The application uses distributed hash tables (DHT) to establish communications. This technology eliminates the use of centralized registers (servers) and the retention of personal data. Jami is based on a distributed network technology, eliminating the need for servers. Mass surveillance can not be undertaken by the servers as there is not any.
Jami stores your secrets (private keys for encryption and identity) only on the device which executes it, which belongs to you. Your device is therefore the sole holder of your information.