There are many competitors for Monero, but none is powerful enough. And I will not discuss about the coins whose anonymity is not 100% certain, those I don't care about. Actually the only worthy new competitor for Monero would be Grin, if people would accept its inflationary nature.
I think in the future, if XRP has big evolution, it can be compete with Monero which one of the most favorite anonymous coins
Ok so now I am hearing that Ripple the "cryptocurrency" to connect banks together will be a contender to Monero whats going on here , also would love to stay on focus and know thoughts about Scroda's protocol.