Reiknistofa bankanna (RB) is an IT service provider for Icelandic financial institutions. RB has developed the clearing and settlement system in Iceland and also a number of core banking solutions which are multi-tenant solutions used by most of the Icelandic banks. RB also operates an e-invoicing and e-payment system for corporates and consumers. RB is jointly owned by the three main Icelandic banks, two saving banks, the Icelandic Savings Bank Association and the three main payment card processors in Iceland. RBs clients are these banks, the Central Bank of Iceland and other financial institutions as well as the government and public entities.