Bittrex is one of the largest crypto to crypto exchanges. It offers a large number of trading pairs, but do not allow fiat to crypto trading. Bittrex has one of the largest trading volumes in the market.
It is a reputable exchange with good record on security and is also fully regulated. They provide two factor authentication as well as a number of other options to secure funds. They are United States based and are fully compliant with all laws.
They support more than 190 cryptocurrencies and have a dynamic platform. It’s a good option for both advanced and beginner traders; providing advanced tools like candlestick charts and crosshairs, but with a user-friendly interface that is very intuitive.
Trading Fees: 0.25%

United Traders is a Russian-based software company that is developing an investment marketplace and crytpocurrency exchange. Their Aurora platform allows traders to access some of the largest traditional asset exchanges. The UTExchange will offer smart-route technology to address liquidity problems that face cryptocurrencies with smaller trading volumes.