What are some alternatives?
When comparing Battle Exchange and Code Fight Club, you can also consider the following products
hackattic - No nonsense, real world programming challenges
Frontloops - Level up your frontend skills with handcrafted tasks
Learney - Knowledge aggregator for developers
Py - Learn to code on the go 📱
Codewars - Achieve code mastery through challenge.
Code Racer - Find out how fast you code