Betamax is a company, founed in 2005, which operates several Internet telephony services (also called VoIP-service) in Germany. Betamax uses a client software with proprietary protocol, but can also be accessed via SIP-protocol. Betamax features low call rates. Subscribers can mutually call for free, and call for free to fixed lines in selected countries worldwide (no money per minute and no start tariff) for a limited number of days after payments to Betamax