The word "rival" is used to talk about someone or something that is competing against another person or thing, usually trying to be better or win against them. Full definition
As a mid-sized van, it has an awful lot of rivals in one of the most competitive sectors of the market. (autoexpress.co.uk)
That's another year for rivals in the Android world to look at what works and what doesn't, and react to their biggest competitor. (androidcentral.com)
There's no shortage of rivals for the 911 and the competitor cars change according to the 911 model you choose. (evo.co.uk)