Codebase is small and easy to audit. The panic button wipes all chat history in a room and blocks future messages. OnionShare fully depends on Tor’s built-in encryption for message security while NanoChat has its own encryption, which means you can host it on different anonymity networks.

There are no user identities (not even cryptographic ones), and room encryption key is stored in URL which is never sent to server. Anyone can choose any nickname and you can access official instance (https://nanochat.anarchists.space/) through Tor.