Self-destruct-o is like One-Time Secret on steroids, while read-once doesn’t even try to protect the message or password it uses.
PrismCipher does not store protected data on servers like self-destruct-o or One-Time Secret, neither does it transmit passwords in the clear like read-once does. Services such as One-Time Secret are good for creating protected data shares and, once protected, allowing the user to choose how to send the secret link to the intended recipient.
On the other hand, PrismCipher is useful for seamlessly transmitting data through existing services like Yahoo! Mail or Gmail. Once you encrypt, you can see exactly what you’re sending prior to transmission.