Depending on the number of currencies you foresee to be traded on your exchange, the cost varies widely. If you want a token for your exchange, we can develop one for you through our token development service, the cost for that too would be separate. Overall, it’s really hard to predict even close to what would actually cost to build your custom cryptocurrency exchange. But worry not, as soon as you send in your requirements, we will get back to you within 24 hours with a precise quote.