Although Ethereum has one of the largest cryptocurrency market caps, it’s still fairly new. Not all exchanges support direct purchases of ether. In most cases buying bitcoins and trading for ether is the easiest way to get ether.
With that said, there are still a few exchanges where you can buy ether without bitcoin:
Atomic Wallet is a popular multicurrency wallet supporting over 300 coins and tokens. The wallet allows you to buy Bitcoin, Ethereum, XRP (Ripple), Litecoin and Bitcoin Cash right in one interface. It’s remarkable that the wallet provides all-in-one solution for every cryptocurrency holder. Atomic Wallet is non-custodial which means that all users’ private keys are encrypted on their devices and can be used anytime. Atomic Wallet has built-in services allowing you to exchange and buy Bitcoin and other cryptos with a credit card in one interface. The wallet also features the option to use Atomic Swaps, the on-chain technology, for swapping for Bitcoin
Kraken is a Bitcoin and cryptocurrency exchange based in Europe. Kraken offers six ether trading pairs: ETH/XBT, ETH/USD, ETH/EUR, ETH/CAD, ETH/JPY, and ETH/GBP. Because Kraken offers a wide range of payment methods–SEPA transfer, USD bank wire, GBP SEPA, Interac Online–it is the easiest way for most people to buy ether directly.
Coinbase is one of the world's largest Bitcoin and Ether exchanges. Users in the United States, Canada, most of Europe, and Singapore can buy bitcoins with a connected bank account or SEPA transfer. European users can purchase bitcoins with 3D secure credit or debit cards.
Buy ether in Europe with credit card, debit card NETELLER, Skrill, GIROPAY, SEPA, or OBT.
Buy ether in Europe with a SEPA transfer.
Buy ether with GBP or Euros.
Bitrush is an exchange for Bitcoin, Litecoin and Ethereum in Belgium and the Netherlands.
Trading Bitcoins for Ether
If using Kraken isn’t an option, the second easiest way to get ether is to exchange bitcoins for ether. Many Bitcoin exchanges offer this trading pair:
ETH/XBT is one of Kraken’s six ETH trading pairs.
Poloniex is an altcoin exchange and has the highest ETH/BTC volume.
Convert bitcoins to ether in less than a minute.
Completing your Purchase
Once your purchase has been made, send your ether to a wallet you control:
Ethereum Wallet - Desktop Ethereum wallet for Mac, Windows, and Linux.
Buy Ether with PayPal
Although not recommended, it’s possible to buy ether with PayPal. First you must buy SLL on VirWox, then trade SLL for bitcoin. Once you have BTC you can use any of the methods above to trade bitcoin for ether.
Buy Ether with Credit Card or Debit Card
There is still no easy way to buy Ether directly with a credit card. The best way is to use an exchange like Circle (US) or CoinCorner (UK & Europe) to buy bitcoins which you can trade for ether.
One of the options to buy Ethereum with credit card is Atomic Wallet (US and Europe). The in-app buy option is powered by Simplex that allows to buy Bitcoin, Ethereum, Litecoin, XRP (Ripple) and Bitcoin Cash with a credit card in a few clicks. The whole process takes several minutes, daily limit is up to $20,000.