Assuming you are asking for an alternative to Coinbase as a digital currency exchange:
A popular alternative to Coinbase is Kraken. Founded in 2011, Kraken is a cryptocurrency spot and derivatives exchange, as well as one of the largest fiat exchanges in Europe (based on trading volume).
Kraken allows crypto-to-fiat (and vice versa) trades and provides price information to Bloomberg Terminal. The exchange also offers a suite of institutional trading tools.
For example, Kraken was the first exchange to offer crypto futures in collaboration with CME Group.
Kraken is often lauded for its security measures. The exchange employs the “Security through Obscurity” principle – meaning that it keeps most of its security protocol details hidden from the public to make it more difficult for hackers to exploit any weaknesses.
In addition, all user funds are kept in “air-gapped” cold storage, which means that they are not connected to the internet and therefore less susceptible to hacking.
One downside of Kraken is that it does not offer a mobile app (although it does have a mobile-responsive website). This may be a dealbreaker for some investors who prefer to trade on the go.
So, what is the bottom line? If you are looking for a reliable and secure digital currency exchange, Kraken is a great alternative to Coinbase.