Wikipedia
Alterkeys
Alterkeys is an online marketplace where accommodation in Europe can be listed and booked for short term lettings. Based on the peer-to-peer property rental model, the platform allows individuals and property managers to list their unoccupied accommodation space and connect with travellers looking for short term accommodation to rent. By June 2013, over 50,000 properties across Europe were listed on the platform. The accommodation options listed on Alterkeys include apartments, castles and villas. In June 2014, the company reached 100,000 properties all around Europe.