Hi @binarysneaker, welcome to the Supernotes Community!
Supernotes is currently not end-to-end encrypted (E2EE), however this is something we’d still like to offer in the future. Up until now our priority has been building out a great user experience that focuses on easy-of-sharing and portability between your devices – which is at somewhat at odds with E2EE.
Nevertheless, even without E2EE right now, we take your data privacy and security very seriously. Currently your data is always encrypted in transit (forced SSL) and encrypted at rest (AES-256). I hope that helps!