Teckel provides a simple, highly secure, fully anonymous, text-based messaging service called "teckel talk", which requires only an Ethereum address for authentication. There is no limit to the number of Ethereum addresses that can be created or imported. Teckel talk does not require a phone number or email address, and does not record IP addresses of users. Chat sessions are completely ephemeral, no data is stored on the device or on any servers. Messages are encrypted in transit via SSL. Two-way chats are end-to-end encrypted using the Diffie-Hellman algorithm. Optionally, group chats of three or more participants can be end-to-end encrypted using pre-agreed ephemeral passwords (shared between users offline). General public messaging is free. Private group messaging is available through the payment of teckel credits available via In App purchase. Teckel credits can also be used to access teckel APIs aimed at developers. Currently available APIs include json-rpc Ethereum node services. API key management is authenticated via Ethereum addresses within the app.