels allow users to create and join conversations. File sharing enables sending and downloading documents. Messaging includes text, images, and voice notes. Video and audio calls support real-time communication.
Email service with end-to-end encryption using RSA 4096-bit keys. Automatically signs and encrypts emails. Send encrypted messages to any email address. Receive encrypted emails from users or normal addresses.
Si4Key provides local encryption for keystrokes, ensuring input stays on the device. It includes one-tap digital signature for secure authentication. Offers offline key management for secure identity verification without internet dependency.