You are going to find the list of reputable and solid Ethereum Exchange companies in this page below. Since Ethereum grows extremely fast, it's remarkably important to use trustable and reputable exchanges only.
List is frequently updated and renewed.
International Ethereum Exchange
Probably the biggest Bitcoin broker in USA, Canada and most parts of Europe. Payment options depend on location - Coinbase accepts Credit Cards, Bank Transfers, SEPA, either allows to connect bank account.
Changelly started in 2013 and served more than 100,000 customers. Located in Prague, Czech Republic, Changelly accepts huge number of cryptocurrencies. It's a decent place to buy Ether with bank cards also.
It's Canadian based Bitcoin, Litecoin and Ethereum exchange and trading platform in one place. Provides its services globally (excl. USA). QuadrigaCX is trusted and reliable. The level of security is impressive as well.
USA & Canada Ethereum Exchange
Gemini provides quality services for its customers since the early beginning of Bitcoin. Superb trading platform is one of the best in the market available right now. In addition, it offers lovely fees and accepts residents of New York state.
Europe Ethereum Exchange
The company is based in Austria and provides European residents with quality services. BitPanda accepts Credit Cards, SEPA, Neteller and much more. In addition BitPanda To Go was introduced and it's available at Post Office branches all over Austria. Guarantees great privacy and security by always encrypting all the data.
Settled in France Coinhouse, provides customers with instant cryptocurrency delivery after payment is received. Customer must go through verification procedure firstly though. While prices are taken from Kraken, Coinhouse gives the honest Bitcoin Exchange Rate.
BitBay foundation date reaches 2014, Poland. It's not one of top-notch players, but really worth trying. International customers are welcome, but full features are available for residents of Europe countries, most of all - Poland. As a result - BitBay is in this list.
Since its start in 2013 (in Netherlands), LiteBit managed to offer many cryptocurrencies. Many payment methods available - Sofort, SEPA, iDEAL, etc as well. It is very nice place to purchase Ethereum and Bitcoin alike.
Australia Ethereum Exchange
CoinSpot is Australia based cryptocurrency exchange. It offers not to buy or sell Ethereum only, but many other cryptos as well. With easy to use website and low fees, it is a good place for acquiring altcoins.