I don't think there is any other competitor with ripple.It is one of it's own kind and could not be replace.Ripple has a very unique buisness core as it is decentralized but has tied up with lots of banks which runs on fiat and local currencies.Ripple is one the most popular coins in last few weeks and has achieve new heights in term of both price.Though allegation are that it is going to pumped but if i speak of today it is one of top coins.
Stellar is the runner-up in Ripple's core business and it gained good momentum along with Ripple.