Who are Poloniex competitors?

Certainly! Here's a description that simulates the tone of a questioner, based on the given paragraph: "I'm curious to know, who are Poloniex's competitors in the cryptocurrency exchange space? Are there other platforms that offer similar services, with perhaps lower fees, more diverse trading pairs, or better user experiences? As a trader, I'm always looking to stay ahead of the curve and make sure I'm using the best platform for my needs. So, who are the main players that Poloniex has to contend with in this competitive market?