Wikipedia
Jajah was a VoIP ( Voice over IP) provider, founded by Austrians Roman Scharf and Daniel Mattes in 2005. The Jajah headquarters are located in Mountain View, CA, USA, and Luxembourg. Jajah maintained a development centre in Israel. On 23 December 2009, it was announced that Jajah had been bought by Telefónica through its subsidiary Telefónica Europe. In December 2013, Telefónica announced that Jajah would shut down at the end of January 2014.Telefonica to Shut Down VoIP provider Jajah on January 31, 2014
Jajah's primary service, Jajah Web, took an approach called web-activated telephony, using VoIP to connect traditional phones (landline or mobile). Calls were made without download or user-installed software, and in most cases at rates lower than those of traditional phone companies or even free of charge.
The company’s competitors included Ribbit and IntelePeer.