SLNT encrypts your messages and files on your device before they leave it. The server holds only ciphertext. Set a timer — when it expires, everything is gone. Permanently.
Your device encrypts everything before upload using ECDH + AES-GCM. The server never sees plaintext — not even SLNT.
Set messages to expire in 10 minutes, 1 hour, 24 hours, 7 days, or 30 days. When time runs out, the keys and blobs are permanently deleted.
Send PDFs, contracts, images — any file. Each is encrypted with its own key, which only the recipient can unlock.