It is hard to say which one is best but it is easy to get. I have my own cryptocurrency exchange which works great and it has a considerable number of users. Launching a crypto exchange has now become a way to establish yourself in the emerging cryptosphere. All you need is a cryptocurrency exchange developer who can give you a perfect platform. I got my exchange developed from Technoloader which provided me an entire team of developers who worked together and delivered a flawless exchange that works on the blockchain.
They also took care of the marketing and my exchange got a great start. If you also want to make a successful bid in this domain, then get your own crypto exchange software. You can also have a security token exchange platform which would garner more users in the future.
Take a Look at Blockchain App Factory
Their white label bitcoin exchange platform software, that supports seamless exchange of bitcoins, as well as various other major cryptocurrencies all around the world. Their blockchain module is robust, and ensures high-performance, secure, instant, efficient and effective transactions which will bring in more users, and more traction for your business on a global scale.