What are some alternatives?
When comparing ShapeShift and Shiftex, you can also consider the following products
changelly - Exchange alternative cryptocurrencies.
CoinSwitch - First cryptocurrency and altcoin exchange aggregator.
Switchain - Switchain is the easiest way to compare cryptocurrency prices.
Poloniex - US-based cryptocurrency exchange with maximum security
Flyp.me - Flyp.me the instant accountless exchange. No registration. Private & Secure.
Godex - All key features in one cryptocurrency exchange.