What are some alternatives?
When comparing Ethereum Gold and changelly, you can also consider the following products
Poloniex - US-based cryptocurrency exchange with maximum security
ShapeShift - Buy cryptocurrency instantly without the need of an account.
Nexchange - Nexchange - Instant, fast and easy to use crypto to crypto exchange.
CoinSwitch - First cryptocurrency and altcoin exchange aggregator.
Binance - Cryptocurrencies exchange platform
SimpleSwap.io - SimpleSwap is an instant cryptocurrency exchange without sign-up and upper-limits.