Poloniex launched in 2014. It is based in the United States. It was recently acquired by Circle, a large Goldman-Sachs backed company. The exchange faced a hacker attack soon after opening which caused a higher level of security provided later. It requires a user’s physical address, postal address, date of birth, id, and phone number.
Chimere is a crypto swap and a non-custodian exchange that allows beginner/intermediate/advanced users to swap crypto-to-crypto easily, fast, and secure. Chimere welcomes and swaps your cryptocurrencies, dictated by the blockchain book before letting them navigate along the chain which restores them to his master.
FreiExchange was founded in 2016 in Norway by a team of local enthusiasts aiming to support Freicoin, an old crypto, that is also called “Bitcoin with demurrage”. The trading volume on this platform is rather moderate. As of now, it offers 31 cryptocurrency pairs with Bitcoin as a counter currency.