Who are Tezos competitors?

Could you elaborate on the topic of "Who are Tezos competitors?" I'm curious to know which blockchain platforms pose a significant challenge to Tezos in terms of market share, technology advancements, or even community support. Could you name a few key competitors and perhaps explain what sets them apart from Tezos? Additionally, how does Tezos position itself to compete effectively with these rivals in the rapidly evolving cryptocurrency landscape?