Blip – Ephemeral chat that stores nothing, anywhere. open source

Client-side auto-shred plus E2E using Curve25519 + XSalsa20-Poly1305 and a server-as-relay model is a tidy, pragmatic approach to disposable chat; the README even calls out blob-releasing and visibility/shortcut hooks for capture protection. That capture-guard idea is clever in practice but inherently limited (you can't stop a phone snapshot or an external recorder), so the project reads as a useful, honest implementation rather than a revolutionary privacy panacea.