Crex24 is a multicurrency exchange despite being relatively new. It supports many cryptocurrencies, even the most popular ones. It also support flat Currencies It was founded in 2017 and located in Estonia.
It is highly adopted among Russian citizens and nearby countries but it is not opened to US, UK, Canada and Isreal citizens and residents. This could be as a result of high government regulations or their lack of KYC usage.
Crex24 charges different trading fee from makers and takers. It accepts a withdrawal fee of 0.001BTC which is a little above the industry standard. It is good to know that it accept wire transfer and credit card for deposit.
For security, it uses two factor authentication. it also provides regular updates via Twitter for it's user.